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MLQ
2002
75views more  MLQ 2002»
13 years 7 months ago
Recursive Approximability of Real Numbers
A real number is recursively approximable if there is a computable sequence of rational numbers converging to it. If some extra condition to the convergence is added, then the limi...
Xizhong Zheng
ISAAC
2007
Springer
124views Algorithms» more  ISAAC 2007»
14 years 1 months ago
Approximating the Crossing Number of Toroidal Graphs
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...
Petr Hlinený, Gelasio Salazar
FFA
2008
82views more  FFA 2008»
13 years 7 months ago
Asymptotic behavior of the number of solutions for non-Archimedean Diophantine approximations with restricted denominators
We consider metric results for the asymptotic behavior of the number of solutions of Diophantine approximation inequalities with restricted denominators for Laurent formal power s...
Valérie Berthé, Hitoshi Nakada, Rie ...
CORR
2006
Springer
80views Education» more  CORR 2006»
13 years 7 months ago
A polynomial-time approximation algorithm for the number of k-matchings in bipartite graphs
We show that the number of k-matching in a given undirected graph G is equal to the number of perfect matching of the corresponding graph Gk on an even number of vertices divided ...
Shmuel Friedland, Daniel Levy
SIAMDM
2000
159views more  SIAMDM 2000»
13 years 7 months ago
Approximating Fractional Multicommodity Flow Independent of the Number of Commodities
Abstract. We describe fully polynomial time approximation schemes for various multicommodity flow problems in graphs with m edges and n vertices. We present the first approximation...
Lisa Fleischer