Volume 4 (2022)
Volume 3 (2021)
Volume 2 (2020)
Volume 1 (2019)
Number of Articles: 6
Toeplitzness of weighted composition operators
Volume 2, Issue 1 , April 2020, Pages 1-8
Abstract
For a bounded analytic map ψ on the unit disk D and analytic self-map φ of D, a weighted composition operator Cψ,φ on the Hardy space H2=H2(D) is ... Read More
A simple method to solve nonlinear Volterra-Fredholm integro-differential equations
Volume 2, Issue 1 , April 2020, Pages 9-16
Abstract
In this paper, a new simple direct method to solve nonlinear Fredholm-Volterra integral equations is presented. By using Block-pulse (BP) functions, their operational matrices and Taylor ... Read More
The generalized Hyers–Ulam stability of derivations in non-Archimedean Banach algebras
Volume 2, Issue 1 , April 2020, Pages 17-22
Abstract
In this paper, the generalized Hyers-Ulam stability of the functional inequality||f(a)+f(b)+cf(d)+f(c)d||≤||kf((a+b+cd)/k)||, |k|<|2|,in non-Archimedean ... Read More
Locally finite inverse semigroups
Volume 2, Issue 1 , April 2020, Pages 23-27
Abstract
In this article, we study locally finite inverse semigroup S and characterize the structure of idempotents of S which are either a well-ordered countable chain or union of ... Read More
Certain dense subalgebras of continuous vector-valued operator algebras
Volume 2, Issue 1 , April 2020, Pages 28-34
Abstract
Let X be a compact metric space with at least two elements, B be a unital commutative Banach algebra over the scalar field F=R or C, and α in R with 0<α≤1. Suppose ... Read More
A new notion of affine sets
Volume 2, Issue 1 , April 2020, Pages 35-42