Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
431079 | The Journal of Logic and Algebraic Programming | 2008 | 5 Pages |
Abstract
Let X be a topological space. The closure of Δ={(x,x):x∈X} in X×X is a symmetric relation on X. We characterise those equivalence relations on an infinite set that arise as the closure of the diagonal with respect to a T1-topology.
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