Zero-divisor graphs of nilpotent-free semigroups |
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Authors: | Neil Epstein Peyman Nasehpour |
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Institution: | 1. Institut für Mathematik, Universit?t Osnabrück, 49069, Osnabrück, Germany 2. Department of Engineering Science, Faculty of Engineering, University of Tehran, Tehran, Iran
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Abstract: | We find strong relationships between the zero-divisor graphs of apparently disparate kinds of nilpotent-free semigroups by introducing the notion of an Armendariz map between such semigroups, which preserves many graph-theoretic invariants. We use it to give relationships between the zero-divisor graph of a ring, a polynomial ring, and the annihilating-ideal graph. Then we give relationships between the zero-divisor graphs of certain topological spaces (so-called pearled spaces), prime spectra, maximal spectra, tensor-product semigroups, and the semigroup of ideals under addition, obtaining surprisingly strong structure theorems relating ring-theoretic and topological properties to graph-theoretic invariants of the corresponding graphs. |
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