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» Fixed-Point Definability and Polynomial Time
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STOC
2004
ACM
150views Algorithms» more  STOC 2004»
14 years 9 months ago
Typical properties of winners and losers in discrete optimization
We present a probabilistic analysis for a large class of combinatorial optimization problems containing, e.g., all binary optimization problems defined by linear constraints and a...
René Beier, Berthold Vöcking
WABI
2005
Springer
132views Bioinformatics» more  WABI 2005»
14 years 2 months ago
Perfect Sorting by Reversals Is Not Always Difficult
—We propose new algorithms for computing pairwise rearrangement scenarios that conserve the combinatorial structure of genomes. More precisely, we investigate the problem of sort...
Sèverine Bérard, Anne Bergeron, Cedr...
CCS
2006
ACM
14 years 16 days ago
Cryptanalysis of the "Grain" family of stream ciphers
Let us have an NLFSR with the feedback function g(x) and an LFSR with the generating polynomial f(x). The function g(x) is a Boolean function on the state of the NLFSR and the LFS...
Alexander Maximov
KDD
2006
ACM
208views Data Mining» more  KDD 2006»
14 years 9 months ago
Frequent subgraph mining in outerplanar graphs
In recent years there has been an increased interest in frequent pattern discovery in large databases of graph structured objects. While the frequent connected subgraph mining pro...
Tamás Horváth, Jan Ramon, Stefan Wro...
JCT
2008
84views more  JCT 2008»
13 years 8 months ago
Minimally non-Pfaffian graphs
We consider the question of characterizing Pfaffian graphs. We exhibit an infinite family of non-Pfaffian graphs minimal with respect to the matching minor relation. This is in sha...
Serguei Norine, Robin Thomas