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» Some counting problems related to permutation groups
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ICALP
2007
Springer
15 years 5 months ago
Affine Systems of Equations and Counting Infinitary Logic
We study the definability of constraint satisfaction problems (CSP) in various fixed-point and infinitary logics. We show that testing the solvability of systems of equations over...
Albert Atserias, Andrei A. Bulatov, Anuj Dawar
COMBINATORICS
2006
115views more  COMBINATORICS 2006»
15 years 1 months ago
Chains, Subwords, and Fillings: Strong Equivalence of Three Definitions of the Bruhat Order
Let Sn be the group of permutations of [n] = {1, . . . , n}. The Bruhat order on Sn is a partial order relation, for which there are several equivalent definitions. Three well-kno...
Catalin Zara
FOCS
1992
IEEE
15 years 5 months ago
Computing in Solvable Matrix Groups
We announce methods for e cient management of solvable matrix groups over nite elds. We show that solvability and nilpotence can be tested in polynomial-time. Such e ciency seems ...
Eugene M. Luks
NIPS
2008
15 years 2 months ago
Inferring rankings under constrained sensing
Motivated by applications like elections, web-page ranking, revenue maximization etc., we consider the question of inferring popular rankings using constrained data. More specific...
Srikanth Jagabathula, Devavrat Shah
WWW
2008
ACM
16 years 2 months ago
Size matters: word count as a measure of quality on wikipedia
Wikipedia, "the free encyclopedia", now contains over two million English articles, and is widely regarded as a highquality, authoritative encyclopedia. Some Wikipedia a...
Joshua E. Blumenstock