In this paper, we first establish a useful inequality on the minimum real roots of the adjoint polynomials of the complete graphs. By using it, we investigate the chromatic uniqueness of certainâ€¦ (More)

The Wiener index W(G) of a connected graph G, introduced by Wiener in 1947, is defined as W(G)=\sum_{u,v\in V(G)}d_G(u,v) where d_G(u,v) is the distance (length a shortest path) between the verticesâ€¦ (More)

Sheng wu yi xue gong cheng xue za zhi = Journalâ€¦

2014

Mammography imaging is one of the most demanding imaging modalities from the point of view of the bal- ance between image quality (the visibility of small size and/or low contrast structures) andâ€¦ (More)

By h(G, x) and P (G, Î») we denote the adjoint polynomial and the chromatic polynomial of graph G, respectively. A new invariant of graph G, which is the fourth character R4(G), is given in thisâ€¦ (More)