Lecture notes are available for the first few lecture topics, but I don't plan to write notes for the rest of the semester.
Key references for each lecture are highlighted. Other references contain related material—historical developments, applications, later improvements and extensions, and the like—which I may only mention briefly (or not at all) in class. Some key sources are cited multiple times. *Starred authors were students when the work was written. These reference lists are out of date, but I will do my best to update them as the semester progresses. Eventually I hope to post a bibtex file that includes everything listed here; stay tuned!
All future lecture topics are subject to change! This schedule mostly mirrors the sequence of topics I covered in Spring 2011. Several relevant topics that I didn't have time to cover are listed after the main schedule; I might cover some of these topics this semester.
I am traveling Oct 15–17, Nov 11, and Dec 2. I hope to schedule makeup lectures outside the normal class meeting time. If scheduling proves prohibitive, I will try to arrange for guest lecturers instead.
Jon L. Bentley. Decomposable searching problems.
Information Processing Letters 8:244–251, 1979.
Jon L. Bentley. Multidimensional binary search trees used for associative
searching. Communications of the ACM 18:509–517, 1975.
[Introduces kd-trees, a prime example of a data structure that easily supports weak deletions, but not insertions or real deletions.]
Michael J. Clancy* and Donald E. Knuth. A Programming and Problem-Solving Seminar. Stanford University Computer Science Department Report STAN-CS-77-606, April 1977.
[One of the earliest examples of non-standard number systems being used to design efficient dynamic data structures—in this case, finger search trees.]
Kurt Mehlhorn.
Lower bounds on the efficiency of transforming static data structures
into dynamic data structures. Mathematical Systems Theory
15:1–16, 1981.
Kurt Mehlhorn
and Mark H. Overmars*.
Optimal dynamization of decomposable search problems.
Information Processing Letters 12:93–98, 1981.
Mark H. Overmars*.
The Design of Dynamic Data Structures.
Lecture Notes in Computer Science 156, Springer, 1983.
[Mark's PhD thesis. Describes several families of methods for transforming static data structures into fully dynamic data structures, along with several geometric applications. Still one of the best references for this material.]
Mark H. Overmars*
and
Jan van Leeuwen.
Two general methods for dynamizing decomposable searching problems.
Computing 26:155–166, 1981.
[Describes a lazy version of Bentley-Saxe to modify data
structures that support weak deletions and insertions, so that they support
real deletions.]
Mark H. Overmars*
and
Jan van Leeuwen.
Worst-case optimal insertion and deletion methods for
decomposable searching problems.
Information Processing Letters 12(4):168–173, 1981.
[Introduces the lazy local rebuilding technique for deamortizing Bentley-Saxe.]
Himanshu Suri and Victor Vazquez. Combination Pizza Hut and Taco Bell. Shut Up, Dude, 2010.
[They're at the Pizza Hut. They're at the Taco Bell. They're at the combination Pizza Hut and Taco Bell. Nearest neighbor searching is a decomposable search problem over an idempotent but non-inversive semigroup.]
Arne Andersson and
Tony W. Lai*.
Fast updating of well-balanced trees.
Proc. 2nd Scandinavian Workshop on Algorithm Theory 111–121.
Lecture Notes in Computer Science 447, Springer, 1990.
[Scapegoat trees with depth lg n+c require only
O(log²n/c) amortized time per insertion or deletion, for any constant c.
The amortized update time can be reduced to O(log n/c) using a
standard indirection trick: replace the leaves of the scapegoat tree
with perfectly balanced subtrees of size Θ(log n).]
Igal Galperin* and
Ronald L. Rivest.
Scapegoat trees.
Proc. 4th th Annual ACM-SIAM Symposium on Discrete Algorithms,
165–174, 1993.
[The second independent discovery of scapegoat
trees and the origin of the name.]
Splay trees: rotations, roller-coasters and zig-zags, weighted amortized analysis, O(log n) amortized time, static optimality theorem, static and dynamic finger properties, working set property, dynamic optimality and other splay tree conjectures
A Self-Adjusting Search Tree by Jorge Stolfi (1987)
Richard Cole,
Bud Mishra,
Jeanette Schmidt, and
Alan Siegel.
On the dynamic finger conjecture for splay trees. Part I: Splay
sorting log n-block sequences. SIAM J.
Computing 30:1–43, 2000.
Richard Cole.
On the dynamic finger conjecture for splay trees. Part II:
The proof. SIAM J. Computing 30:44–85, 2000.
Amr Elmasry.
On the sequential access theorem and deque conjecture for splay trees.
Theoretical Computer Science 314(3):459–466, 2004.
[Best upper bound known for the sequential access
theorem: Accessing all n elements of a splay tree in increasing order
requires at most 4.5n rotations.]
Seth Pettie.
Splay trees, Davenport-Schinzel sequences, and the deque conjecture.
Proc. 19th Annual ACM-SIAM Symposium on Discrete Algorithms 1115–1124,
2008.
[Proves that n deque operations on an n-node splay
tree require at most O(n α*(n)) time, where α*(n) is the
iterated inverse Ackermann function. The paper includes
a thorough survey of other splay tree results, up to 2008.]
Rajamani Sundar*. On the deque conjecture for the splay algorithm.
Combinatorica 12(1):95–124, 1992.
[Proves that n deque operations on an n-node splay
tree require at most O(n α(n)) time, where α(n) is the inverse
Ackermann function.]
Robert E. Tarjan.
Data Structures and Network Algorithms.
CBMS-NSF Regional Conference Series in Applied Mathematics 44,
SIAM, 1983.
[Includes a chapter on splay trees. Yes, it
took less time to publish an entire 130-page book than one
35-page journal paper.]
Robert E. Tarjan.
Sequential access in splay trees takes linear time.
Combinatorica 5:367–378, 1985.
[Established the sequential access theorem:
Accessing all n elements of a splay tree in increasing order
requires O(n) time.]
George F. Georgakopoulos.
Splay trees: a reweighting lemma and a proof of competitiveness
vs. dynamic balanced trees.
J. Algorithms 51:64–76, 2004.
[Defines a class of so-called parametrically
balanced dynamic binary search tree and proves that
splay trees are O(1)-competitive within this class.]
Dion Harmon*.
New Bounds on Optimal Binary Search Trees.
Ph.D. dissertation, Department of Mathematics, MIT, June 2006.
[Describes the results in Demaine et al. 2009 in
more detail, using slightly different terminology.]
John Iacono.
In pursuit of the dynamic optimality conjecture.
Space-Efficient Data Structures, Streams, and Algorithms, 236–250, 2013.
arXiv:1306.0207.
[Surveys lower bound techniques and presents a dynamic BST that is optimal,
assuming that an optimal dynamic BST exists at all.]
Joan M. Lucas.
Canonical forms for competitive binary search tree algorithms.
Tech. Rep. DCS-TR-250, Rutgers University, 1988.
[Introduces an offline dynamic binary search
tree algorithm, called GREEDYFUTURE
by Demaine et al.; see also Munro 2000.]
J. Ian Munro.
On the competitiveness of linear search.
Proc. 8th Annual European Symposium on Algorithms
338–345. Lecture Notes in Computer Science 1879, Springer, 2000.
