Remote points and the like in pointfree topology |
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Authors: | T Dube |
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Institution: | (1) Department of Mathematical Sciences, University of South Africa, P.O. Box 392, 0003 Unisa, South Africa |
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Abstract: | A point p of β, where X is a Tychonoff space, is called a remote point if for any nowhere dense D ⊆, X, p ∉ clβx
D. A subset S of X is called round if whenever the closure in βX of a zero-set of X contains S, then it is a neighborhood of S. The purpose of this paper is to study these notions in the pointfree context. In the process, we introduce N-homomorphisms
and show how the Stone extension of an N-homomorphism transfers remote points back and forth.
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Keywords: | and phrases" target="_blank"> and phrases frame frame homomorphism remote point round quotient nowhere dense quotient |
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