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On decomposing a hypergraph into k connected sub-hypergraphs

Published: 12 September 2003 Publication History

Abstract

By applying the matroid partition theorem of J. Edmonds (J. Res. Nat. Bur. Standards Sect. B 69 (1965) 67) to a hypergraphic generalization of graphic matroids, due to Lorea (Cahiers Centre Etudes Rech. Oper. 17 (1975) 289), we obtain a generalization of Tutte's disjoint trees theorem for hypergraphs. As a corollary, we prove for positive integers k and q that every (kq)-edge-connected hypergraph of rank q can be decomposed into k connected sub-hypergraphs, a well-known result for q = 2. Another by-product is a connectivity-type sufficient condition for the existence of k edge-disjoint Steiner trees in a bipartite graph.

References

[1]
{1} J. Edmonds, Minimum partition of a matroid into independent sets, J. Res. Nat. Bur. Standards Sect. B 69 (1965) 67-72.
[2]
{2} J. Edmonds, Submodular functions, matroids, and certain polyhedra, in: R. Guy, H. Hanani, N. Sauer, J. Schönheim (Eds.), Combinatorial Structures and their Applications, Gordon and Breach, New York, 1970, pp. 69-87.
[3]
{3} M. Lorea, Hypergraphes et matroides, Cahiers Centre Etudes Rech. Oper. 17 (1975) 289-291.
[4]
{4} L. Lovász, A generalization of König's theorem, Acta. Math. Acad. Sci. Hungar. 21 (1970) 443-446.
[5]
{5} W. Mader, A reduction method for edge-connectivity in graphs, Ann. Discrete Math. 3 (1978) 145-164.
[6]
{6} C.St.J.A. Nash-Williams, Decomposition of finite graphs into forests, J. London Math. Soc. 39 (1964) 12.
[7]
{7} W.T. Tutte, On the problem of decomposing a graph into n connected factors, J. London Math. Soc. 36 (1961) 221-230.

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Published In

cover image Discrete Applied Mathematics
Discrete Applied Mathematics  Volume 131, Issue 2
Submodularity
12 September 2003
299 pages

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Elsevier Science Publishers B. V.

Netherlands

Publication History

Published: 12 September 2003

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  • (2023)Edge-Disjoint Steiner Trees and Connectors in GraphsGraphs and Combinatorics10.1007/s00373-023-02621-339:2Online publication date: 16-Feb-2023
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