Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-27T02:47:37.444Z Has data issue: false hasContentIssue false

Compact multipliers on weighted hypergroup algebras

Published online by Cambridge University Press:  24 October 2008

F. Ghahramani
Affiliation:
Department of Mathematics, University for Teacher Education, Tehran, Iran
A. R. Medgalchi
Affiliation:
Department of Mathematics, University for Teacher Education, Tehran, Iran

Abstract

Let Mω(X) be a weighted hypergroup algebra, and Lω(X) be the Banach algebra of measures μ ε Mω(X) such that the function x ↦ (1/ω(x))δx* |μ| is norm continuous. We characterize compact multipliers on Lω(X). This extends the characterization of compact multipliers on weighted group algebras and some classes of weighted semigroup algebras.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1985

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]Akemann, C.. Some mapping properties of the group algebras of a compact group. Pacific J. Math. 22 (1967), 18.Google Scholar
[2]Bade, W. G. and Dales, H. G.. Norms and ideals in radical convolution algebras. J. Functional Analysis 41 (1981), 77109.Google Scholar
[3]Baker, Anne C. and Baker, J. W.. Algebras of measures on a locally compact semigroup. J. London Math. Soc. 2 (1970), 651659.CrossRefGoogle Scholar
[4]Dunford, N. and Schwartz, J. T.. Linear Operators 1, General Theory (Interscience, 1958).Google Scholar
[5]Dunkl, C. F.. The measure algebra of a locally compact hypergroup. Trans. Amer. Math. Soc. 179 (1973), 331348.CrossRefGoogle Scholar
[6]Ghahramani, F.. homomorphisms and derivations on weighted convolution algebras. J. London Math. Soc. (2), 21 (1980), 149161.CrossRefGoogle Scholar
[7]Ghahramani, F.. Compact elements of weighted group algebras. Pacific J. Math. 113 (1984), 7784.Google Scholar
[8]Ghahramani, F.. Weighted group algebra as an ideal in its second dual space. Proc. Amer. Math. Soc. 90 (1984), 7176.Google Scholar
[9]Grønbæk, N.. Derivations and Semigroups, Commutative Radical Banach Algebras. Køben havens Universitet Mathematisk Institut, Publikation Series, no. 3, 1980.Google Scholar
[10]Hewitt, E. and Ross, K. A.. Abstract Harmonic Analysis II (Springer Verlag, 1970).Google Scholar
[11]Jewett, R. I.. Spaces with an abstract convolution of measures. Advances in Math. 18 (1975), 1101.Google Scholar
[12]Medgalchi, A. R.. Ph.D. Thesis, University of Sheffield, 1982.Google Scholar
[13]Spector, R.. Sur la structure locale des groupes abéliens localement compacts. Soc. Math. France Mémoire 24 (1970), 194.Google Scholar
[14]Sakai, S.. Weakly compact operators on operator algebras. Pacific J. Math. 14 (1964), 659664.CrossRefGoogle Scholar
[15]Vrem, R. C.. Lacunarity on compact hypergroups. Math. Z. 164 (1978), 93104.Google Scholar
[16]Vrem, R. C.. Harmonic analysis on compact hypergroups. Pacific J. Math. 85 (1979), 239251.Google Scholar
[17]Vrem, R. C.. Continuous measures and lacunarity on hypergroups. Trans. Amer. Math. Soc. (2), 269 (1982), 549557.Google Scholar