More on the girth of graphs on Weyl groups
Samy A. Youssef, S. G. Hulsurkar (1993)
Archivum Mathematicum
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The girth of graphs on Weyl groups, with no restriction on the associated root system, is determined. It is shown that the girth, when it is defined, is 3 except for at most four graphs for which it does not exceed 4.