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» Alternating Timed Automata over Bounded Time
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ICFP
2004
ACM
14 years 9 months ago
Numbering matters: first-order canonical forms for second-order recursive types
We study a type system equipped with universal types and equirecursive types, which we refer to as F?. We show that type equality may be decided in time O(n log n), an improvement...
François Pottier, Nadji Gauthier
ISAAC
2000
Springer
135views Algorithms» more  ISAAC 2000»
14 years 18 days ago
On Approximating Minimum Vertex Cover for Graphs with Perfect Matching
It has been a challenging open problem whether there is a polynomial time approximation algorithm for the Vertex Cover problem whose approximation ratio is bounded by a constant l...
Jianer Chen, Iyad A. Kanj
CPAIOR
2008
Springer
13 years 10 months ago
Leveraging Belief Propagation, Backtrack Search, and Statistics for Model Counting
We consider the problem of estimating the model count (number of solutions) of Boolean formulas, and present two techniques that compute estimates of these counts, as well as eith...
Lukas Kroc, Ashish Sabharwal, Bart Selman
TCS
2008
13 years 9 months ago
Expanders and time-restricted branching programs
The replication number of a branching program is the minimum number R such that along every accepting computation at most R variables are tested more than once; the sets of variab...
Stasys Jukna
ATS
2000
IEEE
134views Hardware» more  ATS 2000»
14 years 1 months ago
Fsimac: a fault simulator for asynchronous sequential circuits
At very high frequencies, the major potential of asynchronous circuits is absence of clock skew and, through that, better exploitation of relative timing relations. This paper pre...
Susmita Sur-Kolay, Marly Roncken, Ken S. Stevens, ...