##### 1. Analytic differenceability of functions

*Volume 3, Issue 1 , Winter 2021, Pages 1-12*

#####
**Abstract **

Analytic summability of functions was introduced by Hooshmand in 2016. He used Bernoulli numbers and polynomials Bn(z) to define analytic summability and related analytic summand functions. ...
Read More
##### 2. Generalized Ulam-Hyers stability of an alternate additive-quadratic-quartic functional equation in fuzzy Banach spaces

*Volume 3, Issue 1 , Winter 2021, Pages 13-31*

#####
**Abstract **

In this paper, we obtain and establish the generalized Ulam-Hyers stability of an additive-quadratic-quartic functional equation in fuzzy Banach spaces.
Read More
##### 3. Some results on disjointness preserving Fredholm operators between certain Banach function algebras

*Volume 3, Issue 1 , Winter 2021, Pages 32-39*

#####
**Abstract **

For two algebras $\A$ and $\B$, a linear map $T : \A \lo \B$ is disjointness preserving if $x \cdot y = 0$ implies $Tx \cdot Ty = 0$ for all $x, y \in \A$ and is said ...
Read More
##### 4. Weakly principally quasi-Baer rings and generalized triangular matrix rings

*Volume 3, Issue 1 , Winter 2021, Pages 39-45*

#####
**Abstract **

A ring $R$ is called weakly principally quasi-Baer or simply (weakly p.q.-Baer) if the right annihilator of a principal right ideal is right $s$-unital by right semicentral ...
Read More
##### 5. A proof of the Cauchy--Schwarz inequality from the change of reference frame

*Volume 3, Issue 1 , Winter 2021, Pages 46-47*

#####
**Abstract **

Inspired by [1] a proof of the Cauchy--Schwarz inequality is given by considering the transformation between two different inertial reference frames.
Read More
##### 6. Stability of quartic functional equation in paranormed spaces

*Volume 3, Issue 1 , Winter 2021, Pages 48-58*