**Volume 4 (2022)**

**Volume 3 (2021)**

**Volume 2 (2020)**

**Volume 1 (2019)**

##### 1. Analytic differenceability of functions

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

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**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. Since the Bernoulli and Euler polynomials have many similarities, so it motivated us to define differenceability ...
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##### 2. Generalized Ulam-Hyers stability of an alternate additive-quadratic-quartic functional equation in fuzzy Banach spaces

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

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**Abstract **

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

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

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**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 Fredholm if dim(ker($T$)) i.e. the nullity of $T$ and codim($T(E)$) i.e. the corank of $T$ are finite. We develop ...
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##### 4. Weakly principally quasi-Baer rings and generalized triangular matrix rings

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

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**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 idempotents. In this paper, we characterize when a generalized triangular matrix ring is a weakly p.q.-Baer ...
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##### 5. A proof of the Cauchy--Schwarz inequality from the change of reference frame

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

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**Abstract **

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

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