Finite graphs and their spanning trees
Jiří Sedláček (1967)
Časopis pro pěstování matematiky
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Jiří Sedláček (1967)
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Brualdi, Richard A., Mellendorf, Stephen (1994)
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Bohdan Zelinka (1979)
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Çevik, A.Sinan, Cangül, İ.Naci (2009)
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The paper is concerned with the existence of non-negative or positive solutions to , where is the vertex-edge incidence matrix of an undirected graph. The paper gives necessary and sufficient conditions for the existence of such a solution.