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On a conjecture concerningk-Hamilton-nice sequences
Authors:Yiping Liu  Zhengsheng Wu
Institution:(1) Department of Mathematics, Nanjing Normal University, 210024 Nanjing, China
Abstract:In this paper, we prove that a non-negative rational number sequence (a 1,a 2, ...,a k+1) isk-Hamilton-nice, if (1)a k+1le2, and (2) sgr j =1/h (i j –1)lek–1 implies 
$$\sum\nolimits_{j = 1}^h {(a_{i_j }  - 1)}  \leqslant 1$$
for arbitraryi 1,i 2,...i h epsi {1,2,... ,k}. This result was conjectured by Guantao Chen and R.H. Schelp, and it generalizes several well-known sufficient conditions for graphs to be Hamiltonian.This project is supported by the National Natural Science Foundation of China.
Keywords:Hamiltonian graph  k-Hamilton-nice  k-Hamilton-nice sequence
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