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APLAS
2009
ACM
13 years 11 months ago
Branching Bisimilarity between Finite-State Systems and BPA or Normed BPP Is Polynomial-Time Decidable
In this paper we present polynomial time algorithms deciding branching bisimilarity between finite-state systems and several classes of infinite-state systems: BPA and normed BPP...
Hongfei Fu
DM
2010
77views more  DM 2010»
13 years 6 months ago
Hall-Littlewood polynomials and fixed point enumeration
We resolve affirmatively some conjectures of Reiner, Stanton, and White [6] regarding enumeration of various classes of matrices which are invariant under certain cyclic row and co...
Brendon Rhoades
FOCS
2007
IEEE
14 years 1 months ago
Parameterized Proof Complexity
We propose a proof-theoretic approach for gaining evidence that certain parameterized problems are not fixedparameter tractable. We consider proofs that witness that a given prop...
Stefan S. Dantchev, Barnaby Martin, Stefan Szeider
ECCC
2007
90views more  ECCC 2007»
13 years 6 months ago
Parameterized Proof Complexity: a Complexity Gap for Parameterized Tree-like Resolution
We propose a proof-theoretic approach for gaining evidence that certain parameterized problems are not fixed-parameter tractable. We consider proofs that witness that a given pro...
Stefan S. Dantchev, Barnaby Martin, Stefan Szeider
JCT
2007
94views more  JCT 2007»
13 years 6 months ago
A zero-free interval for flow polynomials of cubic graphs
Let P(G,t) and F(G,t) denote the chromatic and flow polynomials of a graph G. D.R. Woodall has shown that, if G is a plane triangulation, then the only zeros of P(G,t) in (−∞...
Bill Jackson