[Independently describes the offline
dynamic binary search tree algorithm called IAN (“Introduce As Necessary”)
in Harmon's thesis and GREEDYFUTURE
by Demaine et al.; see also Lucas 1988.]
Robert E. Wilber*.
Lower bounds for accessing binary search trees with rotations.
SIAM J. Computing 18(1):56-67, 1989.
[Proves two important lower bounds on the total
access cost of dynamic binary search trees.]
Prosenjit Bose,
Karim Douïeb*,
and Stefan Langerman.
Dynamic optimality for skip lists and B-trees.
Proc. 19th Annual ACM-SIAM Symposium on Discrete Algorithms
1106–1114, 2008.
[Proves that among “weakly bounded” skip lists,
the working set bound is a lower bound on the access time, and describes
a “weakly bounded” deterministic self-adjusting skip list whose access
time is within a constant factor of the working set bound.]
Erik D. Demaine, Dion Harmon*,
John Iacono, and
Mihai Pătraşcu.
Dynamic
optimality—almost. SIAM J. Computing
37(1):240–251, 2007.
[Tango trees, the first O(log log n)-competitive
dynamic binary search tree. Only competitive for searches, not for
insertions or deletions.]
George F. Georgakopoulos.
Chain-splay trees, or, how to achieve and prove
log log n-competitiveness by splaying.
Information Processing Letters 106(1):37–43, 2008.
[Another O(log log n)-competitive dynamic binary
search tree, based on splaying.]
Jussi Kujala* and Tapio Elomaa.
Poketree: A dynamically competitive data structure with good
worst-case performance. Proc. 17th International Symposium
on Algorithms and Computation, 277–288. Lecture Notes in
Computer Science 4288, Springer, 2006.
[A O(log log n)-competitive dynamic data structure
with O(log n) worst-case access time, but strictly speaking not a
dynamic binary search tree.]
Dynamic forest maintenance:
Link-cut trees; CUT, JOIN, and FINDROOT in O(log n) amortized time; path queries and updates in O(log n) amortized time via lazy propagation; Euler-tour trees; subtree queries and updates in O(log n) amortized time; sketches of topology trees, top trees, rake-compress trees, and self-adjusting top trees.
A multilevel partition of an edge-weighted binary tree, and the resulting topology tree.
[Frederickson 1997]
David Eisenstadt.
dtree: Dynamic trees à la carte.
Last revised May 2014.
Last accessed September 2015.
[A C++ implementation of Sleator-Tarjan link-cut trees with (optional) support for subtree operations.]
Greg Frederickson.
Data structures for on-line updating of minimum spanning trees,
with applications. SIAM J. Computing 14:781–798, 1985.
[Topology trees.]
Greg Frederickson.
A data structure for dynamically maintaining rooted trees.
J. Algorithms 24:37–65, 1997.
[Directed topology trees.]
Andrew V. Goldberg,
Michael D. Grigoriadis, and
Robert E. Tarjan.
Use of dynamic trees in a network simplex algorithm for the maximum
flow problem. Mathematical Programming 50(1–3):277–290, 1991.
[Added subtree operations to link-cut trees.]
Daniel D. Sleator*
and
Robert E. Tarjan.
A data structure for dynamic trees.
J. Computer and System Sciences 26:362–391, 1983.
[The original formulation of link-cut trees
via biased trees, with O(log n) worst-case operation time.
Uses dynamic trees to obtain the first maximum-flow algorithm that
runs in O(mn log n) time, based on blocking flows.]
Robert E. Tarjan.
Data Structures and Network Algorithms.
CBMS-NSF Regional Conference Series in Applied Mathematics 44,
SIAM, 1983.
[Includes a chapter on link-cut trees, reformulated
to use splay trees.]
Robert E. Tarjan.
Efficiency of the primal network simplex algorithm for the minimum-cost
circulation problem. Mathematics of Operations Research
16(2):272–291, 1991.
[Added directed-path operations to link-cut trees.]
Robert E. Tarjan.
Dynamic trees as search trees via euler tours, applied to the
network simplex algorithm. Mathematical Programming
78(2):169–177, 1997.
[Euler-tour trees; see also Henzinger and King 1999.]
Robert E. Tarjan
and Uzi Vishkin. An efficient parallel biconnectivity algorithm.
SIAM J. Computing 14(4):862—874, 1985.
[Introduces the Euler tour technique in the
context of parallel algorithms.]
Robert E. Tarjan
and
Renato Werneck*.
Dynamic trees in practice.
J. Experimental Algorithmics 14, article 4.5, 2009.
[Compares several dynamic forest structures, including Euler-tour trees, rake-compress trees, splay-based link-cut trees, top trees, self-adjusting top trees, and a brute-force link-cut tree with only parent pointers. For small graphs (up to a few thousand vertices), brute force wins. For larger graphs, link-cut trees win in applications with more links and cuts, there is no clear winner in applications with more queries. Really, ACM, what is this "Article 4.5" nonsense?]
Fri Sep 18 Wed Sep 23
Applications of dynamic trees:
Maximum flows via network simplex; parametric and multiple-source shortest paths; dynamic graph connectivity
An edge pivots into a planar shortest-path tree as the source node moves along an edge.
[Chambers Cabello Erickson 2007]
David Eppstein.
Dynamic generators of topologically embedded graphs.
Proc. 14th Annual ACM-SIAM Symposium on Discrete Algorithms
599–608, 2003.
[Uses Thorup's dynamic connectivity data structure
to dynamically maintain the generators of a fundamental group of a
surface represented by a rotation system of a graph. Introduces
tree-cotree decompositions for surface graphs. Those two sentences
should make sense if you took my computational topology class last
year.]
Andrew V. Goldberg,
Michael D. Grigoriadis, and
Robert E. Tarjan.
Use of dynamic trees in a network simplex algorithm for the maximum
flow problem. Mathematical Programming 50(1–3):277–290, 1991.
[Used dynamic trees to obtain another maximum-flow
algorithm that runs in O(mn log n) time, based on network simplex,
using a pivot rule of Goldfarb and Hao.]
Philip Klein.
Multiple-source shortest paths in planar graphs.
Proc. 16th Annual ACM-SIAM Symposium on Discrete Algorithms
146–155, 2005.
[Implicitly computes all shortest-path trees rooted
on a single face of a planar graph in O(n log n) time. Stores
both the shortest path tree and the dual cotree in dynamic tree data
structures.]
Robert E. Tarjan.
Dynamic trees as search trees via euler tours, applied to the
network simplex algorithm. Mathematical Programming
78(2):169–177, 1997.
[Simplifies the O(mn log n)-time network-simplex
maximum-flow algorithm of Goldberg, Grigoriadis, and Tarjan using
Euler-tour trees.]
Mikkel Thorup.
Near-optimal fully-dynamic graph connectivity.
Proc. 32nd Annual Acm Symposium on Theory of Computing,
343–350, 2000.
[Edge insertions and edge deletions in
O(log n (log log n)^{3}) time and
connectivity queries in O(log n/log log log n)
time, almost matching the Ω(log n) lower bound.]
Fri Sep 25
Lower bounds for dynamic connectivity:
Cell probe model, prefix sums, reductions, time trees, non-deterministic encoding
Reducing dynamic prefix-sum to dynamic connectivity
[Demaine Pǎtraşcu 2006]
Michael L. Fredman and
Monika Rauch Henzinger.
