On a certain L-ideal of the measure algebra
On a class of convolution algebras of functions
The Banach spaces defined in this paper consist essentially of those elements of ( being a locally compact group) which can in a certain sense be well approximated by functions with compact support. The main result of this paper is the fact that in many cases becomes a Banach convolution algebra. There exist many natural examples. Furthermore some theorems concerning inclusion results and the structure of these spaces are given. In particular we prove that simple conditions imply the existence...
On a covering group theorem and its applications.
On Beurling measure algebras
We show how the measure theory of regular compacted-Borel measures defined on the -ring of compacted-Borel subsets of a weighted locally compact group provides a compatible framework for defining the corresponding Beurling measure algebra , thus filling a gap in the literature.
On Closed Ideals in the Motion Group Algebra.
On infinitely divisible measures on certain finitely generated groups.
On s-sets and mutual absolute continuity of measures on homogeneous spaces.
On strong Riesz sets
On the continuity of convolution.
On the relationships between Fourier-Stieltjes coefficients and spectra of measures
We construct examples of uncountable compact subsets of complex numbers with the property that any Borel measure on the circle group with Fourier coefficients taking values in this set has a natural spectrum. For measures with Fourier coefficients tending to 0 we construct an open set with this property. We also give an example of a singular measure whose spectrum is contained in our set.
Positive Characters on Commutative Hypergroups and Some applications.
Quelques résultats et problèmes en algèbre des mesures continues
Radial Convolutors on Free Groups
Radial convolutors on free groups
Reiter's condition on foundation semigroups.
Remarks on Maximal Left Ideals in Semigroups.
Representations and Positive Definite Functions on Hypergroups
Some relationships between representations of a hypergroup X, its algebras, and positive definite functions on X are studied. Also, various types of convergence of positive definite functions on X are discussed.
Saturation on Locally Compact Abelian Groups.
Second duals of measure algebras [Book]
Semigroup algebras having regular multiplication