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Generalized fixed points for fuzzy and nonfuzzy mappings in strong b-metric spaces 强 b 矩空间中模糊和非模糊映射的广义定点
IF 1.6 3区 数学 Pub Date : 2024-02-14 DOI: 10.1186/s13660-024-03101-9
Shazia Kanwal, Hüseyin Işık, Sana Waheed
The main purpose of this research article is to generalize Kannan-type fixed-point (FP) theorems for single-valued mappings and Chatterjea-type FP result for fuzzy mappings (FMs) in the context of complete strong b-metric spaces (MSs). Moreover, fuzzy FPs are established for Suzuki-type fuzzy contraction in the setting of complete strong b-MSs. The conclusions are supported by nontrivial examples to enhance the validity of the results obtained in this study. In addition, previous findings have been made as corollaries from the relevant literature. The numerous implications that this technique has across the literature improve and integrate our findings. Applications of some of the results obtained are also incorporated.
本文的主要目的是在完全强 b-度量空间(MSs)的背景下,推广单值映射的 Kannan 型定点(FP)定理和模糊映射(FMs)的 Chatterjea 型定点结果。此外,在完全强 b-MS 的背景下,还为铃木型模糊收缩建立了模糊 FP。这些结论得到了非难例的支持,从而增强了本研究结果的有效性。此外,相关文献还对之前的结论进行了推论。这项技术对文献的诸多影响完善并整合了我们的研究结果。本研究还纳入了部分结果的应用。
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引用次数: 0
Approximating fixed points of weak enriched contractions using Kirk’s iteration scheme of higher order 利用柯克高阶迭代方案逼近弱充实收缩的定点
IF 1.6 3区 数学 Pub Date : 2024-02-14 DOI: 10.1186/s13660-024-03097-2
Mi Zhou, Naeem Saleem, Mujahid Abbas
In this paper, we introduce two types of weak enriched contractions, namely weak enriched $mathcal{F}$ -contraction, weak enriched $mathcal{F^{prime}}$ -contraction, and k-fold averaged mapping based on Kirk’s iterative algorithm of order k. The types of contractions introduced herein unify, extend, and generalize several existing classes of enriched and weak enriched contraction mappings. Moreover, K-fold averaged mappings can be viewed as a generalization of the averaged mappings and double averaged mappings. We then prove the existence of a unique fixed point of the k-fold averaged mapping associated with weak enriched contractions introduced herein. We study necessary conditions that guarantee the equality of the sets of fixed points of the k-fold averaged mapping and weak enriched contractions. We show that an appropriate Kirk’s iterative algorithm can be used to approximate a fixed point of a k-fold averaged mapping and of the two weak enriched contractions. We also study the well-posedness, limit shadowing property, and Ulam–Hyers stability of the k-fold averaged mapping. We provide necessary conditions that ensure the periodic point property of each illustrated weak enriched contraction. Some examples are presented to show that our results are a potential generalization of the comparable results in the existing literature.
本文介绍了两种弱富集收缩,即弱富集 $mathcal{F}$ -收缩、弱富集 $mathcal{F^/{prime}}$ -收缩以及基于 Kirk 阶迭代算法的 k 折平均映射。本文介绍的收缩类型统一、扩展和概括了现有的几类富集和弱富集收缩映射。此外,K 折平均映射可以看作是平均映射和双平均映射的一般化。然后,我们证明了与本文引入的弱富集收缩相关的 K 折平均映射的唯一定点的存在性。我们研究了保证 k 折平均映射和弱充实收缩的定点集相等的必要条件。我们证明,可以使用适当的柯克迭代算法来逼近 k 折平均映射和两个弱充实收缩的定点。我们还研究了 k 折平均映射的好拟性、极限阴影特性和 Ulam-Hyers 稳定性。我们提供了确保每个图示弱增益收缩的周期点性质的必要条件。我们列举了一些例子来说明我们的结果是对现有文献中类似结果的潜在概括。
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引用次数: 0
Viscosity extragradient with modified inertial method for solving equilibrium problems and fixed point problem in Hadamard manifold 用修正惯性法解决哈达玛流形中的平衡问题和定点问题的粘度外梯度法
IF 1.6 3区 数学 Pub Date : 2024-02-13 DOI: 10.1186/s13660-024-03099-0
P. V. Ndlovu, L. O. Jolaoso, M. Aphane, H. A. Abass
In this article, we propose a viscosity extragradient algorithm together with an inertial extrapolation method for approximating the solution of pseudomonotone equilibrium and fixed point problem of a nonexpansive mapping in the setting of a Hadamard manifold. We prove that the sequence generated by our iterative method converges to a solution of the above problems under some mild conditions. Finally, we outline some implications of our results and present several numerical examples showing the implementability of our algorithm. The results of this article extend and complement many related results in linear spaces.
