Degree of vertices and number of edges in a mixed graph

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Abdelkadir Muzey Mohammed
Department of Mathematics, Mekelle University, P.O. Box: 2040, Mekelle, Ethiopia.
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References

Rosen KH (2007). Discrete Mathematics and Its Applications ,McGraw-Hill, New York.

Sotskov YN, Tanaev VS (1976). Chromatic polynomial of a mixed graph, Vestsi Akademii Navuk BSSR, Seriya Fiz.-Mat Navuk 6:20-23 (in Russian).

This article is published under the terms of the Creative Commons Attribution License 4.0

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