Lower bounds for fully dynamic connectivity problems in graphs.
Algorithmica 22(3):351–362, 1998.
[Among other results, observes an easy reduction
from parity prefix sums to dynamic reachability. See also
Miltersen et al. 1994.]
Michael L. Fredman and
Michael E. Saks.
The cell probe complexity of dynamic data structures.
Proc. 21st ACM Symposium on Theory of Computing, 345–354, 1989.
[Introduces the chronogram technique for proving
cell=probe lower bounds. Proves an Ω(log n/log log n)
lower bound for dynamic parity prefix sum.]
Mihai Pătraşcu.
Unifying the landscape of cell-probe lowerbounds.
SIAM J. Computing 40(3): 827–847, 2011.
[Proves several cell-prove lower bounds, including
an Ω(log n/log log n) lower bound for dynamic connectivity,
via reductions from lopsided set disjointness.]
Mihai Pătraşcu* and
Corina E. Tarniţă*.
On dynamic bit-probe complexity.
Theoretical Computer Science 380, 2007.
[Reproves Ω(log n) cell-probe lower bound for
dynamic connectivity (by reduction from partial sums) using a
modification of Fredman and Saks' chronogram technique.]
Andrew Chi-Chih Yao.
Should tables be sorted? J. ACM 28(3):615–628, 1981.
[Formally introduces the cell-probe model of
computation. The answer is “Not if you can hash.”]
Clark A. Crane*. Linear lists and priority queues as balanced binary trees. Ph.D. thesis, Computer Science Department, Stanford University, 1972. Technical Report STAN-CS-72-259,
[Leftist heaps, the first priority queue to support Meld in O(log n) time.]
Michaël Eytzinger. Thesavrvs principvm hac ætate in Evropa viventium. Kempensem, Köln, 1590. [The first use of implicit binary trees.]
Robert W. Floyd. Algorithm 113: Treesort. Communications of the ACM 5(8):434, 1962.
[An early version of heapsort, which used an array as an implicit tournament tree.]
Robert W. Floyd. Algorithm 245: Treesort 3. Communications of the ACM 7(12):701, 1964.
[The algorithm now universally known as heapsort, including a linear-time in-place algorithm for building an implicit binary heap from an unsorted array.]
David B. Johnson. Priority queues with update and finding minimum spanning trees. Information Processing Letters 4(3):53–57, 1975.
[Implicit d-ary heaps.]
John W. J. Williams. Algorithm 232: Heapsort. Communications of the ACM 7(6):347–348, 1964.
[Array-based implicit heaps, and possibly the first use of the word “heap” to mean a data structure implementing a priority queue.]
Gerth Stølting Brodal*. Worst-case efficient priority queues. Proc. 7th ACM-SIAM Symposium on Discrete Algorithms, 52–58, 1996.
[The first priority queue whose worst-case time bounds match the amortized time bounds of Fibonacci heaps.]
Gerth Stølting Brodal, George Lagogiannis, and Robert E. Tarjan. Strict Fibonacci heaps. Proc. 44th ACM Symposium on Theory of Computing 1177--1184, 2012.
[The first pointer-based priority queue whose worst-case time bounds match the amortized time bounds of Fibonacci heaps.]
Timothy Chan. Quake heaps: A simple alternative to Fibonacci heaps. Space-Efficient Data Structures, Streams, and Algorithms: 27-32.
Lecture Notes in Computer Science 8066, Springer, 2013.
James R. Driscoll, Harold N. Gabow, Ruth Shrairman, and Robert E. Tarjan. Relaxed heaps: An alternative to Fibonacci heaps with applications to parallel computation. Commununications of the ACM 31(11):1343–1354, 1988.
[Frankie say the heap property doesn't always have to be satisfied everywhere.]
Stefan Edelkamp, Amr Elmasry, Jyrki Katajainen, and Armin Weiß. Weak heaps and friends: Recent developments. Proc. 24th International Workshop on Combinatorial Algorithms 1–6. Lecture Notes in Computer Science 8288, Springer, 2013.
[A brief survey of descendants of Dutton's weak heaps.]
Amr Elmasry. The violation heap: A relaxed Fibonacci-like heap. Proc. 16th Annual International Conference on Computing and Combinatorics 479–488, 2010.
Michael L. Fredman and Robert E. Tarjan. Fibonacci heaps and their uses in improved network optimization algorithms. J. Association for Computing Machinery 34(3):596–615, 1987.
[The original Fibonacci heap paper.]
Bernard Haeupler*, Siddhartha Sen*, and Robert E. Tarjan. Rank-pairing heaps. SIAM J. Computing 40(6):1463–1485, 2011.
[Lazy binomial queues with pairing by rank and rank-adjustment. Following the Red Herring Principle, rank-pairing heaps are not actually a variant of pairing heaps; by analogy, Fibonacci heaps should be called “degree-pairing heaps”.]
Peter Høyer. A general technique for implementation of efficient priority queues. Proc. 3rd Israel Symposium on Theory of Computer Systems, 57–66, 1995.
[Just what it says on the tin. Red-black heaps and mergeable double-ended priority queues.]
Haim Kaplan and Robert E. Tarjan. Thin heaps, thick heaps. ACM Transactions on Algorithms 4(1), Article 3, 2008.
Daniel D. Sleator* and Robert E. Tarjan. Self-adjusting heaps. SIAM J. Computing 15(1):52–69, 1986.
[Skew heaps, otherwise known as self-adjusting leftist heaps.]
Tadao Takaoka. Theory of 2-3 heaps. Discrete Applied Mathematics 126(1):115–128, 2003.
Tadao Takaoka. Theory of trinomial heaps. Proc. 6th Annual Int. Conf. Computing and Combinatorics, 362-372. Lecture Notes in Computer Science 1858, 2000.
Jean Vuillemin. A data structure for manipulating priority queues. Communications of the ACM 21, 309–314, 1978.
[Binomial “queues”.]
Ronald D. Dutton. Weak-heap sort. BIT 33(3):372–381, 1993.
[Weak heaps, a clever implicit variant of binomial queues. Roughly a factor of 2 faster than standard binary heaps, at the cost of one extra bit per item.]
Amr Elmasry. Pairing heaps with O(log log n) decrease cost. Proc. 20th Annual ACM-SIAM Symposium on Discrete Algorithms, 471–476, 2000.
[A variant of pairing heaps that is not covered by Fredman's lower bound.]
Amr Elmasry. Pairing heaps, scrambled pairing and square-root trees. International J. Computer Mathematics 87(14):3096–3110, 2010.
[A pairing heap with a bad pairing strategy can require Ω(√n) amortized time per operation.]
Michael L. Fredman. On the efficiency of pairing heaps and related data structures. J. ACM 46(4):473–501, 1999.
[Pairing heaps require Ω(log log n) amortized time for DecreaseKey.]
Michael L. Fredman, Robert Sedgewick, Daniel D. Sleator*, and Robert E. Tarjan. The pairing heap: A new form of self-adjusting heap. Algorithmica 1(1):111–129, 1986.
Seth Pettie. Towards a final analysis of pairing heaps. Proc. 46th Annual IEEE Symposium on Foundations of Computer Science, 174–183, 2005.
[O(2^{2 sqrt{log log n}}) amortized time for Insert, Meld, and DecreaseKey. Not universally believed.]
