Results 191 to 200 of about 4,538 (218)
Lorentzian bordisms in algebraic quantum field theory. [PDF]
Lett Math PhysBunk S, MacManus J, Schenkel A.
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Journal of Algorithms, 1999 This article presents an algorithm which computes the dimension of an arbitrary finite poset (partial order set). This algorithm is based on the chromatic number of a graph instead of the classical approach based on the chromatic number of some ...
Javier Yanez, Javier Montero
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Groups of linear isometries on poset structures
Discrete Mathematics, 2008 Let V be an n-dimensional vector space over a finite field Fq and P={1,2,…,n} a poset. We consider on V the poset-metric dP. In this paper, we give a complete description of groups of linear isometries of the metric space (V,dP), for any poset-metric ...
Luciano Pánek +2 more
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Wilcox posets and parallelism in posets
Asian-European Journal of Mathematics, 2015In this paper, we have shown that any complemented modular poset of finite length can be reduced to a weakly modular [Formula: see text]-symmetric poset called Wilcox poset. The concept of parallelism has been generalized to posets. The properties of singular elements, modularity and parallelism are studied in a Wilcox poset.
Shewale, R. S., Kharat, Vilas
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Mathematical Logic Quarterly, 1992
AbstractIn this paper we give new criterions for left distributive posets to have neatest representations. We also illustrate a construction that would embed left distributive posets into representable semilattices.
Yungchen Cheng, Paula Kemp
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AbstractIn this paper we give new criterions for left distributive posets to have neatest representations. We also illustrate a construction that would embed left distributive posets into representable semilattices.
Yungchen Cheng, Paula Kemp
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Order, 2005
The authors introduce the notion of homomorphism and of a congruence relation for arbitrary partially ordered set (poset). Let \(P\) be a poset and \(Q\) a subposet of \(P\). Then \(Q\) is said to be an \(l\)-subposet of \(P\) if the identity map \(Q\to P\) is a homomorphism.
Alfonz Haviar, Judita Lihová
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The authors introduce the notion of homomorphism and of a congruence relation for arbitrary partially ordered set (poset). Let \(P\) be a poset and \(Q\) a subposet of \(P\). Then \(Q\) is said to be an \(l\)-subposet of \(P\) if the identity map \(Q\to P\) is a homomorphism.
Alfonz Haviar, Judita Lihová
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Order, 2008
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Chinese Annals of Mathematics, Series B, 2015
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Zhang, Wenfeng, Xu, Xiaoquan
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Zhang, Wenfeng, Xu, Xiaoquan
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Order, 2016
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Combinatorica, 2010
The main object of the paper is the following operation on trees. Let \(G_2\) be a tree and \(x\) and \(y\) be its vertices such that all interior points of the path \(xy\) (if they exist) have degree \(2\) in \(G_2\). The generalized tree shift (GTS) of \(G_2\) is the tree \(G_1\) obtained from \(G_2\) as follows: let \(z\) be the neighbour of \(y ...
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The main object of the paper is the following operation on trees. Let \(G_2\) be a tree and \(x\) and \(y\) be its vertices such that all interior points of the path \(xy\) (if they exist) have degree \(2\) in \(G_2\). The generalized tree shift (GTS) of \(G_2\) is the tree \(G_1\) obtained from \(G_2\) as follows: let \(z\) be the neighbour of \(y ...
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