Search results for "General Mathematics"
showing 10 items of 3795 documents
QUANTIZATION OPERATORS ON QUADRICS
2008
Singular integrals and rectifiability
2002
We shall discuss singular integrals on lower dimensional subsets of Rn. A survey of this topic was given in [M4]. The first part of this paper gives a quick review of some results discussed in [M4] and a survey of some newer results and open problems. In the second part we prove some results on the Riesz kernels in Rn. As far as I know, they have not been explicitly stated and proved, but they are very closely related to some earlier results and methods. [Proceedings of the 6th International Conference on Harmonic Analysis and Partial Differential Equations, El Escorial (Madrid), 2002].
Improvement of Grüss and Ostrowski type inequalities
2015
Several inequalities of Ostrowski-Gr?ss-type available in the literature are generalized considering the weighted case of them. The inequality of Gr?ss type proved by P. Cerone and S.S. Dragomir [3] is extended for the weighted case.
Some problems in number theory that arise from group theory
2021
In this expository paper, we present several open problems in number theory that have arisen while doing research in group theory. These problems are on arithmetical functions or partitions. Solving some of these problems would allow to solve some open problem in group theory.
A spectral mapping theorem for perturbed strongly continuous semigroups
1991
Local functions on finite groups
2020
We study local properties of finite groups using chains of p p -subgroups.
Product of extension domains is still an extension domain
2018
We prove the product of the Sobolev-extension domains is still a Sobolev-extension domain.
The essential spectrum of AM-compact operators
1991
Erratum to “Orbit sizes, character degrees and Sylow subgroups” [Adv. Math. 184 (2004) 18–36]
2004
Continuous *-homomorphisms of Banach Partial *-algebras
2007
We continue the study of Banach partial *-algebras, in particular the question of the interplay between *-homomorphisms and biweights. Two special types of objects are introduced, namely, relatively bounded biweights and Banach partial *-algebras satisfying a certain Condition (S), which behave in a more regular way. We also present a systematic construction of Banach partial *-algebras of this type and exhibit several examples.