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JOURNALS // Matematicheskie Zametki // Archive

Mat. Zametki, 1978 Volume 23, Issue 4, Pages 563–572 (Mi mzm8171)

This article is cited in 7 papers

Strict sums and semicontinuity below metric projections in linear normed spaces

N. V. Nevesenko

Ural State University

Abstract: The relationships, are studied between strict suns [1] and sets with semicontinuous below metric projections, and also certain general properties of these classes of sets in linear normed spaces. There are characterized finite-dimensional normed spaces in which the class of strict suns coincides with the class of nonvacuous closed sets having semicontinuous below metric projections. It is proven that a $P$-connected [1] set with semicontinuous below (semicontinuous above) metric projections is $V$-connected [1].

UDC: 517.5

Received: 24.04.1976


 English version:
Mathematical Notes, 1978, 23:4, 308–312

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