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 Sahand Communications in Mathematical AnalysisNumber of Followers: 0     Open Access journal ISSN (Print) 2322-5807 - ISSN (Online) 2423-3900 Published by U of Maragheh  [1 journal]
• Three Weak Solutions for an Anisotropic Variable Exponent Problem with
Neumann Boundary Condition

• Abstract: In the present work, we investigate an interval of real parameters $\lambda$ for which the problem admits at least one nontrivial solution. Moreover we deal with the existence results of three solutions for anisotropic problems with variable exponents.

• Uncertain Measure and its Application in Minimum Weighted Maximal Matching
Problem

• Abstract: The inherent feature of real-world data is uncertainty. If data is generated in valid experiments or standard collections, probability theory or fuzzy theory is a powerful tool for analyzing them. But data is not always reliable, especially when it is not possible to perform a reliable test or data collection multiple times. In this situations, referring to the beliefs of experts in the field in question is an alternative approach and uncertainty theory is a tool by which the beliefs of experts can be mathematically incorporated into the problem-solving structure. In this paper, we investigate the finding minimum weighted maximal matching with uncertain weights. For this purpose, we offer two methods. In the first method, by introducing the concept of chance constraint, we obtain model with definite coefficients. The second method is based on the concept of uncertain expected value. Finally, a numerical example for these two methods is presented.&nbsp;

• A New and Faster Iterative Scheme Including Generalized
$\alpha$-nonexpansive Mappings in Banach Spaces

• Abstract: In this paper, we proposed a new iterative process to approximate fixed point of generalized $\alpha$-nonexpansivemappings and show that the coefficient used in the proposed iterative process play a fundamental role in the rate of convergence. We compare the speed of convergence of new iterative process &nbsp;with other well-known iterative process by using numerical examples. Finally, by using new iterative process, we obtained some weak and strong convergence theorems for generalized $\alpha$-nonexpansive mappings in a &nbsp;Banach space.

• Modified Inertial Algorithms for a Class of Split Feasibility Problems and
Fixed Point Problems in Hilbert Spaces

• Abstract: In this work, we introduce an iterative algorithm for solving the split feasibility problem on zeros of the sum of monotone operators and fixed point sets and also solving the fixed point problem of a nonexpansive mapping. This algorithm is a modification of the method based on the inertial and Mann viscosity-type methods. By assuming the existence of solutions, we show the strong convergence theorems of the constructed sequences. Finally, we also apply the proposed algorithm to related problems in Hilbert spaces.

