On Zero-Sum and Almost Zero-Sum Subgraphs Over $${mathbb {Z}}$$Z
On Zero-Sum and Almost Zero-Sum Subgraphs Over $${mathbb {Z}}$$Z
复制标题
关于 $${mathbb {Z}}$$Z 上的零和和几乎零和子图
DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
R. Yuster
中科院分区:
文献类型:
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作者:
Y. Caro;R. Yuster
For a graph $$H$$H with at most $$n$$n vertices and a weighing of the edges of $$K_n$$Kn with integers, we seek a copy of $$H$$H in $$K_n$$Kn whose weight is minimal, possibly even zero. Of a particular interest are the cases where $$H$$H is a spanning subgraph (or an almost spanning subgraph) and the case where $$H$$H is a fixed graph. In particular, we show that relatively balanced weighings of $$K_n$$Kn with $${-r,ldots ,r}$${-r,…,r} guarantee almost zero-sum copies of spanning graphs with small maximum degree, guarantee zero-sum almost $$H$$H-factors, and guarantee zero-sum copies of certain fixed graphs.