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Title: Biseparating maps on generalized Lipschitz spaces
Authors: Leung, D.H. 
Keywords: Biseparating maps
Vector-valued lipschitz functions
Issue Date: 2010
Source: Leung, D.H. (2010). Biseparating maps on generalized Lipschitz spaces. Studia Mathematica 196 (1) : 23-40. ScholarBank@NUS Repository.
Abstract: Let X,Y be complete metric spaces and E, F be Banach spaces. A bijective linear operator from a space of E-valued functions on X to a space of F-valued functions on Y is said to be biseparating if f and g are disjoint if and only if Tf and Tg are disjoint. We introduce the class of generalized Lipschitz spaces, which includes as special cases the classes of Lipschitz, little Lipschitz and uniformly continuous functions. Linear biseparating maps between generalized Lipschitz spaces are characterized as weighted composition operators, i.e., of the form Tf(y) = Sv(f(h-1(y))) for a family of vector space isomorphisms Sv : E → F and a homeomorphism h : X → Y. We also investigate the continuity of T and related questions. Here the functions involved (as well as the metric spaces X and Y) may be unbounded. Also, the arguments do not require the use of compactification of the spaces X and Y. © Instytut Matematyczny PAN, 2010.
Source Title: Studia Mathematica
ISSN: 00393223
DOI: 10.4064/sm196-1-3
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