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Composable topological properties and semigroups of relations
Published online by Cambridge University Press: 09 April 2009
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It is assumed throughout this paper that all topological spaces under consideration are Hausdorff. Since the notion of topological property is fundamental in this paper, we begin by making it precise. For our purposes here, it is sufficient to think of a topological property Q as being a class of space such that if X ∈ Q and Y is homeomorphic to X, then Y∈Q. To say that a space X has property Q would then be equivalent to saying that X ∈ Q.
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- Copyright © Australian Mathematical Society 1970
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