The T0-reflection in the category V-PreTop

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2020
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Mark
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Vysoké učení technické v Brně, Fakulta strojního inženýrství, Ústav matematiky
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Abstract
AV-pretopological space is a pair(X, a)whereXis a nonempty set andais aP(X)self map satisfyinga(∅) =∅,A⊆a(A)anda(A∪B) =a(A)∪a(B)foranyA, B∈ P(X). It is well known that the categoryTopof topological spaces isa reflective subcategory in the categoryV-PreTopwhose objects are pretopologicalspaces of typeV. In the present paper we give the construction of theT0-reflectionin the categoryV-PreTop. Hence, some new separation axioms are introducedand characterized. Finally, the orthogonal of some subcategories are studied.
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Mathematics for Applications. 2020 vol. 9, č. 1, s. 43-53. ISSN 1805-3629
http://ma.fme.vutbr.cz/archiv/9_1/ma_9_1_lazaar_et_al_final.pdf
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en
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© Vysoké učení technické v Brně, Fakulta strojního inženýrství, Ústav matematiky
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