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Strong uniform continuity
Authors:Gerald Beer  Sandro Levi  
Affiliation:aDepartment of Mathematics, California State University Los Angeles, 5151 State University Drive, Los Angeles, CA 90032, USA;bDipartimento di Matematica e Applicazioni, Universita' di Milano-Bicocca, Via Cozzi 53, 20125 Milano, Italy
Abstract:Let View the MathML source be an ideal of subsets of a metric space left angle bracketX,dright-pointing angle bracket. This paper considers a strengthening of the notion of uniform continuity of a function restricted to members of View the MathML source which reduces to ordinary continuity when View the MathML source consists of the finite subsets of X and agrees with uniform continuity on members of View the MathML source when View the MathML source is either the power set of X or the family of compact subsets of X. The paper also presents new function space topologies that are well suited to this strengthening. As a consequence of the general theory, we display necessary and sufficient conditions for continuity of the pointwise limit of a net of continuous functions.
Keywords:Uniform continuity   Strong uniform continuity   Oscillation   Uniform convergence   Strong uniform convergence   UC set   Bornology
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