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SIAMCOMP
1998
137views more  SIAMCOMP 1998»
13 years 8 months ago
Primal-Dual RNC Approximation Algorithms for Set Cover and Covering Integer Programs
We build on the classical greedy sequential set cover algorithm, in the spirit of the primal-dual schema, to obtain simple parallel approximation algorithms for the set cover probl...
Sridhar Rajagopalan, Vijay V. Vazirani
IPL
2006
101views more  IPL 2006»
13 years 8 months ago
An efficient approximation for the Generalized Assignment Problem
We present a simple family of algorithms for solving the Generalized Assignment Problem (GAP). Our technique is based on a novel combinatorial translation of any algorithm for the...
Reuven Cohen, Liran Katzir, Danny Raz
COCOON
2001
Springer
14 years 1 months ago
Decidable Approximations on Generalized and Parameterized Discrete Timed Automata
We consider generalized discrete timed automata with general linear relations over clocks and parameterized constants as clock constraints and with parameterized durations. We look...
Zhe Dang, Oscar H. Ibarra, Richard A. Kemmerer
MOC
2002
70views more  MOC 2002»
13 years 8 months ago
Positivity preserving finite element approximation
We consider finite element operators defined on "rough" functions in a bounded polyhedron in RN . Insisting on preserving positivity in the approximations, we discover a...
Ricardo H. Nochetto, Lars B. Wahlbin
MOC
2002
72views more  MOC 2002»
13 years 8 months ago
Long-term stability of variable stepsize approximations of semigroups
This paper is concerned with the stability of rational one-step approximations of C0 semigroups. Particular emphasis is laid on long-term stability bounds. The analysis is based on...
Nikolai Bakaev, Alexander Ostermann