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» On the bounded integer programming
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CPC
2008
66views more  CPC 2008»
15 years 2 months ago
B2[ g] Sets and a Conjecture of Schinzel and Schmidt
A set of integers A is called a B2[g] set if every integer m has at most g representations of the form m = a + a , with a a and a, a A. We obtain a new lower bound for F(g, n), t...
Javier Cilleruelo, Carlos Vinuesa
EJC
2007
15 years 2 months ago
Deterministic random walks on the integers
Jim Propp’s P-machine, also known as the ‘rotor router model’ is a simple deterministic process that simulates a random walk on a graph. Instead of distributing chips to ran...
Joshua N. Cooper, Benjamin Doerr, Joel H. Spencer,...
GECCO
2006
Springer
143views Optimization» more  GECCO 2006»
15 years 6 months ago
Hybrid search for cardinality constrained portfolio optimization
In this paper, we describe how a genetic algorithm approach added to a simulated annealing (SA) process offers a better alternative to find the mean variance frontier in the portf...
Miguel A. Gomez, Carmen X. Flores, Maria A. Osorio
COLOGNETWENTE
2009
15 years 3 months ago
Improved Strategies for Branching on General Disjunctions
Abstract Within the context of solving Mixed-Integer Linear Programs by a Branch-andCut algorithm, we propose a new strategy for branching. Computational experiments show that, on ...
Gérard Cornuéjols, Leo Liberti, Giac...
CORR
2006
Springer
69views Education» more  CORR 2006»
15 years 2 months ago
Bounds on the coefficients of the characteristic and minimal polynomials
ABSTRACT. This note presents absolute bounds on the size of the coefficients of the characteristic and minimal polynomials depending on the size of the coefficients of the associat...
Jean-Guillaume Dumas