【摘 要】
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Carvalho,Lucchesi and Murty proved that any 1-extendable graph G different from K2 and C2n has at least △(G)edge-disjoint removable ears,and any brick G distin
【机 构】
：
School of Mathematical Sciences,Xiamen University,Xiamen 361005,China
论文部分内容阅读
Carvalho,Lucchesi and Murty proved that any 1-extendable graph G different from K2 and C2n has at least △(G)edge-disjoint removable ears,and any brick G distinct from K4 and C-6 has at least △(G)-2 removable edges,where △(G)denotes the maximum degree of G.In this paper,we improve the lower bounds for numbers of removable ears and removable edges of 1-extendable graphs.It is proved that any 1-extendable graph G different from K2 and C2n has at least X’(G)edge-disjoint removable ears,and any brick G distinct from K4 and C-6 has at least X’(G)-2 removable edges,where X’(G)denotes the edge-chromatic number of G.
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