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On the spectrum of C1 as an operator on bv0

Published online by Cambridge University Press:  09 April 2009

J. I. Okutoyi
Affiliation:
Kenyatta UniversityP.O. Box 43844 Nairobi, Kenya
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Abstract

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In 1985 John Reade determined the spectrum of C1 regarded as an operator on the space c0 of all null sequences normed by ║x║ = supn≧0|xn|. It is the purpose of this paper to determine the spectrum of C1 regarded as an operator on the space bv0 of all sequences x such that xk → 0 as k → ∞ and .

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1990

References

[1]Borwein, D., ‘On strong and absolute summability’, Proc. Glasgow Math. Assoc. 4 (1959), 8183.CrossRefGoogle Scholar
[2]Dunford, N. and Schwartz, J. T., Linear operators, Part I, General theory (John Wiley and Sons, 1967).Google Scholar
[3]Goldberg, S., Unbounded Linear operators-theory and applications, (McGraw-Hill, 1966).Google Scholar
[4]Hardy, G. H., Divergent series, (Oxford, 1949).Google Scholar
[5]Jakimovski, A. and Ramanujan, S. M., ‘A uniform approximation theorem and its application to moment problems’, Math. Z. 84 (1964), 143153.CrossRefGoogle Scholar
[6]Jakimovski, A. and Russel, D. C., ‘Matrix mappings between BK-spaces’, Bull. London Math. Soc. 4 (1972), 345353.CrossRefGoogle Scholar
[7]Kreysig, E., Introductory functional analysis with applications, (John Wiley and Sons, 1980).Google Scholar
[8]Leibowitz, G., ‘The Cesàro operators and their generalizations: Examples in infinite dimensional linear analysis.’ Amer. Math. Monthly 80 (1973), 654661.Google Scholar
[9]Maddox, I. J., Elements of functional analysis, (Cambridge Univ. Press, 1970).Google Scholar
[10]Reade, J. B., ‘On the spectrum of the Cesèro operator,’ Bull. London Math. Soc. 17 (1985), 263267.CrossRefGoogle Scholar
[11]Rhoades, B. E., ‘Spectra of some Hausdrff operators,’ Acta Sci. Math. (Szeged) 32 (1971), 91100.Google Scholar
[12]Stieglitz, M. and Tietz, H., ‘Matrixtranformationen von Folgenräumen. Eine Ergebnisübersicht,’ Math Z. 154 (1977), 116.CrossRefGoogle Scholar
[13]Taylor, A. E. and Lay, D. C., Introduction to functional analysis (2nd ed., John Wiley and Sons, 1980).Google Scholar