Yossi Azar, Andrei Z. Broder, Anna R. Karlin, and Eli Upfal.
Balanced allocations.
SIAM J. Computing 29(1):180–200, 1999.
[The power of two choices. In a chained hash table
with two hash functions, where new items are always inserted into
the smaller of the two chains, the expected length of the longest
chain is only O(log log n).]
Andrei Z. Broder and Anna R. Karlin.
Multilevel adaptive hashing.
Proc. 1st Annual ACM-SIAM Symposium on Discrete Algorithms
43-53, 1990.
[Maintain O(log log n) hash tables, where
the ith table has size O(n/2^{i}), and insert each new item
into the minimum-index table where the item's slot is empty.]
Arnold I. Dumey.
Indexing for rapid random-access memory.
Computers and Automation 5(12):6–9, 1956.
[The first published paper on hashing, although he
didn't call it that. According to Knuth, hashing was described in
several earlier internal IBM technical reports, but those reports
were never published, so I can't cite them.]
Michael L. Fredman, János Komlós, and Endre Szemerédi.
Storing a sparse table with O(1) worst-case access time.
J. ACM 31(3):538–544, 1984.
[Introduced static “perfect” hashing.]
Donald E. Knuth*.
Notes on ”open” addressing.
Unpublished memorandum. July 22, 1963.
[pdf version]
[The first theoretical analysis of linear probing,
and Knuth's first analysis of an algorithm. Yes, he was a student,
but just barely.]
Martin Dietzfelbinger and Christoph Weidling.
Balanced allocation and dictionaries with tightly packed constant size bins.
Theoretical Computer Science 380:47–68, 2007.
[Extends cuckoo hashing to store n keys in (1+ε)n
memory cells, using only two hash functions, by storing O(log(1/ε))
items in each bin instead of just one. Compare Fotakis et al. 2005.]
Dimitris Fotakis,
Rasmus Pagh,
Peter Sanders,
and Paul Spirakis.
Space efficient hash tables with worst-case constant access time.
Theory of Computing Systems 38:229–248, 2005.
[Extends cuckoo hashing to store n keys in
(1+ε)n memory cells, using O(log(1/ε)) hash functions instead
of just two. Compare Dietzfelbinger and Weidling 2007.]
Alan Frieze, Páll Melsted*, and Michael Mitzenmacher.
An analysis of random-walk cuckoo hashing.
Proc. 12th International Workshop on Approximation Algorithms
in Combinatorial Optimization (APPROX), 350–364.
Lecture Notes in Computer Science 5687, 2009.
[Proves that the insertion time for cuckoo hashing
with d>2 hash functions is polylogarithmic with high probability
(unless the table load is very close to 1), if insertions are
performed by a random walk in the cuckoo graph.]
Rasmus Pagh* and
Flemming Friche Rodler.
Cuckoo hashing.
J. Algorithms 51(2):122-144, 2004.
[There's a sad sort of clanging from the clock in
the hall / And the bells in the steeple too / And up in the nursery an
absurd little bird / Is popping out to say cuckoo]
Good hash functions: Uniform versus k-universality vs k-independent vs ideal, polynomial hashing, tabulation hashing, tabulation with guaranteed independence, tail bounds without independence
J. Lawrence Carter and Mark N. Wegman.
Universal classes of hash functions.
J. Computer and System Sciences 18(2):143–154, 1979.
[Introduced universal and strongly universal
hashing, and reintroduced tabulation hashing. Proved that 3-universal
hash functions can be composed using bitwise exclusive-or:
If h₀, h₁, ..., hᵣ are independent and strongly 3-universal,
then H(x₀, x₁, ..., xᵣ) = h₀(a₀) ⊕ h₁(x₁) ⊕ ... ⊕ hᵣ(xᵣ)
is also strongly 3-universal.]
Anna Pagh,
Rasmus Pagh,
and Milan Ružić*.
Linear probing with constant independence.
SIAM J. Computing 39(3):1107–1120, 2009.
[Hashing with linear probing takes Ω(log n)
expected worst-case time for pairwise independent hash
functions, but O(1) expected worst-case time with 5-independent
hash functions.]
Mihai Pătraşcu and
Mikkel Thorup.
Twisted tabulation hashing.
Proc. 24th Annual ACM-SIAM Symposium on Discrete Algorithms,
209–228, 2013.
[Adding a second-order tabulation lookup gives much
stronger concentration bounds.]
Alan Siegel
and Jeanette P. Schmidt.
Closed hashing is computable and optimally randomizable with universal hash functions.
Technical Report TR1995-687, New York University, April 1995.
[Hashing with linear probing takes O(1)
expected worst-case time with O(log n)-independent
hash functions.]
Mikkel Thorup.
String hashing for linear probing.
Proc. 20th Annual ACM-SIAM Symposium on Discrete Algorithms, 655–664, 2009.
Mikkel Thorup and
Yin Zhang.
Tabulation based 4-universal hashing with applications to second
moment estimation.
Proc. 15th ACM/SIAM Symposium on Discrete Algorithms
615–624, 2004.
[Proves that the composite hash function H(x,y)
:= h(x) ⊕ h'(y) ⊕ h''(x+y) is 4-universal if the component hash
functions h, h', h'' are independent and 4-universal.]
Mark N. Wegman and J. Lawrence Carter.
New classes and applications of hash functions.
J. Computer and System Sciences 22(3):265–279, 1981.
[Degree-(k-1) polynomials over any finite field
can be used for strongly k-universal hashing.]
Albert L. Zobrist. A new hashing method with application for game playing.
Technical Report 88, Computer Sciences Department, University of Wisconsin,
Madison, 1969.
[Introduced tabulation hashing.]
Burton H. Bloom.
Space/time trade-offs in hash coding with allowable errors.
Communications of the ACM 13(7):422–426, 1970.
Prosenjit Bose, Hua Guo, Evangelos Kranakis, Anil Maheshwari,
Pat Morin, Jason Morrison, Michiel Smid, and Yihui Tang.
On the false-positive rate of Bloom filters.
Information Processing Letters 108(4):210–213, 2008.
Ken Christensen, Allen Roginsky, Miguel Jimenoa.
A new analysis of the false positive rate of a Bloom filter.
Information Processing Letters 110:944—949, 2010.
Li Fan, Pei Cao, Jussara Almeida, and Andrei Broder.
Summary cache: A scalable wide-area Web cache sharing protocol.
IEEE/ACM Transactions on Networking 8(3):281–293, 2000.
Michael T. Goodrich and Michael Mitzenmacher.
Invertible Bloom lookup tables.
Proc.49th Allerton Conference on Communication, Control and Computing,
792–799, 2011.
ArXiv:1101.2245.
Michael Mitzenmacher.
Compressed Bloom filters.
IEEE/ACM Transactions on Networking 10(5):604–612, 2002.
Anna Pagh, Rasmus Pagh, and S. Srinivasa Rao.
An optimal Bloom filter replacement.
Proc. 16th Annual ACM-SIAM Symposium on Discrete Algorithms
823—829, 2005.
Fri Oct 23
Locality-sensitive hashing
Periodically covering the plane with balls. Andoni and Indyk [CACM 2008]
Anirban Dasgupta, Ravi Kumar, and Tamás Sarlós.
