Let be a commutative ring with identity and an ideal of . is said to be - if for every element there is an idempotent such that is a unit and belongs to . A filter of ideals, say , of is if for each there is a finitely generated ideal such that . We characterize -clean rings for the ideals , , , and , in terms of the frame of multiplicative Noetherian filters of ideals of , as well as in terms of more classical ring properties.
Hewitt [Rings of real-valued continuous functions. I., Trans. Amer. Math. Soc. 64 (1948), 45–99] defined the -topology on , denoted , and demonstrated that certain topological properties of could be characterized by certain topological properties of . For example, he showed that is pseudocompact if and only if is a metrizable space; in this case the -topology is precisely the topology of uniform convergence. What is interesting with regards to the -topology is that it is possible, with...
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