فهرست مطالب
Mathematics Interdisciplinary Research
Volume:8 Issue: 4, Autumn 2023
- تاریخ انتشار: 1402/09/10
- تعداد عناوین: 6
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Pages 291-307A nonnegative square and real matrix $R$ is a row stochastic matrix if the sum of the entries of each row is equal to one. Let $x$, $y \in \mathbb{R}_{n}$. The vector $x$ is said to be matrix majorized by $y$ and denoted by $ x\prec_{r} y$ if $x=yR$ for some row stochastic matrix $R$. In the present paper, we characterize the linear preservers of matrix majorization $T:\mathbb{R}_{m} \rightarrow \mathbb{R}_{n}$.Keywords: Linear preserver, Matrix majorization, $m$-{R}ow stochastic matrix
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Pages 309-325A new subclass of meromorphic univalent functions by using the q-hypergeometric and Hurwitz-Lerch Zeta functions is defined. Also, by applying the generalized Liu-Srivastava operator on meromorphic functions, some geometric properties of the new defined subclass such as coefficient estimates, extreme points, convexity and connected set structure are investigated.Keywords: Meromorphic function, Convolution, $, lambda-$Generalized, Hurwitz-Lerch Zeta function, $Q$-hypergeometric function
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Pages 327-335In the present paper it is shown that Bogomolov multipliers of isoclinic Lie rings are isomorphic. Also, we show that isoclinic finite Lie rings have isoclinic CP covers. Finally, it is proved that if $CE_1$ and $CE_2$ are central extensions which are isoclinic, then $CE_2$ is a CP extension if $CE_1$ is so.Keywords: Isoclinism, Curly exterior product, ${, tilde{B, 0}}$-pairing, Bogomolov multiplier, CP extension
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Pages 337-345In this paper, we extend the notion of approximate convexity to set-valued maps and obtain some relations between approximate convexity and approximate monotonicity of their normal subdifferential.Keywords: Generalized convexity, Generalized monotonicity, Set-valued map, Generalized subdifferential
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Pages 347-358This paper presents the visualization process of finding the roots of a complex polynomial - which is called polynomiography - by the Caputo fractional derivative. In this work, we substitute the variable-order Caputo fractional derivative for classic derivative in Newton's iterative method. To investigate the proposed root-finding method, we apply it for two polynomials $p(z)=z^5-1$ and $ p(z)=-2z^4+z^3+z^2-2z-1 $ on the complex plane and compute the MNI and CAI parameters.Presented examples show that through the expressed process, we can obtain very interesting fractal patterns. The obtained patterns show that the proposed method has potential artistic application.Keywords: Caputo fractional derivative, Root-finding method, Newton's method, Polynomiography
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Pages 359-367This paper presents a method for characteristic function assignment on rational functions by adding perturbation in systems with irrational characteristic functions. Generally, in systems with irrational characteristic loci, commutative compensator designs are not possible. Irrational characteristic functions have different forms. In our previous work, mentioned in the introduction section, a form of these characteristic functions was presented. Another form of irrational characteristic functions is considered in this paper. This approach is not based on the transfer function inverting, and characteristic loci are not used directly in the design process. The efficacy of the proposed approach is investigated through two numerical examples.Keywords: Characteristic function assignment, Commutative compensator, Irrational characteristic function