Generalized Rotation numbers
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Robin J. Chapman; Julie Haviland
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Article
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1993
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John Wiley and Sons
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English
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## Abstract A __rooted graph__ is a pair (__G,x__), where __G__ is a simple undirected graph and __x__ โ __V__(__G__). If __G__ is rooted at __x__, its k__th rotation number h~k~__ (__G,x__) is the minimum number of edges in a graph __F__ of order |__G__| + __k__ such that for every __v__ โ __V__(_