A class of upper-embeddable graphs
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F. Jaeger; C. Payan; N. H. Xuong
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Article
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1979
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John Wiley and Sons
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English
β 202 KB
## Abstract In this paper, we prove the following result: Every graph obtained by connecting (with any number of edges) two vertexβdisjoint upperβembeddable graphs graphs with even Betti number is upperβembeddable.