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Multiplicative Automorphisms of Incidence Algebras |
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| Authors: | Rosali Brusamarello Érica Z. Fornaroli |
| Affiliation: | Departamento de Matemática , Universidade Estadual de Maringá , Maringá , Brazil |
| Abstract: | We present necessary and sufficient conditions for a multiplicative automorphism of an incidence algebra of a finite partially ordered set X to be an inner automorphism. These conditions are related to the structure of X as a directed graph. |
| Keywords: | Automorphisms Directed graphs Incidence algebras |