三圈图的距离谱半径和距离无符号拉普拉斯谱半径.pdf

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8、ålÃÎÒ.Ê.dÌŒ»˜¯K,̇SNXeµ1˜Ù̇0ãØuÐ!©ïĵ±9˜ÄãØ!ãÌVgÚâŠ.1Ù0˜ÄÚn9nã©a.1nÙ•xn‡º:nãaT(n)¥ålÌŒ»ˆ•Š!gŠÚ1nŠ4ã.1oÙ•xn‡º:nãaT(n)¥ålÃÎÒ.Ê.dÌŒ»ˆ•Š!gŠÚ1nŠ4ã.1ÊÙo(©̇(Ø,¿JÑŒ±?˜ÚïįK.TØ©kã7Ì,ë•©z80Ÿ.'''………ccc:nã¶ålÌŒ»¶ålÃÎÒ.Ê.dÌŒ»IAbstractThetheoryofgraphspectrai

9、sanactiveandimportantfieldingraphtheory,dis-tancespectraanddistancesignlesslaplacianspectraofgraphsisalsoanimportantfieldinthetheoryofgraphspectra.Inthisthesis,wemainlydiscusssomeproblemsonthedistancespectralradiianddistancesignlesslaplacianspectralradiioftricyclicgraphsonnvert

10、ex.Themaincontentsofthethesisareasfollows:Wemainlyintroducethedevelopmentofgraphtheoryandgraph-spectraltheory,theresearchbackgroundofthisthesisandsomebasicterminologiesandnotationsofgraphtheoryandgraphspectraltheoryinchapterone.Weintroducesomefundamentallemmasandtheclassificat

11、ionoftricyclicgraphsinchaptertwo.Wecharacterizetricyclicgraphswithmi