Volume 7, Issue 1
مرور بر اساس
ارسال های اخیر
-
Majorization and the number of bipartite graphs for given vertex degrees
(University of Isfahan, 2018-03-01)The emph{bipartite realisation problem} asks for a pair of non-negative, non-increasing integer lists $a:=(a_1,ldots,a_n)$ and $b:=(b_1,ldots,b_{n'})$ if there is a labeled bipartite graph $G(U,V,E)$ (no loops or multiple ...
-
Products of graphs and Nordhaus-Gaddum type inequalities for eigenvalues
(University of Isfahan, 2018-03-01)In this paper, we obtain $alpha$ as coefficient for the $G=K_{alpha n} cup overline{K_{(1-alpha)n}}$ and by which we discuss Nikiforov's conjecture for $lambda_{1}$ and Aouchiche and Hansen's conjecture for $q_1$ in ...
-
PD-sets for codes related to flag-transitive symmetric designs
(University of Isfahan, 2018-03-01)For any prime $p$ let $C_p(G)$ be the $p$-ary code spanned by the rows of the incidence matrix $G$ of a graph $Gamma$. Let $Gamma$ be the incidence graph of a flag-transitive symmetric design $D$. We show that any ...
-
New class of integral bipartite graphs with large diameter
(University of Isfahan, 2018-03-01)In this paper, we construct a new class of integral bipartite graphs (not necessarily trees) with large even diameters. In fact, for every finite set $A$ of positive integers of size $k$ we construct an integral ...
-
Annihilating submodule graph for modules
(University of Isfahan, 2018-03-01)Let $R$ be a commutative ring and $M$ an $R$-module. In this article, we introduce a new generalization of the annihilating-ideal graph of commutative rings to modules. The annihilating submodule graph of $M$, ...
