ON a - KASCH SPACES
نویسندگان
چکیده
If X is a Tychonoff space, C(X) its ring of real-valued continuous functions. In this paper, we study non-essential ideals in C(X). Let a be a infinite cardinal, then X is called a-Kasch (resp. ā-Kasch) space if given any ideal (resp. z-ideal) I with gen (I) < a then I is a non-essential ideal. We show that X is an א0-Kasch space if and only if X is an almost P -space and X is an א1-Kasch space if and only if X is a pseudocompact and almost P -space. Let CF (X) denote the socle of C(X). For a topological space X with only a finite number of isolated points, we show that X is an a-Kasch space if and only if C(X) CF (X) is an a-Kasch ring.
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