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math.NT2013★ 4 cited
On the Products , II
Yong-Gao Chen, Ming-Liang Gong
In this paper, the following results are proved: (i) For any odd integer with at most two distinct prime factors and any positive integer , the product $(1^\ell+1)(2^\ell…
math.CO2013
A lower bound of the least signless Laplacian eigenvalue of a graph
Shu-Guang Guo, Yong-Gao Chen, Guanglong Yu
Let be a simple connected graph on vertices and edges. In [Linear Algebra Appl. 435 (2011) 2570-2584], Lima et al. posed the following conjecture on the least eigenvalu…