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On a generalization of perfect $b$ -matching

Ľubica Šándorová; Marián Trenkler — 1991

Mathematica Bohemica

The paper is concerned with the existence of non-negative or positive solutions to $A f = β$ , where $A$ is the vertex-edge incidence matrix of an undirected graph. The paper gives necessary and sufficient conditions for the existence of such a solution.

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On a generalization of perfect b -matching

On a generalization of perfect $b$ -matching