OALib Journal期刊
ISSN: 2333-9721
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平面图3可着色的充分条件
, PP. 13-18
Keywords: 平面图,圈,着色
Abstract:
证明了(1)每一个不含4-6圈,也不含距离小于2的三角形对,且每个7-圈最多与一个三面相邻的平面图是3-可着色的;(2)每一个不含4-圈和5-圈,且每个6-圈或7-圈不与长度小于8的圈有公共边的平面图是3-可着色的.
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[3] | abbotthl,zhoub.omsmallfacesin4-criticalgraphs[j].arscombin,1991,32:203-207.
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[4] | xub.on3-colorableplanegraphswithout5-and7-cyclesm[j].jcombintheryserb,2006,96:958-963.
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