Further results on images of metric spaces
Author(s) -
Nguyen Van Dũng
Publication year - 2015
Publication title -
publications de l institut mathematique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.246
H-Index - 17
eISSN - 1820-7405
pISSN - 0350-1302
DOI - 10.2298/pim150219022d
Subject(s) - separable space , metric space , counterexample , metric (unit) , mathematics , convex metric space , injective metric space , uniform continuity , space (punctuation) , metric map , pure mathematics , discrete mathematics , mathematical analysis , computer science , operations management , economics , operating system
We introduce the notion of an ls-π-Ponomarev-system to give necessary and sufficient conditions for f:(M,M0) → X to be a strong wc-mapping (wc-mapping, wk-mapping) where M is a locally separable metric space. Then, we systematically get characterizations of weakly continuous strong wc-images (wc-images, wk-images) of locally separable metric spaces by means of certain networks. Also, we give counterexamples to sharpen some results on images of locally separable metric spaces in the literature.
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