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Some results of homogeneous expansions for a class of biholomorphic mappings defined on a Reinhardt domain in ℂn 在Reinhardt域上定义的一类生物全纯映射的齐次展开式的一些结果
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0242
Xiaoying Sima, Z. Tu, L. Xiong
Abstract Let S γ , A , B ∗ ( D ) {S}_{gamma ,A,B}^{ast }left({mathbb{D}}) be the usual class of g g -starlike functions of complex order γ gamma in the unit disk D = { ζ ∈ C : ∣ ζ ∣ < 1 } {mathbb{D}}=left{zeta in {mathbb{C}}:| zeta | lt 1right} , where g ( ζ ) = ( 1 + A ζ ) ∕ ( 1 + B ζ ) gleft(zeta )=left(1+Azeta )/left(1+Bzeta ) , with γ ∈ C { 0 } , − 1 ≤ A < B ≤ 1 , ζ ∈ D gamma leftin {mathbb{C}}backslash left{0right}right,-1le Alt Ble 1,zeta in {mathbb{D}} . First, we obtain the bounds of all the coefficients of homogeneous expansions for the functions f ∈ S γ , A , B ∗ ( D ) fin {S}_{gamma ,A,B}^{ast }left({mathbb{D}}) when ζ = 0 zeta =0 is a zero of order k + 1 k+1 of f ( ζ ) − ζ fleft(zeta )-zeta . Second, we generalize this result to several complex variables by considering the corresponding biholomorphic mappings defined in a bounded complete Reinhardt domain. These main theorems unify and extend many known results.
抽象设Sγ,A,B*(D){S}_{gamma,A,B}^{sast}left({mathbb{D})是复阶γγγ星形函数在单位圆盘D={ζ∈C:ζ(1+Bzeta),其中γ∈C{0},−1≤A
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引用次数: 0
Solvability for a system of Hadamard-type hybrid fractional differential inclusions Hadamard型混合分数微分包含系统的可解性
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0226
Keyu Zhang, Jiafa Xu
Abstract In this article, a new system of Hadamard-type hybrid fractional differential inclusions equipped with Dirichlet boundary conditions was constructed. By virtue of a fixed-point theorem due to B. C. Dhage, (Existence results for neutral functional differential inclusions in Banach algebras, Nonlinear Anal. 64 (2006), no. 6, 1290–1306, doi: https://doi.org/10.1016/j.na.2005.06.036), the existence results of solutions for the considered problem are derived in a new norm space for multivalued maps. A numerical example is provided to illustrate our main results.
摘要本文构造了一个新的具有Dirichlet边界条件的Hadamard型混合分数微分包含系统。根据B.C.Dhage的不动点定理,(Banach代数中中性泛函微分包含的存在性结果,非线性分析64(2006),第61290-1306号,doi:https://doi.org/10.1016/j.na.2005.06.036)在一个新的多值映射范数空间中,导出了所考虑问题解的存在性结果。给出了一个数值例子来说明我们的主要结果。
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引用次数: 1
Fekete-Szegö functional for a class of non-Bazilevic functions related to quasi-subordination Fekete-Szegö一类与拟从属相关的非巴齐勒维奇函数的泛函
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0232
S. Shah, S. Al-Sa'di, S. Hussain, Asifa Tasleem, A. Rasheed, I. Cheema, M. Darus
Abstract In this article, we study the Fekete-Szegö functional associated with a new class of analytic functions related to the class of bounded turning by using the principle of quasi-subordination. We derived the coefficient estimates including the classical Fekete-Szegö inequality for functions belonging to this class. We also improved some existing results.
摘要本文利用拟隶属原理,研究了Fekete-Szegö泛函与一类新的与有界转向有关的解析函数的关系。我们导出了这类函数的系数估计,包括经典的Fekete-Szegö不等式。我们还改进了一些现有的结果。
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引用次数: 0
Three solutions for discrete anisotropic Kirchhoff-type problems 离散各向异性Kirchhoff型问题的三种解法
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0209
M. Bohner, G. Caristi, Ahmad Ghobadi, S. Heidarkhani
Abstract In this article, using critical point theory and variational methods, we investigate the existence of at least three solutions for a class of double eigenvalue discrete anisotropic Kirchhoff-type problems. An example is presented to demonstrate the applicability of our main theoretical findings.