• The Generalized Inequalities via Means and Positive Linear Mappings

• Abstract: In this paper, we establish further improvements &nbsp;of the Young inequality and its reverse. Then, we assert operator versions corresponding them. Moreover, an application including positive linear mappings is given. For example, if $A,B\in {\mathbb B}({\mathscr H})$ are two invertible positive operators such that 0\begin{align*}&amp; \Phi ^{2} \bigg(A \nabla _{\nu} B+ rMm \left( A^{-1}+A^{-1} \sharp_{\mu} B^{-1} -2 \left(A^{-1} \sharp_{\frac{\mu}{2}} B^{-1} \right)\right)\\&amp; \qquad +\left(\frac{\nu}{\mu} \right) Mm \bigg(A^{-1}\nabla_{\mu} B^{-1} -A^{-1} \sharp_{\mu} B^{-1}\bigg)\bigg) \\&amp; \quad \leq \left( \frac{K(h)}{ K\left( \sqrt{{h^{'}}^{\mu}},2 \right)^{r^{'}}} \right) ^{2} \Phi^{2} (A \sharp_{\nu} B),\end{align*}wherer=\min\{\nu,1-\nu\}$,$K(h)=\frac{(1+h)^{2}}{4h}$, &nbsp;$h=\frac{M}{m}$,$h^{'}=\frac{M^{'}}{m^{'}}$and$r^{'}=\min\{2r,1-2r\}$. The results of this paper generalize the results of recent years.&nbsp; • On Some New Extensions of Inequalities of Hermite-Hadamard Type for Generalized Fractional Integrals • Abstract: In this paper, we establish some inequalities for generalized fractional integrals by utilizing the assumption that the second derivative of$\phi (x)=\varpi \left( \frac{\kappa _{1}\kappa _{2}}{\mathcal{\varkappa }}\right)&nbsp; $is bounded. We also prove again a Hermite-Hadamard type inequality obtained in [34] under the condition$\phi ^{\prime }\left( \kappa_{1}+\kappa _{2}-\mathcal{\varkappa }\right) \geq \phi ^{\prime }(\mathcal{\varkappa })$instead of harmonically convexity of$\varpi $. Moreover, some new inequalities for$k$-fractional integrals are given as special cases of main results. • Corrigenda: ''$\omega b-$Topological Vector Spaces'' • Abstract: In this corrigenda, we have pointed out that Example 2.7, Corollary 3.7 and Corollary 5.3 in the paper:$\omega b-$Topological Vector Spaces, WSEAS Trans. Math. 19 (2020),$119-132$, by Latif are incorrect. We have also presented the corrected version of these results. Furthermore, we introduce and study some new classes of topological vector spaces. • Approximation by Fuzzy$(p,q)$-Bernstein-Chlodowsky Operators • Abstract: In this study, we purpose to extend approximation properties of the$ (p,q)$-Bernstein-Chlodowsky operators from real function spaces to fuzzy function spaces. Firstly, we define fuzzy$ (p,q)$-Bernstein-Chlodowsky operators, and we give some auxiliary results. Later, we give a fuzzy Korovkin-type approximation theorem for these operators. Additionally, we investigate rate of convergence by using first order fuzzy modulus of continuity and Lipschitz-type fuzzy functions. Eventually, we give an estimate for fuzzy asymptotic expansions of the fuzzy$ (p,q)$-Bernstein-Chlodowsky operators. • On Uncountable Frames and Riesz Bases in Nonseparable Banach Spaces • Abstract: Some generalizations of Besselian, Hilbertian systems and frames in nonseparable Banach spaces with respect to some nonseparable Banach space$K$of systems of scalars are considered in this work. The concepts of &nbsp;uncountable$K$-Bessel,$K$-Hilbert systems,$K$-frames and &nbsp;$K^{*} $-Riesz bases in nonseparable Banach spaces are introduced. Criteria of uncountable$K$-Besselianness,$K$-Hilbertianness for systems,$K$-frames and unconditional$K^{*} $-Riesz basicity are found, and the relationship between them is studied. Unlike before, these new facts about Besselian and Hilbertian systems in Hilbert and Banach spaces are proved without using a conjugate system and, in some cases, a completeness of a system. Examples of$K$-Besselian systems which are not minimal are given. It is proved that every$K$-Hilbertian systems is minimal. The case where$K$is an space of systems of coefficients of uncountable unconditional basis of some space is also considered. • The Study of Felbin and$BS$Fuzzy Normed Linear Spaces • Abstract: In this paper, we first show that the &nbsp;induced topologies by Felbin and Bag-Samanta type fuzzy norms on a linear space$X$are equivalent. So all results in Felbin-fuzzy normed linear spaces are valid in Bag-Samanta fuzzy normed linear spaces and vice versa. Using this, we will be able to define a fuzzy norm on$FB(X,Y)$, the space of all fuzzy bounded linear operators from$X$into$Y$, where$X$and$Y$are fuzzy normed linear spaces. • Essential Norm of the Generalized Integration Operator from Zygmund Space into Weighted Dirichlet Type Space • Abstract: Let$H(\mathbb{D})$be the space of all analytic functions on the open unit disc$\mathbb{D}$in the complex plane$\mathbb{C}$. In this paper, we investigate the boundedness and compactness of the generalized integration operator$$I_{g,\varphi}^{(n)}(f)(z)=\int_0^z f^{(n)}(\varphi(\xi))g(\xi)\ d\xi,\quad z\in\mathbb{D},$$ from Zygmund space into weighted Dirichlet type space, where$\varphi$is an analytic self-map of$\mathbb{D}$,$n\in\mathbb{N}$and$g\in H(\mathbb{D})$. Also we give an estimate for the essential norm of the above operator. • Bijections on the Unit Ball of$B(H)$Preserving$^{\ast}$-Jordan Triple Product • Abstract: Let &nbsp;$ \mathcal{B}_1$&nbsp;denote the closed unit ball of &nbsp;$\mathcal B(H)$, the von Neumann algebra of all bounded linear operators on a complex Hilbert space$H$with$\dim H\geq 2$. Suppose that$\phi$is a bijection on$ \mathcal{B}_1$(with no linearity assumption) satisfying\begin{equation*}\phi(AB^{*}A)=\phi(A)\phi(B)^{*}\phi(A), \quad( A, B\in &nbsp;\mathcal{B}_1).\end{equation*}If$I$and$\mathbb T$denote the identity operator on$H$and the unit circle in$\mathbb C$, respectively and if$\phi$is continuous on$\{\lambda I: \lambda\in \mathbb T\}$, then we show that &nbsp;$\phi(I)$is a unitary operator and$\phi(I)\phi$extends to a linear or conjugate linear Jordan$^*$-automorphism on$\mathcal B(H)$. As a consequence, there is either a unitary or an antiunitary operator &nbsp;$U$on$H$such that$\phi(A)=\phi(I) UAU^*$,$(A\in {\mathcal B}_1)$or$ \phi(A)=\phi(I) UA^*U^*$,$(A\in {\mathcal B}_1)$. • Nearly$k-th$Partial Ternary Cubic$*$-Derivations On Non-Archimedean$\ell$-Fuzzy$C^{*}$-Ternary Algebras • Abstract: In this paper, we investigate approximations of the$k-th$partial ternary cubic derivations on non-Archimedean$\ell$-fuzzy Banach ternary algebras and non-Archimedean$\ell$-fuzzy$C^{*}$-ternary algebras. First, we study non-Archimedean and$\ell$-fuzzy spaces, and then &nbsp;prove the stability of partial ternary cubic$*$-derivations on non-Archimedean$\ell$-fuzzy$C^{*}$-ternary algebras. We therefore provide a link among different disciplines: fuzzy set theory, lattice theory, non-Archimedean spaces, and mathematical analysis. • Fixed Point Results for$F$-Hardy-Rogers Contractions via Mann's Iteration Process in Complete Convex$b$-Metric Spaces • Abstract: In this paper, we give a definition of the$F$-Hardy-Rogers contraction of Nadler type by eliminating the conditions$(F3)$and$(F4)$. And, we obtain some fixed point theorems for such mappings using Mann's iteration process in complete convex$b\$-metric spaces. We also give an example in order to support the main results, &nbsp;which generalize some results in [5,6].

• On New Integral Inequalities via Geometric-Arithmetic Convex Functions
with Applications

• Abstract: In this study, new Hermite-Hadamard type inequalities are generated for geometric-arithmetic functions with the help of an integral equation proved for differentiable functions. In proofs, some classical integral inequalities, such as H\"{o}lder's inequality, basic definitions and known mathematical analysis procedures are used. The third part of the study includes various applications confirming the accuracy of the generated results. A brief conclusion of the study has been given in the last part of the paper.

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