Kragujevac J. Math. 22 (2000) 49-56.
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ELEMENTARY PROOF OF THE REALITY
OF THE ZEROS OF b-POLYNOMIALS OF COMPLETE GRAPHS
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Xueliang Lia
and Ivan Gutmanb
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aDepartment of Applied Mathematics,
Northwestern Polytechnical University,
X'ian, Shaanxi 710072, P. R. China, and bFaculty of Science, P. O. Box 60, 34000 Kragujevac, Yugoslavia |
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(Received January 3, 2000) |
ABSTRACT. An elementary proof is given for the reality of all zeros of b-polynomials associated with complete graphs.