Fast locality-sensitive hashing.
Proc. 17th ACM SIGKDD International Conference on Knowledge Discovery and
Data Mining, 1073–1081, 2011.
[Randomized Hadamard transformations instead of random rotations.]
Piotr Indyk* and
and Rajeev Motwani†.
Approximate nearest neighbors: towards removing the curve of dimensionality.
Proc. 30th Annual ACM Symposium on Theory of Computing
604–613, 1998.
Adam Kirsch* and Michael Mitzenmacher.
Distance-sensitive Bloom filters.
Proc. 8th Workshop Algorithm Engineering and Experiments,
41–50, 2006.
[Combines locality sensitive hashing with Bloom filters.]
Alberto Bertoni, Giancarlo Mauri, Nicoletta Sabadini.
A characterization of the class of functions computable in polynomial
time on Random Access Machines.
Proc. 13th Annual ACM Symposium on Theory of Computing
168–176, 1981.
Alberto Bertoni, Giancarlo Mauri, Nicoletta Sabadini.
Simulations among classes of random access machines and equivalence among numbers
succinctly represented.
Annals of Discrete Mathematics 25:65–90, 1985.
Michael Brand.
Computing with and without arbitrary large numbers.
Proc. 10th International Conference on Theory and Applications of Models
of Computation, 182--192, 2013.
[The unit-cost integer RAM with addition, subtraction, exact division
(defined only when the result is an integer), left shift, booleans, and comparisons
can compute in polynomial time any function computable on a Turing machine in
time bounded by 2⇑n^{O(1)}, where 2⇑k means an exponential twoer of 2's of height k.]
Stephen A. Cook and Robert A. Reckhow.
Time bounded random-access machines.
Journal of Computer and Systems Sciences 7:354–375, 1973.
[]
Peter van Emde Boas.
Machine models and simulations.
Handbook of Theoretical Computer Science, Volume A:
Algorithms and Complexity, 1–66.
Jan van Leeuwen, editor, MIT Press, 1990.
Juris Hartmanis and Janos Simon.
On the power of multiplication in random access machines.
15th Annual IEEE Symposium on Switching and Automata Theory
13–23, 1974.
Vaughan R. Pratt, Michael O. Rabin, and Larry J. Stockmeyer.
A characterization of the power of vector machines.
Proc. 6th Annual ACM Symposium on Theory of Computing
122–134, 1974.
Arnold Schönhage.
On the power of Random Access Machines.
Proc. 6th International Colloqiuum on Automata, Languages, and Programming
520--529, 1979.
Janos Simon.
Division in idealized unit cost RAMs.
J. Computer and System Sciences 22(3):421–441, 1981.
[The unit-cost integer RAM with addition, subtraction, exact division
(defined only when the result is an integer), left shift, booleans, and comparisons
can compute in polynomial time any fucntion computable on a Turing machine in
elementary time. Corrected by Brand 2013.]
Janos Simon and Mario Szegedy.
On the complexity of RAM with various operation sets.
Proc. 24th Annual ACM Symposium on Theory of Computing, 624–631, 1992.
Wed Oct 28 Fri Oct 30
Realistic integer RAMs: transdichotomous RAM, word RAM, AC⁰ RAM
Ordered dictionaries: van Emde Boas trees, x-fast tries, y-fast tries via indirection, fusion trees, exponential search trees
Predecessor search over a finite universe [Mihai Pătraşcu]
Part of a exponential tree, with the root on the left and children on the right [Andersson Thorup 2007]
Arne Andersson.
Faster deterministic sorting and searching in linear space.
Proc. 37th Annual IEEE Symposium on Foundations of Computer
Science 135–141, 1996.
[Dynamic ordered dictionary with O(√log n)
query and amortized update time using O(n) space, for any word
size w, via exponential trees.]
Rene De La Briandais.
File searching using variable length keys.
1959 Proc. Western Joint Computer Conference, 295–298,
1959.
[Describes a tree data structure similar to tries,
but with (sparse) high-degree nodes represented by linked lists.]
Arne Andersson,
Peter Bro Miltersen,
and
Mikkel Thorup.
Fusion trees can be implemented with AC⁰ instructions only.
Theoretical Computer Science 215(1-2):337-344, 1999.
[...but they may require AC⁰ instructions that
are not standard C operations.]
Arne Andersson and
Mikkel Thorup.
Dynamic ordered sets with exponential search trees.
J. ACM 54(3), article 13, 2007.
[Combined journal version of Andersson's FOCS 1996
paper and Andersson and Thorup's STOC 2000 paper.]
Arne Andersson and
Mikkel Thorup.
Tight(er) worst-case bounds on dynamic searching and priority queues.
Proc. 32nd Annual ACM Symposium on Theory of Computing,
335–342, 2000.
[Dynamic ordered dictionary with
with optimal worst-case update and query time
O(sqrt(log n/log log n)), using O(n) space,
for any word size w, using only C instructions (including
multiplication), via worst-case efficient exponential trees.]
Paul Beame and Faith E. Fich.
Optimal bounds for the predecessor problem and related problems.
J. Computer and System Sciences 65(1):38–72, 2002.
[Dynamic ordered dictionary with optimal
query and amortized update time
O(min{log w/log log w,
sqrt(log n/log log n)}), using Andersson's exponential
search trees, as well as matching cell-probe lower bounds. The paper
includes an impressively thorough survey of previous upper and lower
bounds for ordered dictionaries and several related data structure
problems.]
Peter van Emde Boas.
An O(n log log n) on-line algorithm for the Insert-Extract
Min problem.
Technical Report TR 74-221, Computer Science Department,
Cornell University, December 1974.
[The original version of “stratified trees”, which
required O(u log log u) space.]
Peter van Emde Boas.
Preserving order in a forest in less than logarithmic time.
16th Annual IEEE Symposium on Foundations of Computer Science
75–84, 1975.
[An updated version of “stratified trees” that uses
only O(u) space, by way of indirection. Apparently the idea of separately
storing the min and max element of every chunk was developed later.]
Peter van Emde Boas, R. Kaas, and E. Zijlstra.
Design and implementation of an efficient priority queue.
Mathematical Systems Theory 10:99–127, 1977.
[The first formal publication of the original version
of “stratified trees”, which required O(u log log u) space.
I never knew that the up-tree data structure for disjoint sets was
called a ”Tritter tree“!]
Edward Fredkin. Trie memory.
Communications of the ACM 3:490–499, 1962.
[Fredkin pronounced it “tree”, as in
”retrieval”.]
Michael L. Fredman and Dan E. Willard.
BLASTING through the information theoretic barrier with
FUSION TREES.
Proc. 22nd Annual ACM Symposium on Theory of Computing
1-7, 1990.
[The conference version of the original fusion tree
paper. Dynamic ordered dictionary with O(log n/log w) query
and (amortized) update time using O(n) space. If you cite this paper,
please use the proper capitalization and sizing; thank you.]
Michael L. Fredman and Dan E. Willard.
Surpassing the information theoretic bound with fusion trees.
J. Computer and System Sciences 47(3):424-436, 1993.
[The journal version of the original fusion tree
paper. Apparently the referees did not have a sense of humor.]
Michael L. Fredman and Dan E. Willard.
Trans-dichotomous algorithms for minimum spanning trees and shortest paths.
