New colored graphs towards a Brualdi-Hollingsworth conjecture
New colored graphs towards a Brualdi-Hollingsworth conjecture
批准号:
21740085
负责人:
SUZUKI Kazuhiro
金额:
$2.83万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Young Scientists (B)
财政年份:
2009
资助国家:
日本
项目状态:
已结题
起止时间:
2009 至 2010
中文摘要
Brualdi等人推测,一个2n-1种颜色的2n阶(>5)的适当的边着色完全图可以分解为n棵边不相交的异色生成树。我们通过定义一个f色图来推广这个猜想,通过这个图我们可以逐步研究这个猜想。特别地,我们证明了f(c)=n-2的广义猜想。此外,我们还证明了具有w个分量的f色生成森林存在的一个充分必要条件,并利用该条件推广了前面的两个结果。
英文摘要
Brualdi et al. conjectured that a properly edge-colored complete graph of order 2n(>5)with 2n-1 colors can be decomposed into n edge-disjoint heterochromatic spanning trees. We generalized this conjecture by defining an f-chromatic graph, by which we can study stepwise the conjecture. In particular, we proved the generalized conjecture with f(c)=n-2. Moreover, we proved a necessary and sufficient condition for existence of an f-chromatic spanning forest with exactly w components, and generalized two previous results by applying the condition.
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