Article

Acta Mathematica Hungarica

, Volume 94, Issue 1, pp 53-58

First online:

When is c(x) a Clean Ring?

  • F. AzarpanahAffiliated withDEPARTMENT OF MATHEMATICS, CHAMRAN UNIVERSITY AHVAZ

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Abstract

An element of a ring R is called clean if it is the sum of a unit and an idempotent and a subset A of R is called clean if every element of A is clean. A topological characterization of clean elements of C(X) is given and it is shown that C(X) is clean if and only if X is strongly zero-dimensional, if and only if there exists a clean prime ideal in C(X). We will also characterize topological spaces X for which the ideal CK(X) is clean. Whenever X is locally compact, it is shown that CK(X) is clean if and only if X is zero-dimensional.

clean ring clean ideal zero-dimensional strongly zero-dimensional