Topological spaces
Čech, Eduard, Frolík, Zdeněk, Katětov, Miroslav
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Čech, Eduard, Frolík, Zdeněk, Katětov, Miroslav
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H.-H. Herda, R. C. Metzler (1966)
Colloquium Mathematicae
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Čech, Eduard, Katětov, Miroslav, Novák, Josef, Švec, Alois
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Karol Borsuk (1959)
Fundamenta Mathematicae
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Roland Coghetto (2015)
Formalized Mathematics
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Using Mizar [9], and the formal topological space structure (FMT_Space_Str) [19], we introduce the three U-FMT conditions (U-FMT filter, U-FMT with point and U-FMT local) similar to those VI, VII, VIII and VIV of the proposition 2 in [10]: If to each element x of a set X there corresponds a set B(x) of subsets of X such that the properties VI, VII, VIII and VIV are satisfied, then there is a unique topological structure on X such that, for each x ∈ X, B(x) is the set of neighborhoods...
Koutský, K., Sekanina, M.
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Panos Lambrinos (1980)
Manuscripta mathematica
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