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  • 1
    Electronic Resource
    Electronic Resource
    Constructive approximation 8 (1992), S. 223-231 
    ISSN: 1432-0940
    Keywords: 46B20 ; 41A65 ; Contractive retract ; Best co-approximation ; Intersection of norm-convex cylinder sets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Two characterizations of ranges of contractive (nonlinear) projections on a finite or infinite dimensionall 1 space are given. One is related to best co-approximation, the other deals with intersections of sets having a simple structure. Concerning the latter the notion of a cylinder set is introduced which serves to replace a certain type of closed half-spaces that are known to be used in characterizing contractive retracts ofl p spaces, 1〈p〈∞,p≠2.
    Type of Medium: Electronic Resource
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