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r168。ome gef168。uhrt wird[J]. Ann Phys Chem, 1847,72:497–508.[3] Krivelevich M, Sudakov B. Pseudorandom graphs[J]. More sets, graphs and numbers. Bolyai Society Mathematical Studies, 2006,vol 15: 199–262.[4] van Dam E, Haemers W. Which graphs are determined by their spectrum?[J]. Lin Algebra Appl, 2003,373:241–272.[5] van Dam E, Haemers W. Developments on spectral characterization of graphs[J]. Discrete Math, 2009,309:576–586.[6] Cvetkovi180。c D, Doob M, Sachs H. Spectra of graphs – theory and application[J]. Academic, New York, 3rd edn, 1995.[7] Cvetkovi180。c D, Rowlinson P, Simic S. Eigenspaces of graphs[M]. Cambridge University Press: Cambridge,1997.[8] Mohar B. Some applications of Laplace eigenvalues of graphs[M]. Hahn G, Sabidussi G (eds) Graph symmetry: Kluwer, Dordrecht,1997,225–275.[9] Godsil CD, Royle G. Algebraic graph theory[M]. Berlin:Springer,2001.[10] Chung FRK. Spectral graph theory[M]. American Mathematical Society, Providence, RI,1997.[11] ,Sinogowitz U. Spektren endlicher Grafen[J]. Abh Math Sem Univ Hamburg, : 63–77.致 謝本文是在導(dǎo)師呂大梅講師的悉心指導(dǎo)下完成的,從最初的定題到資料搜集,再到論文的寫作、修改和定稿,她都給了我細(xì)心的指導(dǎo)和耐心的幫助。她踏實(shí)的科學(xué)態(tài)度和嚴(yán)謹(jǐn)?shù)闹螌W(xué)精神及精益求精的工作作風(fēng)時(shí)刻激勵著我前進(jìn),讓我受益無窮。在此,我向她表示我最真摯的感謝與真誠的敬意。