On triangle-free projective graphs

被引:8
作者
Hazan, S [1 ]
机构
[1] INST POLITECN NACL,CTR INVEST & ESTUDIOS AVANZADOS,DEPT MATEMAT,MEXICO CITY 07000,DF,MEXICO
关键词
D O I
10.1007/BF01195494
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
The 2-projection property was introduced by Corominas for ordered sets; it was generalized to other structures and arities by Pouzet, Rosenberg and Stone and independently by Davey, McKenzie, Nation and Palfy. We investigate triangle-free projective graphs and give a characterization for graphs that satisfy a certain condition on their cycles. In those cases, projectivity is equivalent to quasiprojectivity. As a corollary, we obtain a characterization of projective orders of height 1.
引用
收藏
页码:185 / 196
页数:12
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