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On the Crossing Number of Circular Graphs
引用本文:TONGYIN LIU, YANPEI LIU(Dopartment of Mathematics,Northern jiaotong University,Beijing,100044). On the Crossing Number of Circular Graphs[J]. 运筹学学报, 1998, 0(4)
作者姓名:TONGYIN LIU   YANPEI LIU(Dopartment of Mathematics  Northern jiaotong University  Beijing  100044)
作者单位:Dopartment of Mathematics,Northern jiaotong University,Beijing,100044
摘    要:
1.IntroductionInVLSIchipdesign,thetwo-layerroutingofgraphGplayanimportantrole.Thatis,theupperlayercanonlybeusedforverticalwiringandthesecondlaer,theloweroneonlyforhorizontalwiring.Soweconsidertheplanarprojectionofth.etwolayers,i.e.,consideratwodimensionalgridasapropergraphmodel.ThenoneobviousconditiontoberequiredisthateveryvertexofGhasitsdegreeatmost4.Withoutlossofgeneralitylweonlyconsider4regUlargraphs.IfGisaplanargraphwitha(G)S4,alinearalgorithmhadbeenprovidedforfindingarectilineajrrout…


On the Crossing Number of Circular Graphs
TONGYIN LIU, YANPEI LIU. On the Crossing Number of Circular Graphs[J]. OR Transactions, 1998, 0(4)
Authors:TONGYIN LIU   YANPEI LIU
Abstract:
Keywords:rectilinear embedding  good drawing  crossing number  algorithm  VLSI.
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