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The support of pseudomeasures on

Published online by Cambridge University Press:  12 February 2007

COLIN C. GRAHAM*
Affiliation:
Department of Mathematics, University of British Columbia, Mailing address: RR#1–H-46, Bowen Island, BC, V0N 1G0Canada. e-mail: [email protected]

Abstract

PM(E) denotes the set of pseudomeasures on with support in the closed set E. Then y is not in E if and only if there is a neighbourhood W of y with uniformly for wW and SPM(E) with ‖SPM ≤ 1. This improves previous results by adding “uniformly” and its scope. The proof uses the fact that squashing the central spike of the Fejer kernel leads to A-norm convergence.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 2007

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References

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