在本文中,我们提出了一种粘度外梯度算法和惯性外推法,用于在哈达玛流形环境中近似求解非展开映射的伪单调平衡和定点问题。我们证明,在一些温和的条件下,我们的迭代法产生的序列会收敛到上述问题的解。最后,我们概述了我们的结果的一些意义,并给出了几个数值示例,展示了我们算法的可实施性。本文的结果扩展并补充了线性空间中的许多相关结果。
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引用次数: 0
A note on Lototsky–Bernstein bases 关于洛托茨基-伯恩斯坦基的说明
IF 1.6 3区 数学 Pub Date : 2024-02-06 DOI: 10.1186/s13660-024-03076-7
Xiao-Wei Xu, Xin Yu, Jia-Lin Cui, Qing-Bo Cai, Wen-Tao Cheng
In this note, we study some approximation properties on a class of special Lototsky–Bernstein bases. We focus on approximation of $|x|$ on $[-1,1]$ by an approximation process generated from fixed points on Lototsky–Bernstein bases. Our first result shows that the approximation procedure $p_{n}(x)$ to $|x|$ preserves good shapes on $[-1,1]$ . Moreover, some convergence results and inequalities are derived. Our second main result states that the rate convergence of the approximation is $O(n^{-2})$ .
在本论文中,我们将研究一类特殊 Lototsky-Bernstein 基的近似性质。我们的重点是通过由 Lototsky-Bernstein 基上的定点生成的近似过程来近似 $[-1,1]$[-1,1]$ 上的 $|x|$。我们的第一个结果表明,$p_{n}(x)$ 对 $|x|$ 的逼近过程保留了 $[-1,1]$ 上的良好形状。此外,我们还得出了一些收敛结果和不等式。我们的第二个主要结果表明,近似的收敛速率为 $O(n^{-2})$ 。
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引用次数: 0
Multiple positive solutions for Schrödinger-Poisson system with singularity on the Heisenberg group 海森堡群上有奇点的薛定谔-泊松系统的多重正解
IF 1.6 3区 数学 Pub Date : 2024-02-05 DOI: 10.1186/s13660-024-03096-3
Guaiqi Tian, Yucheng An, Hongmin Suo
In this work, we study the following Schrödinger-Poisson system $$ textstylebegin{cases} -Delta _{H}u+mu phi u=lambda u^{-gamma}, &text{in } Omega , -Delta _{H}phi =u^{2}, &text{in } Omega , u>0, &text{in } Omega , u=phi =0, &text{on } partial Omega , end{cases} $$ where $Delta _{H}$ is the Kohn-Laplacian on the first Heisenberg group $mathbb{H}^{1}$ , and $Omega subset mathbb{H}^{1}$ is a smooth bounded domain, $mu =pm 1$ , $00$ are some real parameters. For the above system, we prove the existence and uniqueness of positive solution for $mu =1$ and each $lambda >0$ . Multiple solutions of the system are also considered for $mu =-1$ and $lambda >0$ small enough using the critical point theory for nonsmooth functional.
