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A categorical study of compactness via closure
(Stellenbosch : Stellenbosch University, 2009-03)
We have the familiar Kuratowski-Mr owka theorem in topology, where compactness is characterised by a closure and a projection-map (X is compact i p : X Y ! Y is a closed mapping, for any space Y , i.e. p(A) = p(A) A ...