J. Computer and System Sciences 48:533–551, 1994.
Mihai Pătraşcu and
Mikkel Thorup.
Time-space trade-offs for predecessor search.
Proc. 38th Annual ACM Symposium on Theory of Computing,
232–240, 2006.
Mihai Pătraşcu and
Mikkel Thorup.
Randomization does not help searching predecessors.
Proc. 18th Annual ACM/SIAM Symposium on Discrete Algorithms
555–564, 2007.
[Tight cell-probe lower bounds for static ordered
dictionaries, for any number of integers with any number of bits each,
any word size, and any space bound.]
Dan E. Willard.
Log-logarithmic worst case range queries are possible in space O(N).
Information Processing Letters 17(2):81–89, 1983.
[x-fast tries and y-fast tries: queries in
O(log w) time using O(n) space. The paper only describes the
static data structure, because dynamic perfect hash tables were not
yet known.]
Dan E. Willard.
New trie data structures which support very fast search operations.
J. Computer and System Sciences 28:379–394, 1984.
[p-fast tries and q-fast tries: both queries and
updates in O(sqrt{w}) time using O(n) space.]
Wed Nov 4
Sorting a stack of Indecks notched cards. From The Last Whole Earth Catalog (1975)
Arne Andersson,
Torben Hagerup,
Stefan Nilsson*.
Blasting past fusion trees.
Technical Report LU-CS-TR:94-135, Department of Computer Science,
Lund University, 1994.
[O(n log log n) time for all w≥log n.
Requires hashing (and therefore randomization) to work in only O(n)
space. See also Han and Shen 1995.]
Arne Andersson,
Torben Hagerup,
Stefan Nilsson*, and
Rajeev Raman.
Sorting in linear time?
J. Computer and System Sciences 57(1):74–93, 1998.
[Signature Sort: O(n) expected time for all w ≥
Ω(log^{2+ε} n), using a "full instruction set". Also:
O(n log log n) time for all w, using a restricted instruction
set (and hashing to get O(n) space).]
Kenneth E. Batcher.
Bitonic sorting.
Goodyear Aerospace Report GER-11869, 1964.
[Batcher got his PhD from UIUC in 1964!]
Kenneth E. Batcher.
Sorting networks and their applications.
Proc. AFIPS Spring Joint Computer Conference, Vol. 32, 307–314, 1968.
[Bitonic and even-odd sorting networks. Bitonic
mergesort is a key component in Albers and Hagerup's packed sorting
algorithm. Batcher got his PhD from UIUC in 1964!]
Amir M. Ben-Amram* and
Zvi Galil.
When can we sort in o(n log n) time?
J. Computer and System Sciences 54:345–370, 1997.
[If and only if (1) either w is not enormous or we
allow nonuniform algorithms, and (2) either memory is huge or we allow
double-precision multiplication.]
Leslie J. Comrie. The Hollerith and Powers tabulating machines.
Transactions of the Office Machinery Users' Association,
25–37, 1929–30.
[Possibly the first published description of
radix sort. Comrie was the first person to use punched-card
equipment for scientific (rather than business and statistical)
purposes.]
Yijie Han.
Fast integer sorting in linear space.
Proc. 17th Annual Symposium on Theoretical Aspects of Computer
Science, 242–253.
Lecture Notes in Computer Science 1770, Springer, 2000.
[O(n (log log n)^{3/2}) time, without
hashing.]
Yijie Han.
Improved fast integer sorting in linear space.
Proc. 12th Annual ACM-SIAM Symposium on Discrete Algorithms,
793–796, 2001.
[O(n log log n log log log n)
time for all w, and O(n log log n) for all w ≥
Ω(log^{2+ε} n), without hashing.]
Yijie Han.
Deterministic sorting in O(n log log n) time and linear space.
J. Algorithms 50(1):96–105, 2004.
[Avoids hashing.]
Yijie Han and
Xiaojun Shen.
Conservative algorithms for parallel and sequential integer sorting.
Proc. 1995 International Computing and Combinatorics
Conference, 324–333. Lecture Notes in Computer
Science 959, Springer, 1995.
[O(n log log n) time for all w≥log n.
Requires hashing (and therefore randomization) to work in only O(n)
space. See also Andersson, Nilsson, and Hagerup 1994.]
Yijie Han and
Mikkel Thorup.
Integer sorting in O(n √log log n) expected time and
linear space.
Proc. 43rd Symposium on Foundations of Computer Science,
135–144, 2002.
Herman Hollerith.
Complete specification: Improvements in the methods of and apparatus
for compiling statistics. UK Patent № 327, January 8, 1889.
[Includes a description of multi-key sorting, using
an algorithm similar to radix sort.
“The most complicated combinations can readily be counted with
comparatively few counters or relays by first assorting the cards
according to the first items entering into the combinations, then
re-sorting each group according to the second item entering into the
combination, and so on, and finally counting on a few counters the
last item of the combinations for each group of cards.“]
David G. Kirkpatrick and Stefan Reisch*.
Upper bounds for sorting integers on random access machines.
Theoretical Computer Science 28(3):263–276, 1984.
[How to sort n integers in O(n log(w/log n))
time on a w-bit word RAM, or in O(n) time on an abstract integer RAM.]
Mikkel Thorup.
Randomized sorting in O(n log n) time and linear space
using addition, shift, and bit-wise boolean operations.
J. Algorithms, 42(2):205–230, 2002.
Dan E. Willard.
Log-logarithmic worst case range queries are possible in space O(N).
Information Processing Letters 17(2):81–89, 1983.
[How to sort n integers in O(n log w) time,
via y-fast tries.]
Miklós Ajtai, Michael L. Fredman, and János Komlós.
Hash functions for priority queues.
Information and Control 63(3):217–225, 1984.
[Θ(w^{n-1}) space is necessary and sufficient for
O(1)-time priority queues via hashing.]
Stephen Alstrup,
Thore Husfeldt,
Theis Rauhe, and
Mikkel Thorup.
Black box for constant-time insertion in priority queues.
ACM Transactions on Algorithms 1(1):102–106, 2005.
[Any priority queue that supports INSERT,
DELETE, and FINDMIN in t(n)
time can be transformed into a priority queue that supports
INSERT and FINDMIN in O(1)
time and DELETE in O(t(n)) time.]
Arne Andersson and
Mikkel Thorup.
Dynamic ordered sets with exponential search trees.
J. ACM 54(3), article 13, 2007.
[Exponential trees: A sorting algorithm that runs in
nS(n) time can be used as a black box to implement a priority queue
supporting all operations in O(S(n) log log n) time.]
Peter van Emde Boas, R. Kaas, and E. Zijlstra.
Design and implementation of an efficient priority queue.
Mathematical Systems Theory 10:99–127, 1977.
[Any priority queue that supports INSERT,
DELETE, and FINDMIN in t(n)
amortized time can be modified to support INSERT,
DELETE, FINDMIN, and
MELD in O(t(n)α(n)) amortized time, where α(n) is the
inverse Ackermann function. The new meldable priority queue is a
union-find structure whose nodes are black-box non-meldable priority
queues.]
Michael L. Fredman and Dan E. Willard.
Surpassing the information theoretic bound with fusion trees.
J. Computer and System Sciences 47(3):424-436, 1993.
[Atomic heaps: maintain O(log²n) items in O(1) time
per operation. The main component of fusion trees and AF-heaps.]
