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ASPDAC
2006
ACM
98views Hardware» more  ASPDAC 2006»
15 years 5 months ago
Timing-driven placement based on monotone cell ordering constraints
− In this paper, we present a new timing-driven placement algorithm, which attempts to minimize zigzags and crisscrosses on the timing-critical paths of a circuit. We observed th...
Chanseok Hwang, Massoud Pedram
ICFP
1997
ACM
15 years 4 months ago
Foundations for the Implementation of Higher-Order Subtyping
We show how to implement a calculus with higher-order subtyping and subkinding by replacing uses of implicit subsumption with explicit coercions. To ensure this can be done, a pol...
Karl Crary
APAL
2011
14 years 7 months ago
The complexity of central series in nilpotent computable groups
The terms of the upper and lower central series of a nilpotent computable group have computably enumerable Turing degree. We show that the Turing degrees of these terms are indepe...
Barbara F. Csima, Reed Solomon
WDAG
2009
Springer
195views Algorithms» more  WDAG 2009»
15 years 6 months ago
A Local 2-Approximation Algorithm for the Vertex Cover Problem
We present a distributed 2-approximation algorithm for the minimum vertex cover problem. The algorithm is deterministic, and it runs in (∆ + 1)2 synchronous communication rounds,...
Matti Åstrand, Patrik Floréen, Valent...
COMBINATORICS
2006
102views more  COMBINATORICS 2006»
14 years 12 months ago
Identifying X-Trees with Few Characters
Previous work has shown the perhaps surprising result that, for any binary phylogenetic tree T , there is a set of four characters that define T . Here we deal with the general ca...
Magnus Bordewich, Charles Semple, Mike A. Steel