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BOUNDED LINEAR OPERATORS ON SPACES IN NORMED DUALITY

Published online by Cambridge University Press:  01 January 2007

BRUCE A. BARNES*
Affiliation:
Dept. of Math., Univ. of Oregon, Eugene, OR 97403, USA e-mail: barnes@math.oregon.edu
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Abstract.

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Let T be a bounded linear operator on a Banach space W, assume W and Y are in normed duality, and assume that T has adjoint T† relative to Y. In this paper, conditions are given that imply that for all λ≠0, λ−T and λ −T† maintain important standard operator relationships. For example, under the conditions given, λ −T has closed range if, and only if, λ −T† has closed range.

These general results are shown to apply to certain classes of integral operators acting on spaces of continuous functions.

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Type
Research Article
Copyright
Copyright © Glasgow Mathematical Journal Trust 2007