The largest demigenus of a bipartite signed graph

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The largest demigenus of a bipartite signed graph

A graph with signed edges is orientation embedded in a surface when it is topologically embedded so that one trip around a closed path preserves or reverses orientation according as the path's sign product is positive or negative. We nd the smallest surface within which it is possible to orientation-embed the complete bipartite signed graph K r;s , which is obtained from the complete bipartite ...

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ژورنال

عنوان ژورنال: Discrete Mathematics

سال: 2001

ISSN: 0012-365X

DOI: 10.1016/s0012-365x(00)00349-6