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标题：A regular graph of girth <mml:math alttext="$6$" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mn>6</mml:mn></mml:math> and valency <mml:math alttext="$11$" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>11</mml:mn></mml:mrow></mml:math>
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作者：P. K. Wong
期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：1986
卷号：9
DOI：10.1155/S0161171286000704
出版社：Hindawi Publishing Corporation
摘要：Let f(11,6) be the number of vertices of an (11,6)-cage. By giving a regular graph of girth 6 and valency 11, we show that f(11,6)≤240. This is the best known upper bound for f(11,6).