ISOMORPHISMS AND AUTOMORPHISMS OF GRAPH COVERINGS

被引：32

作者：

HOFMEISTER, M

机构：

[1] Mathematisches Institut, Universität zu Köln, Köln

来源：

DISCRETE MATHEMATICS | 1991年 / 98卷 / 03期

关键词：

D O I：

10.1016/0012-365X(91)90374-B

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

Any group of automorphisms of a graph G induces a notion of isomorphism between covering projections onto G. Liftings of automorphisms of G are considered, and the isomorphism classes of covering projections onto G are classified by means of permutation voltage assignments. In the case of trivial automorphisms of the base graph, a counting formula is given.

引用

页码：175 / 183

页数：9

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