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    JCT
    2008
    91views more  JCT 2008»
    A chain theorem for matroids
    13 years 11 months ago
    A chain theorem for matroids
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    Tutte's Wheels-and-Whirls Theorem proves that if M is a 3-connected matroid other than a wheel or a whirl, then M has a
    James G. Oxley, Charles Semple, Geoff Whittle
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    JCT
    2008
    84views more  JCT 2008»
    Wild triangles in 3-connected matroids
    13 years 11 months ago
    Wild triangles in 3-connected matroids
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    Let {a, b, c} be a triangle in a 3-connected matroid M. In this paper, we describe the structure of M relative to {a, b, c} when, for all t in {a, b, c}, either M\t is not 3-connec...
    James G. Oxley, Charles Semple, Geoff Whittle
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    JCT
    2008
    76views more  JCT 2008»
    Bisimplicial vertices in even-hole-free graphs
    14 years 21 days ago
    Bisimplicial vertices in even-hole-free graphs
    Download  www.columbia.edu
    Louigi Addario-Berry, Maria Chudnovsky, Fré...
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    JCT
    2008
    57views more  JCT 2008»
    k-Ordered Hamilton cycles in digraphs
    14 years 21 days ago
    k-Ordered Hamilton cycles in digraphs
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    Daniela Kühn, Deryk Osthus, Andrew Young
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    JCT
    2008
    55views more  JCT 2008»
    Packing of graphs with small product of sizes
    14 years 21 days ago
    Packing of graphs with small product of sizes
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    Alexandr V. Kostochka, Gexin Yu
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    JCT
    2008
    120views more  JCT 2008»
    Approximate min-max theorems for Steiner rooted-orientations of graphs and hypergraphs
    14 years 21 days ago
    Approximate min-max theorems for Steiner rooted-orientations of graphs and hypergraphs
    Download  www.cse.cuhk.edu.hk
    Given an undirected hypergraph and a subset of vertices S V with a specified root vertex r S, the STEINER ROOTED-ORIENTATION problem is to find an orientation of all the hypered...
    Tamás Király, Lap Chi Lau
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    JCT
    2008
    70views more  JCT 2008»
    Claw-free graphs. IV. Decomposition theorem
    14 years 21 days ago
    Claw-free graphs. IV. Decomposition theorem
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    Maria Chudnovsky, Paul D. Seymour
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    JCT
    2008
    96views more  JCT 2008»
    Graphs with full rank 3-color matrix and few 3-colorings
    14 years 21 days ago
    Graphs with full rank 3-color matrix and few 3-colorings
    Download  www.math.princeton.edu
    We exhibit a a counterexample to a conjecture of Thomassen stating that the number of distinct 3-colorings of every graph whose 3color matrix has full column rank is superpolynomi...
    Serguei Norine, Jean-Sébastien Sereni
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    JCT
    2008
    54views more  JCT 2008»
    Nowhere-zero 3-flows in triangularly connected graphs
    14 years 21 days ago
    Nowhere-zero 3-flows in triangularly connected graphs
    Download  www.math.wvu.edu
    Genghua Fan, Hong-Jian Lai, Rui Xu, Cun-Quan Zhang...
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    JCT
    2008
    74views more  JCT 2008»
    Claw-free graphs. V. Global structure
    14 years 21 days ago
    Claw-free graphs. V. Global structure
    Download  www.math.princeton.edu
    Maria Chudnovsky, Paul D. Seymour
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