A conjecture of Biggs concerning the resistance of a distance-regular graph

被引:0
|
作者
Markowsky, Greg [1 ]
Koolen, Jacobus [2 ]
机构
[1] POSTECH, Pohang Math Inst, Pohang 790784, South Korea
[2] POSTECH, Dept Math, Pohang 790784, South Korea
来源
ELECTRONIC JOURNAL OF COMBINATORICS | 2010年 / 17卷 / 01期
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中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
Biggs conjectured that the resistance between any two points on a distance-regular graph of valency greater than 2 is bounded by twice the resistance between adjacent points. We prove this conjecture, give the sharp constant for the inequality, and display the graphs for which the conjecture most nearly fails. Some necessary background material is included, as well as some consequences.
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页数:15
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