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STOC
2012
ACM
193views Algorithms» more  STOC 2012»
11 years 6 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 4 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 8 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 9 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 9 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
13 years 10 months 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 3 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