<P><B>Abstract</B></P><P>For a distance-regular graph with second largest eigenvalue (resp., smallest eigenvalue) <SUB>θ1</SUB> (resp., <SUB>θD</SUB>) we show that (<SUB>θ1&...
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https://www.riss.kr/link?id=A107624855
2011
-
SCI,SCIE,SCOPUS
학술저널
2404-2412(9쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P><P>For a distance-regular graph with second largest eigenvalue (resp., smallest eigenvalue) <SUB>θ1</SUB> (resp., <SUB>θD</SUB>) we show that (<SUB>θ1&...
<P><B>Abstract</B></P><P>For a distance-regular graph with second largest eigenvalue (resp., smallest eigenvalue) <SUB>θ1</SUB> (resp., <SUB>θD</SUB>) we show that (<SUB>θ1</SUB>+1)(<SUB>θD</SUB>+1)⩽-<SUB>b1</SUB> holds, where equality only holds when the diameter equals two. Using this inequality we study distance-regular graphs with fixed second largest eigenvalue.</P>