Determinant and inverse of meet and join matrices.
Altinisik, Ercan, Tuglu, Naim, Haukkanen, Pentti (2007)
International Journal of Mathematics and Mathematical Sciences
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Altinisik, Ercan, Tuglu, Naim, Haukkanen, Pentti (2007)
International Journal of Mathematics and Mathematical Sciences
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Haukkanen, Pentti, Korkee, Ismo (2005)
International Journal of Mathematics and Mathematical Sciences
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Xin, Guoce (2011)
The Electronic Journal of Combinatorics [electronic only]
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Ishikawa, Masao, Kawamuko, Hiroyuki, Okada, Soichi (2005)
The Electronic Journal of Combinatorics [electronic only]
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Chatfield, J.A. (1978)
International Journal of Mathematics and Mathematical Sciences
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Wang, Liang-Cheng, Ma, Xiu-Fen, Liu, Li-Hong (2009)
JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]
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Shaofang Hong, Qi Sun (2004)
Czechoslovak Mathematical Journal
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Let be a finite subset of a partially ordered set . Let be an incidence function of . Let denote the matrix having evaluated at the meet of and as its -entry and denote the matrix having evaluated at the join of and as its -entry. The set is said to be meet-closed if for all . In this paper we get explicit combinatorial formulas for the determinants of matrices and on any meet-closed set . We also obtain necessary and sufficient conditions for...
Ovall, Jeffrey S. (2004)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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Jean-Charles Régin, Michel Rueher (2005)
RAIRO - Operations Research - Recherche Opérationnelle
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This paper introduces a new method to prune the domains of the variables in constrained optimization problems where the objective function is defined by a sum , and where the integer variables are subject to difference constraints of the form . An important application area where such problems occur is deterministic scheduling with the mean flow time as optimality criteria. This new constraint is also more general than a sum constraint defined on a set of ordered variables. Classical...