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» The Complexity of Symmetry-Breaking Formulas
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JCT
2007
83views more  JCT 2007»
15 years 6 months ago
A finiteness theorem for Markov bases of hierarchical models
We show that the complexity of the Markov bases of multidimensional tables stabilizes eventually if a single table dimension is allowed to vary. In particular, if this table dimen...
Serkan Hosten, Seth Sullivant
MOC
2000
91views more  MOC 2000»
15 years 6 months ago
A parallel method for time-discretization of parabolic problems based on contour integral representation and quadrature
We treat the time discretization of an initial-value problem for a ous abstract parabolic equation by first using a representation of the solution as an integral along the boundary...
Dongwoo Sheen, Ian H. Sloan, Vidar Thomée
STACS
2010
Springer
16 years 1 months ago
Branching-time Model Checking of One-counter Processes
One-counter processes (OCPs) are pushdown processes which operate only on a unary stack alphabet. We study the computational complexity of model checking computation tree logic (CT...
Stefan Göller, Markus Lohrey
STOC
2006
ACM
121views Algorithms» more  STOC 2006»
16 years 7 months ago
Narrow proofs may be spacious: separating space and width in resolution
The width of a resolution proof is the maximal number of literals in any clause of the proof. The space of a proof is the maximal number of clauses kept in memory simultaneously if...
Jakob Nordström
FOCS
2008
IEEE
16 years 1 months ago
Hardness of Minimizing and Learning DNF Expressions
We study the problem of finding the minimum size DNF formula for a function f : {0, 1}d → {0, 1} given its truth table. We show that unless NP ⊆ DTIME(npoly(log n) ), there i...
Subhash Khot, Rishi Saket