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    JCT
    2008
    44views more  JCT 2008»
    Quasi-isometries between graphs and trees
    14 years 24 days ago
    Quasi-isometries between graphs and trees
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    Bernhard Krön, Rögnvaldur G. Möller
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    JCT
    2008
    85views more  JCT 2008»
    Smith normal form and Laplacians
    14 years 24 days ago
    Smith normal form and Laplacians
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    Let M denote the Laplacian matrix of a graph G. Associated with G is a finite group (G), obtained from the Smith normal form of M, and whose order is the number of spanning trees o...
    Dino J. Lorenzini
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    JCT
    2008
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    Minimally non-Pfaffian graphs
    14 years 24 days ago
    Minimally non-Pfaffian graphs
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    We consider the question of characterizing Pfaffian graphs. We exhibit an infinite family of non-Pfaffian graphs minimal with respect to the matching minor relation. This is in sha...
    Serguei Norine, Robin Thomas
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    JCT
    2008
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    Bruhat order, smooth Schubert varieties, and hyperplane arrangements
    14 years 24 days ago
    Bruhat order, smooth Schubert varieties, and hyperplane arrangements
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    The aim of this article is to link Schubert varieties in the flag manifold with hyperplane arrangements. For a permutation, we construct a certain graphical hyperplane arrangement....
    Suho Oh, Alexander Postnikov, Hwanchul Yoo
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    JCT
    2008
    67views more  JCT 2008»
    A lower bound for the length of a partial transversal in a Latin square
    14 years 24 days ago
    A lower bound for the length of a partial transversal in a Latin square
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    Pooya Hatami, Peter W. Shor
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    JCT
    2008
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    Semi-regular relative difference sets with large forbidden subgroups
    14 years 24 days ago
    Semi-regular relative difference sets with large forbidden subgroups
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    Tao Feng, Qing Xiang
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    JCT
    2008
    132views more  JCT 2008»
    The absolute order on the symmetric group, constructible partially ordered sets and Cohen-Macaulay complexes
    14 years 24 days ago
    The absolute order on the symmetric group, constructible partially ordered sets and Cohen-Macaulay complexes
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    The absolute order is a natural partial order on a Coxeter group W. It can be viewed as an analogue of the weak order on W in which the role of the generating set of simple reflec...
    Christos A. Athanasiadis, Myrto Kallipoliti
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    JCT
    2008
    53views more  JCT 2008»
    Exact sequences for the homology of the matching complex
    14 years 24 days ago
    Exact sequences for the homology of the matching complex
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    Jakob Jonsson
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    JCT
    2008
    83views more  JCT 2008»
    Bounds on degrees of p-adic separating polynomials
    14 years 24 days ago
    Bounds on degrees of p-adic separating polynomials
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    We study a discrete optimization problem introduced by Babai, Frankl, Kutin, and Stefankovic (2001), which provides bounds on degrees of polynomials with p-adically controlled beh...
    Daniel J. Katz, Joshua Zahl
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    JCT
    2008
    68views more  JCT 2008»
    Pseudo 2-factor isomorphic regular bipartite graphs
    14 years 24 days ago
    Pseudo 2-factor isomorphic regular bipartite graphs
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    A graph is pseudo 2
    Marien Abreu, A. A. Diwan, Bill Jackson, Domenico ...
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