Topology from Neighbourhoods

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)...

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Bibliographic Details
Main Author: Coghetto Roland
Format: Article
Language:English
Published: Sciendo 2015-12-01
Series:Formalized Mathematics
Subjects:
Online Access:https://doi.org/10.1515/forma-2015-0023