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The lambda-property for generalised direct sums of normed spaces

Published online by Cambridge University Press:  17 April 2009

Robert H. Lohman
Affiliation:
Department of Mathematical Sciences, Kent State University, Kent, OH 44242, United States of America
Thaddeus J. Shura
Affiliation:
Department of Mathematical Sciences, Kent State University at Salem, Salem OH 44460, United States of America
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This paper considers direct sums of normed spaces with respect to a Banach space with a normalised, unconditionally strictly monotone basis. Necessary and sufficient conditions are given for such direct sums to have the λ-property. These results are used to construct examples of reflexive Banach spaces U and V such that U has the uniform λ-property but U* fails to have the λ-property, while V and V* fail to have the λ-property.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1990

References

[1]Aron, R.M. and Lohman, R.H., ‘A geometric function determined by extreme points of the unit ball of a normed space’, Pacific J. Math. 127 (1987), 209231.CrossRefGoogle Scholar
[2]Granero, A.S., ‘On the Aron-Lohman λ-property’, (preprint).Google Scholar
[3]Granero, A.S., ‘The λ-function in the spaces and Lp(μ, X), 1 ≤ p ≤ ∞’, (preprint).Google Scholar
[4]Lohman, R.H., ‘The λ-function in Banach spaces’, Contemporary Mathematics, Banach Space Theory 85 (1989), 345354.CrossRefGoogle Scholar
[5]Lohman, R.H. and Shura, T.J., ‘Calculation of the λ-function for several classes of normed linear spaces, Nonlinear and Convex Analysis’, in Proceedings in Honor of Ky Fan, Marcel Dekker Lecture Notes in Pure and Applied Mathematics, pp. 167174, 1987.Google Scholar
[6]Shura, T.J., Ph.D. Dissertation, Kent State University.Google Scholar
[7]Shura, T.J. and Trautman, D., ‘The λ-property in Schreier's space S and the Lorentz space d(a, 1)’, (preprint).Google Scholar
[8]Singer, I., Bases in Banach Spaces I(Springer-Verlag, Heidelberg, Berlin, New York, 1970).CrossRefGoogle Scholar
[9]Smith, M.A., ‘Rotundity and extremicity in ℓp(Xi) and Lp(μ,X)’, in Contemporary Mathematics: Geometry of Normed Linear Spaces 52, pp. 143160, 1986.CrossRefGoogle Scholar
[10]Trujillo, F.B., ‘The λ-property in the C(K,R) spaces’, (preprint).Google Scholar