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Complete $r$-partite zero-divisor graphs and coloring of commutative semigroups

Hamid Reza Maimani·Mojgan Mogharrab·Siamak Yassemi
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Abstract

For a commutative semigroup $S$ with 0, the zero-divisor graph of $S$ denoted by $Γ(S)$ is the graph whose vertices are nonzero zero-divisor of $S$, and two vertices $x$, $y$ are adjacent in case $xy=0$ in $S$. In this paper we study the case where the graph $Γ(S)$ is complete $r$-partite for a positive integer $r$. Also we study the commutative semigroups which are finitely colorable.

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Hamid Reza Maimani, Mojgan Mogharrab, Siamak Yassemi. 2007-01-23. Complete $r$-partite zero-divisor graphs and coloring of commutative semigroups. https://arxiv.org/abs/math/0701627

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