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CORR
2002
Springer
102views Education» more  CORR 2002»
13 years 9 months ago
Tight Approximation Results for General Covering Integer Programs
In this paper we study approximation algorithms for solving a general covering integer program. An
Stavros G. Kolliopoulos, Neal E. Young
TCS
2002
13 years 9 months ago
MAX3SAT is exponentially hard to approximate if NP has positive dimension
Under the hypothesis that NP has positive p-dimension, we prove that any approximation algorithm A for MAX3SAT must satisfy at least one of the following:
John M. Hitchcock
WEA
2007
Springer
111views Algorithms» more  WEA 2007»
14 years 3 months ago
Vertex Cover Approximations on Random Graphs
Abstract. The vertex cover problem is a classical NP-complete problem for which the best worst-case approximation ratio is 2− o(1). In this paper, we use a collection of simple g...
Eyjolfur Asgeirsson, Clifford Stein
CAGD
2006
90views more  CAGD 2006»
13 years 9 months ago
Local hybrid approximation for scattered data fitting with bivariate splines
We suggest a local hybrid approximation scheme based on polynomials and radial basis functions, and use it to modify the scattered data fitting algorithm of [7]. Similar to that a...
Oleg Davydov, Rossana Morandi, Alessandra Sestini
STOC
1996
ACM
132views Algorithms» more  STOC 1996»
14 years 1 months ago
Approximability and Nonapproximability Results for Minimizing Total Flow Time on a Single Machine
We consider the problem of scheduling n jobs that are released over time on a single machine in order to minimize the total ow time. This problem is well-known to be NPcomplete, a...
Hans Kellerer, Thomas Tautenhahn, Gerhard J. Woegi...