Hostname: page-component-848d4c4894-x24gv Total loading time: 0 Render date: 2024-05-10T16:21:28.203Z Has data issue: false hasContentIssue false

A Note on M-Ideals of Compact operators

Published online by Cambridge University Press:  20 November 2018

Chong-Man Cho*
Affiliation:
Department of Mathematics College of Natural Science Hanyang University Seoul 133-791, Korea
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Suppose X and Y are closed subspaces of Xn)p and (ΣYn)q (1 < p ≦ q < ∞, dim Xn < ∞, dimYn < ∞), respectively. If K(X, Y), the space of the compact linear operators from X to Y, is dense in L(X, Y), the space of the bounded linear operators from X to Y, in the strong operator topology, then K(X, Y) is an M-ideal in L(X, Y).

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1989

References

1. Alfsen, E. M. and E. G. Effros, Structure in real Banach spaces, Ann. of Math. 96 (1972), 98173.Google Scholar
2. Behrends, E., M-structure and the Banach-Stone Theorem, Lecture Note in Mathematics 736, Springer-Verlag (1979).Google Scholar
3. Cho, C.-M. and Johnson, W. B., A characterization of sub space s X of lp for which K(X) is an M-ideal in L﹛X), Proc. Amer. Math. Soc. 93 (1985), 466470.Google Scholar
4. Cho, C.-M., M-ideals of compact operators, Pacific J. Math, 138 (1989), 237242.Google Scholar
5. Harmand, P. and Lima, A., Banach spaces which are M-ideals in their biduals, Trans. Amer. Math. Soc. 283 (1983), 253264.Google Scholar
6. Hennefeld, J., A decomposition for B(X)* and unique Hahn-Banach extensions, Pacific J. Math. 46 (1973), 197199.Google Scholar
7. Lima, A., Intersection properties of balls and subspaces of Banach spaces, Trans. Amer. Math. Soc. 227 (1977), 162.Google Scholar
8. Lima, A., Intersection properties of balls in the space of compact operators, Ann. Inst. Fourier, Grenoble 28, 3 (1978), 274286.Google Scholar
9. Lima, A., M-ideals of compact operators in classical Banach spaces, Math. Scand. 44 (1979), 207- 217.Google Scholar
10. Lindenstrauss, J. and Tzafriri, L., Classical Banach spaces I, Springer-Verlag, Berlin (1977).Google Scholar
11. March, J. and Ward, J. D., Approximation by compact operators on certain Banach spaces, J. of Approximaion theory 23 (1978), 274284.Google Scholar
12. Saatkamp, K., M-ideals of compact operators, Math. Z. 158 (1978), 253263.Google Scholar
13. Smith, R. R. and Ward, J. D., M-ideal structure in Banach algebras, J. Func. Anal. 27 (1978), 337349.Google Scholar
14. Smith, R. R. and J. D. Ward, Application of convexity and M-ideal theory to quotient Banach algebras, Quart. J. Math. Oxford (2), 30 (1979), 365384.Google Scholar
15. Werner, D., Remarks on M-ideals of compact operators, preprint.Google Scholar