ON A METRIC PROPERTY OF PERFECT COLORINGS

被引:0
|
作者
Taranenko, A. A. [1 ]
机构
[1] Sobolev Inst Math, 4 Koptyuga Ave, Novosibirsk 630090, Russia
关键词
perfect coloring; perfect structure; L-1; distance; circulant graph; square grid; triangular grid;
D O I
10.33048/semi.2021.18.046
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Given a perfect coloring of a graph, we prove that the L-1 distance between two rows of the adjacency matrix of the graph is not less than the L-1 distance between the corresponding rows of the parameter matrix of the coloring. With the help of an algebraic approach, we deduce corollaries of this result for perfect 2-colorings and perfect colorings in distance-l graphs and distance-regular graphs. We also provide examples of infinite graphs, where the obtained property rejects several putative parameter matrices of perfect colorings.
引用
收藏
页码:640 / 646
页数:7
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