Michael L. Fredman and Dan E. Willard.
Trans-dichotomous algorithms for minimum spanning trees and shortest paths.
Proc. 31st Annual IEEE Symposium on Foundations of Computer
Science 719–725, 1990.
[Minimum spanning trees in O(m) time via atomic heaps.
Dijkstra's shortest path algorithm in O(m + n
log n/log log n) time via atomic Fibonacci heaps.]
Ran Mendelson*,
Robert E. Tarjan,
Mikkel Thorup, and
Uri Zwick.
Melding priority queues.
ACM Transactions on Algorithms 2(4):535–556, 2006.
[Improves the analysis of van Emde Boas, Kass, and
Zijlstra's priority queue reduction. Any priority queue that supports
INSERT, DELETE, and
FINDMIN in t(n) amortized time can be
modified to support INSERT,
FINDMIN, and MELD in O(1)
amortized time, and DELETE in O(t(n) + α(n)) amortized
time, where α(n) is the inverse Ackermann function.]
Mikkel Thorup.
Equivalence between priority queues and sorting.
J. ACM 54(6), article 28, 2007.
[A sorting algorithm that runs in nS(n) time can
be used as a black box to implement a priority queue that supports
INSERT and DELETEin O(S(n)) time and
FINDMIN in O(1) time, on an integer
RAM with multiplication. (The reverse reduction is trivial.)
The results are slightly weaker for AC⁰ RAMs.]
A phylogeny of Christian churches reconstructed from memetic analysis (with the Episcopalian meme given a weight of 8) [Lord and Price 2001]
Least common ancestors: reduction from range minimum queries, reduction to ±1 range minimum queries, induction, the four-Russians trick, heavy-light tree decomposition (again), alphabetic coding, longest common prefix (again), rake-compress trees (again)
Omer Berkman*,
Dany Breslauer*,
Zvi Galil,
Baruch Schieber*,
and
Uzi Vishkin. Highly parallelizable problems.
Proc. 21st Annual ACM Symposium on Theory of Computing,
309–319, 1989.
Omer Berkman* and
Uzi Vishkin.
Recursive star-tree parallel data structure.
SIAM J. Computing 22(2):221–242, 1993.
Dov Harel*.
A linear time algorithm for the lowest common ancestors problem
(extended abstract).
Proc. 21st Annual IEEE Symposium on Foundations of Computer
Science, 308–319, 1980.
Dov Harel* and
Robert E. Tarjan.
Fast algorithms for finding nearest common ancestors.
SIAM J. Computing 13(2):338–355, 1984.
Harold N. Gabow,
Jon Louis Bentley, and
Robert E. Tarjan.
Scaling and related techniques for geometry problems".
Proc. 16th ACM Symposium on Theory of Computing
135–143, 1984.
Baruch Schieber*
and
Uzi Vishkin.
On finding lowest common ancestors: Simplification and parallelization.
SIAM J. Computing 17(6):1253–1262, 1988.
AVL dags and version trees [Fraser and Myers 1987]
Full persistence: Euler tours, ordered list maintenance, virtual scapegoat trees
Arne Andersson.
General balanced trees.
J. Algorithms 30:1–28, 1999.
[The rebalancing algorithm for scapegoat trees is
almost identical to the tag relabeling algorithm of Bender et al.,
including the analysis. Both algorithms redistribute keys in an
unbalanced interval as evenly as possible, so that there are exactly
two gap sizes. The only difference between the algorithms is
that in the tag relabeling algorithm, the two gap sizes are
consecutive integers, but using scapegoat trees, the two gap sizes
are consecutive powers of 2.]
Michael A. Bender, Richard Cole, Erik D. Demaine,
Martin Farach-Colton, and Jack Zito*.
Two simplified algorithms for maintaining order in a list.
Proc. 10th Annual European Symposium on Algorithms, 152–164.
Lecture Notes in Computer Science 2461, Springer, 2002.
Paul F. Dietz. Maintaining order in a linked list.
Proc. 14th Annual ACM Symposium on Theory of Computing,
122–127, 1982.
James R. Driscoll, Daniel D. K. Sleator, and Robert E. Tarjan.
Fully persistent lists with catenation.
J. ACM 41(5): 943–959, 1994.
Amos Fiat and
Haim Kaplan.
Making data structures confluently persistent.
J. Algorithms 48:16–38, 2000.
Gerard Huet. Functional pearl: The zipper.
J. Functional Programming 7(5):549-554, 1997.
Haim Kaplan,
Chris Okasaki, and Robert E. Tarjan.
Simple confluently persistent catenable lists.
SIAM J. Computing 30(3):965-977, 2000.
Haim Kaplan and
Robert E. Tarjan.
Purely functional, real-time deques with catenation.
J. ACM 46(5):577–603, 1999.
Chris Okasaki*.
Amortization, lazy evaluation, and persistence: Lists with
catenation via lazy linking.
Proc. 36th Annual IEEE Symposium on Foundations of Computer
Science, 646–654, 1995.
Chris Okasaki.
Purely Functional Data Structures.
Cambridge University Press, 1998.
Chris Okasaki*.
Purely Functional Data Structures.
Ph.D. thesis, School of Computer Science, Carnegie Mellon University,
September 1996.
Chris Okasaki*.
The role of lazy evaluation in amortized data structures.
SIGPLAN Notices 31(6), 62–72, 1996.
They Might Be Giants. Fingertips. Apollo 18, 1992.
The Residents. Fingertips. The Commercial Album, 1980.
Stevie Wonder*. Fingertips. The 12-Year-Old Genius, 1963.
Wed Nov 25 Fri Nov 27
Thanksgiving break: No class this week
Wed Dec 2
No class today: Jeff is at the Simons Institute
Fri Dec 4
Primer timelines [SPOILER!]
Retroactively inserting insertions. [Demaine et al. 2007]
“You're about to have an idea for a time machine.” “I am?”
Primer timelines [SPOILER!]
Retroactive data structures: changing the past, rollback, lower bounds via polynomial evaluation, retroactive priority queues via bridges, partial to full retroactivity via √m checkpoints
Umut A. Acar,
Guy E. Blelloch,
Ruy Ley-Wild*,
Kanat Tangwongsan*,
and
Duru Türkoğlu*.
Traceable data types for self-adjusting computation.
Proc. 2010 ACM SIGPLAN Conference on Programming Language
Design and Implementation, 483–496, 2010.
[A variant of retroactive data structures that
maintains a list of queries as well as updates; any revision returns
a pointer to the earliest query whose answer is changed by the
revision.]
Erik D. Demaine, John Iacono, and Stefan Langerman.
Retroactive data structures.
ACM Transactions on Algorithms 3(2), article 13, 2007.
[Introduced retroactive data structures.]
Matthew T. Dickerson, David Eppstein, and Michael T. Goodrich.
Cloning Voronoi diagrams
via retroactive data structures.
Proc. 18th Annual European Symposium on Algorithms, 362–373.
Lecture Notes in Computer Science 6346, Springer, 2010.
Yoav Giora* and
Haim Kaplan.
Optimal dynamic vertical ray shooting in rectilinear planar
subdivisions.
ACM Transactions on Algorithms 5(3), article 28, 2009.
