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Cardinal invariants in remainders and variations of tightness

โœ Scribed by Arhangel{\cprime}skii, A. V.; Bella, A.


Book ID
124095869
Publisher
American Mathematical Society
Year
1993
Tongue
English
Weight
862 KB
Volume
119
Category
Article
ISSN
0002-9939

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A space X is called a t-image of Y if C,(X) is homeomorphic to a subspace of C,(Y). We prove that if Y is a t-image of X, then Y is a countable union of images of X under almost lower semicontinuous finite-valued mappings (see Definition 1.4). It follows that if Y is a t-image of X (in particular, i