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Classes of Commutative Clean Rings

Wolf IberkleidWarren Wm. McGovern — 2010

Annales de la faculté des sciences de Toulouse Mathématiques

Let A be a commutative ring with identity and I an ideal of A . A is said to be I - c l e a n if for every element a A there is an idempotent e = e 2 A such that a - e is a unit and a e belongs to I . A filter of ideals, say , of A is if for each I there is a finitely generated ideal J such that J I . We characterize I -clean rings for the ideals 0 , n ( A ) , J ( A ) , and A , in terms of the frame of multiplicative Noetherian filters of ideals of A , as well as in terms of more classical ring properties.

The regular topology on C ( X )

Wolf IberkleidRamiro Lafuente-RodriguezWarren Wm. McGovern — 2011

Commentationes Mathematicae Universitatis Carolinae

Hewitt [Rings of real-valued continuous functions. I., Trans. Amer. Math. Soc. 64 (1948), 45–99] defined the m -topology on C ( X ) , denoted C m ( X ) , and demonstrated that certain topological properties of X could be characterized by certain topological properties of C m ( X ) . For example, he showed that X is pseudocompact if and only if C m ( X ) is a metrizable space; in this case the m -topology is precisely the topology of uniform convergence. What is interesting with regards to the m -topology is that it is possible, with...

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