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ISAAC
2007
Springer
14 years 1 months ago
2007
Springer
Abstract. CrossingNumber is one of the most challenging algorithmic problems in topological graph theory, with applications to graph drawing and VLSI layout. No polynomial time con...
APPROX
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. In this paper we introduce a new technique for approximation schemes for geometrical optimization problems. As an example problem, we consider the following variant of th...
APPROX
2009
Springer
14 years 2 months ago
2009
Springer
We obtain a polynomial time approximation scheme for the terrain guarding problem improving upon several recent constant factor approximations. Our algorithm is a local search algo...
FSTTCS
2003
Springer
14 years 23 days ago
2003
Springer
Recently, Jain, Mahdian and Saberi [5] had given a FPTAS for the problem of computing a market equilibrium in the Arrow-Debreu setting, when the utilities are linear functions. The...
RECOMB
1997
Springer
13 years 11 months ago
1997
Springer
We present a new polynomial time approximation scheme (PTAS) for tree alignment, which is an important variant of multiple sequence alignment. As in the existing PTASs in the liter...