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On Compact Operators Whose Norms Are Eigenvalues and Completeness

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Publication Date
2/21/2018
Author
Owino, J. N.
Okelo, N. B.
Ongati, Omolo
Type
Article
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Abstract/Overview

Let X be a Banach space and T: X→Y be a linear operator, then Tis compact if it maps bounded sequences in X to sequences in Y with convergent subsequences, that is, if xn ∈ X is a bounded sequence, then T xn ∈ Y has a convergent subsequence say, T xnk in Y. The eigenvalue of an operator T, is a scalar λ if there is a nontrivial solution x such that T x=λ x. Such an x is called an eigenvector corresponding to the eigenvalue λ. A vector space is complete if every Cauchy sequence in V converges in V. It is known that every finite dimensional nor medspace is complete and that a Hilbert space is a normed space that is complete with respect to the norm induced by the inner product. In this paper we have established the conditions for completeness of a compact operator T whose norm is an eigenvalue.

Subject/Keywords
Norm; Completeness; Uniformly continuous
Publisher
International Journal of Contemporary Mathematical Sciences
Permalink
http://ir.jooust.ac.ke:8080/xmlui/handle/123456789/8813
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