Results 181 to 190 of about 1,637,051 (209)
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Simple Graphs and Zero-divisor Semigroups
Algebra Colloquium, 2009In this paper, we provide examples of graphs which uniquely determine a zero-divisor semigroup. We show two classes of graphs that have no corresponding semigroups. Especially, we prove that no complete r-partite graph together with two or more end vertices (each linked to distinct vertices) has corresponding semigroups.
Wu, Tongsuo, Chen, Li
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On the zero-divisor graph of Rickart *-rings
Asian-European Journal of Mathematics, 2017In this paper, we study the zero-divisor graph of Rickart *-rings. We determine the condition on Rickart *-ring so that its zero-divisor graph contains a cut vertex. It is proved that the set of cut vertices form a complete subgraph. We characterize Rickart *-rings for which the complement of the zero-divisor graph is connected. The diameter and girth
Patil, Avinash, Waphare, B. N.
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Lobachevskii Journal of Mathematics, 2015
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Estaji, A. A. +2 more
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Estaji, A. A. +2 more
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Acta Mathematica Hungarica, 2005
As usual, let \(C(X)\) denote the ring of all real-valued continuous functions on a Tychonoff space \(X\). By the zero-divisor graph \(\Gamma (C(X))\) of \(C(X)\) we mean the graph with vertices nonzero zero-divisors of \(C(X)\) such that there is an edge between vertices \(f\), \(g\) if and only if \(f\neq g\) and \(fg=0\).
Azarpanah, F., Motamedi, M.
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As usual, let \(C(X)\) denote the ring of all real-valued continuous functions on a Tychonoff space \(X\). By the zero-divisor graph \(\Gamma (C(X))\) of \(C(X)\) we mean the graph with vertices nonzero zero-divisors of \(C(X)\) such that there is an edge between vertices \(f\), \(g\) if and only if \(f\neq g\) and \(fg=0\).
Azarpanah, F., Motamedi, M.
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2021
In this chapter, we study topological concepts like the genus of zero-divisor graphs. The prime objective of topological graph theory is to draw a graph on a surface so that no two edges cross, an intuitive geometric problem that can be enriched by specifying symmetries or combinatorial side-conditions.
David F. Anderson +3 more
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In this chapter, we study topological concepts like the genus of zero-divisor graphs. The prime objective of topological graph theory is to draw a graph on a surface so that no two edges cross, an intuitive geometric problem that can be enriched by specifying symmetries or combinatorial side-conditions.
David F. Anderson +3 more
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Zero-divisors and zero-divisor graphs of power series rings
Ricerche di Matematica, 2015zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Haouaoui, Amor, Benhissi, Ali
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The Zero-divisor Graphs of Posets and an Application to Semigroups
Graphs and Combinatorics, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dancheng Lu, Tongsuo Wu
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Exact Decompositions and Zero-Divisor Graphs
Graphs and CombinatoricszbMATH Open Web Interface contents unavailable due to conflicting licenses.
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ZERO-DIVISOR GRAPH OF AN IDEAL OF A NEAR-RING
Discrete Mathematics, Algorithms and Applications, 2013In this paper, we associate the graph ΓI(N) to an ideal I of a near-ring N. We exhibit some properties and structure of ΓI(N). For a commutative ring R, Beck conjectured that both chromatic number and clique number of the zero-divisor graph Γ(R) of R are equal. We prove that Beck's conjecture is true for ΓI(N).
T. Tamizh Chelvam, S. Nithya
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Zero Divisor Graph of a Poset with Respect to an Ideal
Order, 2011zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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