Common idempotents in compact left topological left semirings

Details Common idempotents in compact left topological left semirings Common idempotents in compact left topological left semirings

2010-02-08

arxiv.org/abs/1002.1599v1

Mathematics

General Topology

Slides of my talk at International Conference on Analysis and Applications, January 24--26, Muscat, Oman. The results were ann

Scientific paper

A classical result of topological algebra states that any compact left topological semigroup has an idempotent. We refine this by showing that any compact left topological left semiring has a common, i.e. additive and multiplicative simultaneously, idempotent. As an application, we partially answer a question related to algebraic properties of ultrafilters over natural numbers. Finally, we observe that similar arguments establish the existence of common idempotents in much more general, non-associative universal algebras.

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