在这项工作中,我们研究了以下薛定谔-泊松系统 $$ textstylebegin{cases} -Delta _{H}u+mu phi u=lambda u^{-gamma}, &text{in }.-Delta _{H} u =u^{2}, &text{in }u>0, &text{in }u=phi =0, &text{on }end{cases} $$ 其中 $Delta _{H}$ 是第一个海森堡群 $mathbb{H}^{1}$ 上的 Kohn-Laplacian ,而 $Omega subset mathbb{H}^{1}$ 是一个光滑的有界域,$mu =pm 1$ , $00$ 是一些实数参数。对于上述系统,我们证明了 $mu =1$ 和每个 $lambda >0$ 的正解的存在性和唯一性。利用非光滑函数的临界点理论,我们还考虑了在 $mu =-1$ 和 $lambda >0$ 足够小的情况下系统的多解。
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引用次数: 0
Higher order ((n,m))-Drazin normal operators 高阶((n,m))-德拉津正则算子
IF 1.6 3区 数学 Pub Date : 2024-02-01 DOI: 10.1186/s13660-024-03095-4
Hadi Obaid AlShammari
The purpose of this paper is to introduce and study the structure of p-tuple of $(n,m)$ - $mathcal{D}$ -normal operators. This is a generalization of the class of p-tuple of n-normal operators. We consider a generalization of these single variable n- $mathcal{D}$ -normal and $(n,m)$ - $mathcal{D}$ -normal operators and explore some of their basic properties.
本文旨在介绍和研究 $(n,m)$ - $mathcal{D}$ 正则算子的 p-tuple 结构。这是 n 常算子 p 元组类的广义化。我们考虑了这些单变量 n- $mathcal{D}$ - 常算子和 $(n,m)$ - $mathcal{D}$ - 常算子的一般化,并探讨了它们的一些基本性质。
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引用次数: 0
Inverse logarithmic coefficient bounds for starlike functions subordinated to the exponential functions 从属于指数函数的星形函数的反对数系数边界
IF 1.6 3区 数学 Pub Date : 2024-01-31 DOI: 10.1186/s13660-024-03094-5
Lei Shi, Muhammad Abbas, Mohsan Raza, Muhammad Arif, Poom Kumam
In recent years, many subclasses of univalent functions, directly or not directly related to the exponential functions, have been introduced and studied. In this paper, we consider the class of $mathcal{S}^{ast}_{e}$ for which $zf^{prime}(z)/f(z)$ is subordinate to $e^{z}$ in the open unit disk. The classic concept of Hankel determinant is generalized by replacing the inverse logarithmic coefficient of functions belonging to certain subclasses of univalent functions. In particular, we obtain the best possible bounds for the second Hankel determinant of logarithmic coefficients of inverse starlike functions subordinated to exponential functions. This work may inspire to pay more attention to the coefficient properties with respect to the inverse functions of various classes of univalent functions.
近年来,人们引入并研究了许多与指数函数直接或不直接相关的单值函数子类。在本文中,我们考虑了$zf^{prime}(z)/f(z)$在开放单位盘中从属于$e^{z}$的$mathcal{S}^{ast}_{e}$类。通过替换属于某些单值函数子类的函数的逆对数系数,我们对汉克尔行列式的经典概念进行了概括。特别是,我们得到了从属于指数函数的反星形函数对数系数的第二汉克尔行列式的最佳边界。这项工作可能会启发人们更多地关注与各类单值函数的逆函数有关的系数性质。
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引用次数: 0
Faber polynomial coefficient inequalities for bi-Bazilevič functions associated with the Fibonacci-number series and the square-root functions 与斐波那契数列和平方根函数相关的双巴齐莱维奇函数的法布尔多项式系数不等式
IF 1.6 3区 数学 Pub Date : 2024-01-31 DOI: 10.1186/s13660-024-03090-9
H. M. Srivastava, Shahid Khan, Sarfraz Nawaz Malik, Fairouz Tchier, Afis Saliu, Qin Xin
Two new subclasses of the class of bi-Bazilevič functions, which are related to the Fibonacci-number series and the square-root functions, are introduced and studied in this article. Under a special choice of the parameter involved, these two classes of Bazilevič functions reduce to two new subclasses of star-like biunivalent functions related with the Fibonacci-number series and the square-root functions. Using the Faber polynomial expansion (FPE) technique, we find the general coefficient bounds for the functions belonging to each of these classes. We also find bounds for the initial coefficients for bi-Bazilevič functions and demonstrate how unexpectedly these initial coefficients behave in relation to the square-root functions and the Fibonacci-number series.