[Journal version of the following paper. Yes,
the first author's name is spelled correctly.]
Yoav Giyora* and
Haim Kaplan.
Optimal dynamic vertical ray shooting in rectilinear planar
subdivisions.
Proc. 18th Annual ACM-SIAM Symposium on Discrete Algorithms,
19–28, 2007.
[Fully dynamic retroactive ordered dictionaries with
O(log n) worst-case retroactive query and revision time. The time
bound is optimal in the comparison model, but the data structure
requires the word-RAM model internally. Yes, the first author's name
is spelled correctly.]
Yakov Nekrich.
Searching in dynamic catalogs on a tree.
Preprint, July 2010.
ArXiv:1007.3415.
[Fully dynamic retroactive ordered dictionaries with
O(log n/log log n) retroactive update time, which is
optimal in the cell probe model by reduction from the marked
ancestor problem.]
External-memory data structures: basic definitions and parameters (N, M, and B), fundamental upper and lower bounds (scan, sort, permute, and search), B-trees, sub-constant-time updates via buffering
Alok Aggarwal and
Jeffrey Scott Vitter.
The input/output complexity of sorting and related problems.
Communications of the ACM 31(9):1116–1127, 1988.
[Introduces the formal external-memory model; proves
that sorting requires sort(N) := Θ(n log_{m} n) I/Os and
permuting requires Θ(min{N, n log_{m} n}) I/Os; describes
optimal external-memory versions of mergesort and quicksort.]
Lars Arge,
Andrew Danner*, and Sha-Mayn Teh*.
I/O-efficient point location using persistent B-trees.
J. Experimental Algorithmics 8, article 2.1, 2003.
[Describes subtle but important changes to persistent
B-trees making them useful for point location.]
Bruno Becker, Stephan Gschwind, Thomas Ohler, Bernhard Seeger,
and Peter Widmayer.
An asymptotically optimal multiversion B-tree.
VLDB Journal 5(4):264–275, 1996.
[Describes an external-memory version of the
partial persistence via node-splitting, and develops an efficient
partially persistent B-tree.]
Ramzi Fadel*, Kim Vagn Jakobsen*,
Jyrki Katajainen, and
Jukka Teuhola.
Heaps and heapsort on secondary storage.
Theoretical Computer Science 220(2):345–362, 1999.
[Uses buffer tree to implement an optimal
external-memory version of heapsort.]
Rasmus Pagh.
Basic external memory data structures.
Algorithms for Memory Hierarchies: Advanced Lectures, 14–35.
Ulrich Meyer, Peter Sanders, and Jop F. Sibeyn, editors.
Lecture Notes in Computer Science 2625, Springer, 2003.
Peter Sanders.
Memory Hierarchies—Models and Lower Bounds.
Algorithms for Memory Hierarchies: Advanced Lectures, 1–13.
Ulrich Meyer, Peter Sanders, and Jop F. Sibeyn, editors.
Lecture Notes in Computer Science 2625, Springer, 2003.
Answering a 3-sided query: One node in an external-memory priority search tree [Agarwal et al. 2002]
Answering a 3-sided query: Inside the catalog structure [Agarwal et al. 2002]
External-memory range searching: external-memory interval trees; external-memory priority search trees; catalog structures for O(B²) points/intervals; external-memory range trees.
Pankaj K. Agarwal,
Lars Arge, and
Jeff Erickson.
Indexing moving points.
J. Computer and System Sciences 66:207-243, 2003.
[Persistent kinetic multilevel external range trees.
Whew!]
Lars Arge
and Jeffrey Scott Vitter.
Optimal external memory interval management.
SIAM J. Computing 32(6):1488–1508, 2003.
[External-memory interval trees.]
Lars Arge,
Vasilis Samoladas*, and
Jeffrey Scott Vitter.
On two-dimensional indexability and optimal range search indexing.
Proc. 18th ACM Symposium on Principles of Database Systems
346–357, 1999.
[External priority search trees, including the
B²-point catalog structure, and external range trees.]
Bernard Chazelle.
Lower bounds for orthogonal range searching: I. The reporting case.
J. ACM 37(2):200–212, 1990.
[Any in-core data structure that stores n points in the
plane in S(n) space and answers rectangular range-reporting queries in
T(n) + O(k) time must satisfy S(n) log T(n) = Ω(n log n). In particular,
if T(n) = O(polylog n), then S(n) = Ω(n log n/log log n).
I wish I'd had time to talk about this.]
Paris Kanellakis,
Sridhar Ramaswamy*, Darren E. Vengroff*,
and Jeffrey Scott Vitter.
Indexing for data models with constraints and classes.
J. Computer and System Sciences 52, 589–612, 1996.
[Introduced the first B⊃2-point catalog
structure for interval stabbing, which is much more complex
than the one in Arge et al. 1999.]
Edward M. McCreight.
Priority search trees.
SIAM J. Computing 14(2):257–276, 1985.
Sairam Subramanian and Sridhar Ramaswamy.
The P-range tree: A new data structure for range searching in
secondary memory.
Proc. 6th Annual ACM-SIAM Symposium on Discrete Algorithms
378–387, 1995.
[Describes a linear-size data structure that answers
3-sided range queries in O(log_{B}n + k + log** B) I/Os,
which is perhaps the only occurrence of the doubly-iterated logarithm
ever seen in the wild. Also proves that answering 4-sided queries in
O(polylog_{B}n + k) I/Os requires
Ω(n log_{B}n/log_{B}log_{B}n) blocks.]
makeup lecture, date TBA
The van Emde Boas layout [Bender et al. 2000]
A funnel heap [Brodal Fagerberg 2002]
Cache-oblivious data structures: definitions, tall caches, van Embe Boas layout, exponential layout, funnelsort, funnel heaps, exponential-level priority queues
Michael A. Bender, Richard Cole, and Rajeev Raman.
Exponential structures for cache-oblivious algorithms.
Proc. 29th International Colloquium on Automata, Languages,
and Programming, 195–207.
Lecture Notes in Computer Science 2380, Springer, 2002.
Michael A. Bender, Erik D. Demaine, and Martin Farach-Colton.
Cache-oblivious B-trees.
Proc. 41st Annual Symposium on Foundations of Computer Science
399–409, 2000.
Michael A. Bender, Ziyang Duan, John Iacono, and Jing Wu.
A locality-preserving cache-oblivious dynamic dictionary.
Proc. 13th Annual ACM-SIAM Symposium on Discrete Algorithms
29–38, 2002.
Gerth Stølting Brodal and
Rolf Fagerberg.
Cache oblivious distribution sweeping.
Proc. 29th International Col loquium on Automata, Languages,
and Programming, 426–438.
Lecture Notes in Computer Science 2380, Springer, 2002.
Matteo Frigo,
Charles E. Leiserson,
Harald Prokop*,
Sridhar Ramachandran.
Cache-oblivious algorithms.
Proc. 40th Annual IEEE Symposium on Foundations of Computer Science
285–298, 1999.
Harald Prokop*.
Cache-Oblivious Algorithms.
Master's Thesis, Dept. Electrical Engineering and Computer Science,
Massachusetts Institute of Technology, June 1999.
Here is a woefully incomplete list of relevant topics that I did not have time to cover the liast time I taught this course. Some of these may find their way into this semester's schedule.