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STOC
2012
ACM
193views Algorithms» more  STOC 2012»
11 years 8 months ago
A new point of NP-hardness for unique games
d abstract; full version begins on page 13) Ryan O’Donnell∗ John Wright† November 2, 2011 We show that distinguishing 1 2 -satisfiable Unique-Games instances from (3 8 + )-...
Ryan O'Donnell, John Wright
ESA
2011
Springer
269views Algorithms» more  ESA 2011»
12 years 6 months ago
Alphabet-Independent Compressed Text Indexing
Self-indexes can represent a text in asymptotically optimal space under the k-th order entropy model, give access to text substrings, and support indexed pattern searches. Their ti...
Djamal Belazzougui, Gonzalo Navarro
IFIPTCS
2000
13 years 9 months ago
An Index for Two Dimensional String Matching Allowing Rotations
We present an index to search a two-dimensional pattern of size m m in a two-dimensional text of size n n, even when the pattern appears rotated in the text. The index is based on ...
Kimmo Fredriksson, Gonzalo Navarro, Esko Ukkonen
STACS
2005
Springer
13 years 11 months ago
Improving the Alphabet-Size in High Noise, Almost Optimal Rate List Decodable Codes
We revisit the construction of high noise, almost optimal rate list decodable code of Guruswami [1]. Guruswami showed that if one can explicitly construct optimal extractors then o...
Eran Rom, Amnon Ta-Shma
CPM
2005
Springer
123views Combinatorics» more  CPM 2005»
13 years 11 months ago
A Simple Fast Hybrid Pattern-Matching Algorithm
Abstract. The Knuth-Morris-Pratt (KMP) pattern-matching algorithm guarantees both independence from alphabet size and worst-case execution time linear in the pattern length; on the...
Frantisek Franek, Christopher G. Jennings, William...
GLOBECOM
2008
IEEE
14 years 21 days ago
Noise Thresholds for Discrete LDPC Decoding Mappings
— For decoding low-density parity-check (LDPC) codes on discrete memoryless channels, a method to quantize messages and to find message-passing decoding functions for the variab...
Brian M. Kurkoski, Kazuhiko Yamaguchi, Kingo Kobay...
DCC
2008
IEEE
14 years 5 months ago
A Simple Algorithm for Computing the Lempel Ziv Factorization
We give a space-efficient simple algorithm for computing the Lempel?Ziv factorization of a string. For a string of length n over an integer alphabet, it runs in O(n) time independ...
Maxime Crochemore, Lucian Ilie, W. F. Smyth