摘要本文利用临界点理论和变分方法,研究了一类双特征值离散各向异性Kirchhoff型问题至少三个解的存在性。举例说明了我们主要理论发现的适用性。
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引用次数: 1
The cross-border e-commerce platform selection based on the probabilistic dual hesitant fuzzy generalized dice similarity measures 基于概率对偶犹豫模糊广义骰子相似测度的跨境电商平台选择
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0239
Baoquan Ning, G. Wei
Abstract Cross-border e-commerce platform (CBECP) plays a very important role in the development of a cross-border e-commerce (CBEC). How to select the best CBECP scientifically and reasonably is a very critical multi-attribute group decision-making (MAGDM) issue. With the uncertainty of people’s cognition of the objective world, the decision-making process is full of a lot of fuzzy information. In view of the great advantages of probabilistic dual hesitation fuzzy set (FS) in expressing decision-making information, and in combination with the very extensive use of the Dice similarity measure (DSM), a new MAGDM method is proposed for the optimal CBECP selection (CBECPS) under the probabilistic dual hesitation fuzzy (PDHF) environment. First, on the basis of reviewing a large number of documents on the CBECPS for CBEC, the evaluation index system for the CBECPS is constructed; second, several new DSMs are proposed in the PDHF environment; third, based on the two newly proposed probabilistic dual hesitant weighted generalized Dice similarity measures, two novel MAGDM methods are provided for CBECPS, which are used for CBECPS; finally, the two established MAGDM techniques are compared with the existing decision-making methods, and the parameter analysis is carried out to illustrate the effectiveness and superiority of the two established MAGDM techniques. The two established techniques can not only be used for CBECPS of CBEC, but also be extended to similar related research.
摘要跨境电子商务平台(CBECP)对跨境电子商务的发展起着非常重要的作用。如何科学合理地选择最佳CBECP是一个非常关键的多属性群体决策问题。由于人们对客观世界认知的不确定性,决策过程中充满了大量的模糊信息。针对概率对偶犹豫模糊集(FS)在表达决策信息方面的巨大优势,结合Dice相似度度量(DSM)的广泛应用,提出了一种新的MAGDM方法,用于概率对偶犹豫模糊(PDHF)环境下CBECP的最优选择(CBECPS)。首先,在查阅大量CBECPS相关文献的基础上,构建了CBECPS评价指标体系;其次,在PDHF环境下提出了几种新的dsm;第三,在两种新提出的概率对偶犹豫加权广义骰子相似度测度的基础上,提出了针对CBECPS的两种新的MAGDM方法,并将其应用于CBECPS;最后,将所建立的两种MAGDM技术与现有的决策方法进行了比较,并进行了参数分析,以说明所建立的两种MAGDM技术的有效性和优越性。所建立的两种技术不仅可以用于CBEC的CBECPS,而且可以推广到类似的相关研究中。
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引用次数: 0
A numerical Haar wavelet-finite difference hybrid method and its convergence for nonlinear hyperbolic partial differential equation 非线性双曲型偏微分方程的数值Haar小波-有限差分混合方法及其收敛性
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0203
W. Lei, Muhammad Ahsan, Waqas Khan, Zaheer Uddin, Masood Ahmad
Abstract In this research work, we proposed a Haar wavelet collocation method (HWCM) for the numerical solution of first- and second-order nonlinear hyperbolic equations. The time derivative in the governing equations is approximated by a finite difference. The nonlinear hyperbolic equation is converted into its full algebraic form once the space derivatives are replaced by the finite Haar series. Convergence analysis is performed both in space and time, where the computational results follow the theoretical statements of convergence. Many test problems with different nonlinear terms are presented to verify the accuracy, capability, and convergence of the proposed method for the first- and second-order nonlinear hyperbolic equations.
摘要本文提出了一阶和二阶非线性双曲型方程数值解的Haar小波配点法。控制方程中的时间导数用有限差分近似。将空间导数替换为有限Haar级数,将非线性双曲方程转化为完整的代数形式。在空间和时间上进行了收敛性分析,计算结果符合收敛性的理论表述。为了验证所提方法对一阶和二阶非线性双曲型方程的精度、能力和收敛性,给出了许多不同非线性项的测试问题。
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引用次数: 1
Numerical solution of a malignant invasion model using some finite difference methods 用有限差分法求解恶性侵袭模型
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0244
A. Appadu, Gysbert Nicolaas de Waal
Abstract In this article, one standard and four nonstandard finite difference methods are used to solve a cross-diffusion malignant invasion model. The model consists of a system of nonlinear coupled partial differential equations (PDEs) subject to specified initial and boundary conditions, and no exact solution is known for this problem. It is difficult to obtain theoretically the stability region of the classical finite difference scheme to solve the set of nonlinear coupled PDEs, this is one of the challenges of this class of method in this work. Three nonstandard methods abbreviated as NSFD1, NSFD2, and NSFD3 are considered from the study of Chapwanya et al., and these methods have been constructed by the use of a more general function replacing the denominator of the discrete derivative and nonlocal approximations of nonlocal terms. It is shown that NSFD1, which preserves positivity when used to solve classical reaction-diffusion equations, does not inherit this property when used for the cross-diffusion system of PDEs. NSFD2 and NSFD3 are obtained by appropriate modifications of NSFD1. NSFD2 is positivity-preserving when the functional relationship [ ψ ( h ) ] 2 = 2 ϕ ( k ) {left[psi left(h)]}^{2}=2phi left(k) holds, while NSFD3 is unconditionally dynamically consistent with respect to positivity. First, we show that NSFD2 and NSFD3 are not consistent methods. Second, we tried to modify NSFD2 in order to make it consistent but we were not successful. Third, we extend NSFD3 so that it becomes consistent and still preserves positivity. We denote the extended version of NSFD3 as NSFD5. Finally, we compute the numerical rate of convergence in time for NSFD5 and show that it is close to the theoretical value. NSFD5 is consistent under certain conditions on the step sizes and is unconditionally positivity-preserving.
