This paper discusses the graceful graph of P2r,2m.Using the structure method,P2r,2m is proved to be graceful for r=13.%对P2r,2m的优美性进行探讨.采用函数构造法证明了r=13时P2r,2m是优美的.
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机译:Circulation of old Mei tu 美图Tales in Hu nan 湖南District from the late Qing Dynasty 清朝the early Period of Zhong hua min guo 中华民国-Wu mei tu 『五美图』、 Hou wu mei tu 『后五美图』、 Qi mei tu 『七美图』 -