本文介绍并研究了与斐波纳契数列和平方根函数相关的双巴齐列维奇函数类的两个新子类。在所涉及参数的特殊选择下,这两类巴齐列维奇函数简化为与斐波纳契数列和平方根函数相关的两个新的星状双等价函数子类。利用法布尔多项式展开(FPE)技术,我们找到了属于这两类函数的一般系数边界。我们还找到了 bi-Bazilevič 函数的初始系数边界,并证明了这些初始系数与平方根函数和斐波那契数列的关系是多么出人意料。
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引用次数: 0
Hankel determinant for a general subclass of m-fold symmetric biunivalent functions defined by Ruscheweyh operators 由 Ruscheweyh 算子定义的 m 折对称双等价函数一般子类的汉克尔行列式
IF 1.6 3区 数学 Pub Date : 2024-01-30 DOI: 10.1186/s13660-024-03088-3
Pishtiwan Othman Sabir, Ravi P. Agarwal, Shabaz Jalil Mohammedfaeq, Pshtiwan Othman Mohammed, Nejmeddine Chorfi, Thabet Abdeljawad
Making use of the Hankel determinant and the Ruscheweyh derivative, in this work, we consider a general subclass of m-fold symmetric normalized biunivalent functions defined in the open unit disk. Moreover, we investigate the bounds for the second Hankel determinant of this class and some consequences of the results are presented. In addition, to demonstrate the accuracy on some functions and conditions, most general programs are written in Python V.3.8.8 (2021).
在这项工作中,我们利用汉克尔行列式和 Ruscheweyh 导数,考虑了定义在开放单位盘中的 m 折对称归一化双等价函数的一般子类。此外,我们还研究了该类函数的第二汉克尔行列式的边界,并给出了结果的一些后果。此外,为了证明某些函数和条件的准确性,我们使用 Python V.3.8.8 (2021) 编写了大部分通用程序。
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引用次数: 0
Some multidimensional fixed point theorems for nonlinear contractions in C-distance spaces with applications C 距离空间中非线性收缩的一些多维定点定理及其应用
IF 1.6 3区 数学 Pub Date : 2024-01-30 DOI: 10.1186/s13660-024-03079-4
Maliha Rashid, Naeem Saleem, Rabia Bibi, Reny George
In this manuscript, we use the concept of multidimensional fixed point in a generalized space, namely, C-distance space with some nonlinear contraction conditions, such as Jaggi- and Dass-Gupta-type contractions. We provide results with a Jaggi-type hybrid contraction for the mentioned space. Moreover, we use control functions to get the desired results. After each theorem, we compare our results with previous ones to show that they are generalized. We provide examples to support our results. An application is also performed to solve the system of integral equations.
在本手稿中,我们使用了广义空间中多维定点的概念,即带有一些非线性收缩条件(如 Jaggi- 和 Dass-Gupta 型收缩)的 C-距离空间。我们为上述空间提供了 Jaggi- 型混合收缩的结果。此外,我们还使用控制函数来获得所需的结果。在每条定理之后,我们都会将我们的结果与之前的结果进行比较,以证明这些结果是通用的。我们提供了一些例子来支持我们的结果。此外,我们还将应用这些定理求解积分方程组。
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引用次数: 0
期刊
Journal of Inequalities and Applications
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