摘要本文采用一种标准和四种非标准有限差分方法求解交叉扩散恶性侵袭模型。该模型由一个非线性耦合偏微分方程组组成,该方程组受特定的初始和边界条件的约束,目前还不知道该问题的精确解。求解一组非线性耦合偏微分方程的经典有限差分格式在理论上很难获得其稳定域,这是这类方法在本工作中面临的挑战之一。从Chapwanya等人的研究中考虑了三种非标准方法,简称为NSFD1、NSFD2和NSFD3,这些方法是通过使用更通用的函数来代替离散导数的分母和非局部项的非局部近似来构建的。结果表明,NSFD1在求解经典反应扩散方程时保持了正性,而在求解偏微分方程的交叉扩散系统时却没有继承这一性质。NSFD2和NSFD3是通过对NSFD1进行适当的修改而获得的。当函数关系[ψ。首先,我们证明了NSFD2和NSFD3是不一致的方法。其次,我们试图修改NSFD2以使其一致,但没有成功。第三,我们扩展了NSFD3,使其变得一致,并且仍然保持阳性。我们将NSFD3的扩展版本表示为NSFD5。最后,我们计算了NSFD5的数值收敛速度,并表明它接近理论值。NSFD5在步长的某些条件下是一致的,并且是无条件的正性保留。
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引用次数: 0
Fixed-point results for convex orbital operators 凸轨道算子的不动点结果
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0184
O. Popescu
Abstract The aim of this article is to introduce a new type of operator similar to those of A. Petruşel and G. Petruşel type (Fixed point results for decreasing convex orbital operators, J. Fixed Point Theory Appl. 23 (2021), no. 35) and prove some fixed-point theorems which generalize and complement several results in the theory of nonlinear operators.
摘要本文的目的是引入一种类似于a.Petruşel和G.Petruşe l型算子的新型算子(递减凸轨道算子的不动点结果,J.Fixed point Theory Appl.23(2021),no.35),并证明了一些不动点定理,这些定理推广和补充了非线性算子理论中的几个结果。
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引用次数: 4
Normal ordering associated with λ-Stirling numbers in λ-shift algebra λ平移代数中与λ-Stirling数相关的正规序
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0250
Taekyun Kim, Dae San Kim, H. Kim
Abstract It is known that the Stirling numbers of the second kind are related to normal ordering in the Weyl algebra, while the unsigned Stirling numbers of the first kind are related to normal ordering in the shift algebra. Recently, Kim-Kim introduced a λ lambda -analogue of the unsigned Stirling numbers of the first kind and that of the r r -Stirling numbers of the first kind. In this article, we introduce a λ lambda -analogue of the shift algebra (called λ lambda -shift algebra) and investigate normal ordering in the λ lambda -shift algebra. From the normal ordering in the λ lambda -shift algebra, we derive some identities about the λ lambda -analogue of the unsigned Stirling numbers of the first kind.
已知第二类Stirling数与Weyl代数中的正序有关,而第一类无符号Stirling数与移位代数中的正序有关。最近,Kim-Kim引入了第一类无符号斯特林数和第一类r r -斯特林数的λ λ -类比。在本文中,我们介绍了移位代数的λ λ -模拟(称为λ λ -移位代数),并研究了λ λ -移位代数中的正常排序。从λ 平移代数的正规序出发,导出了第一类无符号斯特林数的λ 近似的恒等式。
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引用次数: 0
Investigation of hybrid fractional q-integro-difference equations supplemented with nonlocal q-integral boundary conditions 含非局部q积分边界条件的混合分数阶q积分差分方程的研究
IF 2 3区 数学 Q1 Mathematics Pub Date : 2023-01-01 DOI: 10.1515/dema-2022-0222
A. Alsaedi, B. Ahmad, H. Al-Hutami, Boshra Alharbi
Abstract In this article, we introduce and study a new class of hybrid fractional q q -integro-difference equations involving Riemann-Liouville q q -derivatives, supplemented with nonlocal boundary conditions containing Riemann-Liouville q q -integrals of different orders. The existence of a unique solution to the given problem is shown by applying Banach’s fixed point theorem. We also present the existing criteria for solutions to the problem at hand by applying Krasnoselskii’s fixed point theorem and Leray-Schauder’s nonlinear alternative. Illustrative examples are given to demonstrate the application of the obtained results. Some new results follow as special cases of this work.
摘要本文引入并研究了一类新的杂化分数阶q q -积分-差分方程,该方程包含Riemann-Liouville q q -导数,并补充了包含不同阶Riemann-Liouville q q -积分的非局部边界条件。利用巴拿赫不动点定理,证明了问题解的存在性。我们还利用Krasnoselskii不动点定理和Leray-Schauder的非线性替代给出了现有的问题解的判据。通过实例说明所得结果的应用。作为这项工作的特例,一些新的结果也随之而来。
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引用次数: 0
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Demonstratio Mathematica
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