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Multiplication operators on Cesàro-Orlicz sequence spaces

Raj K., Sharma C., Pandoh S.

Fasciculi Mathematici

2016

Nr 57

137--145

In this paper, we characterize the compact, invertible, Fredholm and closed range multiplication operators on Cesàro-Orlicz sequence spaces.

Multiplication operators on Cesàro sequence spaces

Komal B. S., Pandoh S., Raj K.

Demonstratio Mathematica

2016

Vol. 49, nr 4

430--436

In this paper we characterize the compact, invertible and Fredholm multiplication operators on Cesàro sequence spaces.

Sylvester inertia law in commutative Leibniz algebras with logarithms

Przeworska-Rolewicz D.

Demonstratio Mathematica

2007

Vol. 40, nr 3

659-669

In algebras with logarithms induced by a given right invertible operator D one can define quadratic forms by means of power mappings induced by logarithmic mapping. Main results of this paper will be concerned with the case when an algebra X under consideration is commutative and has a unit and the operator D satisfies the Leibniz condition, i.e. D(xy) = xDy+yDx for x, y is an element of dom D. If X is an locally m-convex algebra then these forms have the similar properties as quadratic forms in the Euclidian spaces En, including the Sylvester inertia law.