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We develop a fixed-point iterative algorithm that computes the matrix projection with respect to the Bures distance on the set of positive definite matrices that are invariant under some symmetry. We prove that the fixed-point iteration…

量子物理 · 物理学 2025-12-23 Shrigyan Brahmachari , Roberto Rubboli , Marco Tomamichel

We propose a new algorithm that finds an $\varepsilon$-approximate fixed point of a smooth function from the $n$-dimensional $\ell_2$ unit ball to itself. We use the general framework of finding approximate solutions to a variational…

计算机科学与博弈论 · 计算机科学 2025-01-22 Idan Attias , Yuval Dagan , Constantinos Daskalakis , Rui Yao , Manolis Zampetakis

This paper studies the problem of stability of a parameterized delay differential equations (DDE see equation (0.1)). After discretizing the DDE (0.1), we show that the problem can be equivalently casted into a semi-definite programming…

最优化与控制 · 数学 2017-01-03 Dongcai Su

We survey several applications of fixed point theorems in the theory of invariant subspaces. The general idea is that a fixed point theorem applied to a suitable map yields the existence of invariant subspaces for an operator on a Banach…

算子代数 · 数学 2012-10-23 Rafa Espínola , Miguel Lacruz

It is generally known that in order to solve the split equality fixed-point problem (SEFPP), it is necessary to compute the norm of bounded and linear operators, which is a challenging task in real life, to address this issue, we studied…

综合数学 · 数学 2024-04-01 Lawan Bulama Mohammed , Adem Kilicman

We obtain sufficient conditions for existence of unique fixed point of Kannan type mappings on complete metric spaces and on generalized complete metric spaces depended an another function.

泛函分析 · 数学 2009-03-10 S. Moradi

We consider constrained Horn clause solving from the more general point of view of solving formula equations. Constrained Horn clauses correspond to the subclass of Horn formula equations. We state and prove a fixed-point theorem for Horn…

计算机科学中的逻辑 · 计算机科学 2021-09-13 Stefan Hetzl , Johannes Kloibhofer

In this article we discuss a possibility to implement a well-known scheme of proof for contraction mapping theorems in a situation, when convergence, families of Cauchy sequences, and contractiveness of mappings are defined axiomatically.…

泛函分析 · 数学 2023-07-13 Vladyslav Babenko , Vira Babenko , Oleg Kovalenko

We present a fixed point theorem on topological cylinders in normed linear spaces for maps satisfying a property of stretching a space along paths. This result is a generalization of a similar theorem obtained by D. Papini and F. Zanolin.…

一般拓扑 · 数学 2015-03-27 Guglielmo Feltrin

In this paper, the purpose is to introduce and study a new modified shrinking projection algorithm with inertial effects, which solves split common fixed point problems in Banach spaces. The corresponding strong convergence theorems are…

最优化与控制 · 数学 2020-08-31 Zheng Zhou , Bing Tan , Songxiao Li

We present two methods to algorithmically compute both least and greatest solutions of polynomial equation systems over absorptive semirings (with certain completeness and continuity assumptions), such as the tropical semiring. Both methods…

计算机科学中的逻辑 · 计算机科学 2021-08-17 Matthias Naaf

\"{O}zavsar and Cevikel(Fixed point of multiplicative contraction mappings on multiplicative metric space.arXiv:1205.5131v1 [math.GN] 23 may 2012)initiated the concept of the multiplicative metric space in such a way that the usual…

综合数学 · 数学 2014-12-30 Muhammad Sarwar , Badshah-e-Rome

We generalize the results of Sehgal and Guseman for mappings on a complete metric space with a contractive iterate condition at each point.

泛函分析 · 数学 2015-04-13 Samet Karaibryamov , Boyan Zlatanov

In this paper, we generalized the classical Fermat point, proved the sufficient and necessary condition for uniqueness and existence for the generalized Fermat point(GFP) theorem, and discuss some interesting geometric property of the…

度量几何 · 数学 2013-06-07 Yao Xiao , Zhang Zhao , Zhang Han , Zeng Yong

In this paper we generalize the results shown by Das and Peterson. Let $M$ be a ${\rm II}_1$-factor acting on $L^2(M)$. We consider certain unital normal completely positive maps on $B(L^2(M))$ which are identity on $M$. We investigate…

算子代数 · 数学 2021-03-09 Tomohiro Hayashi

We introduce and study a general concept of multiple fixed point for mappings defined on partially ordered distance spaces in the presence of a contraction type condition and appropriate monotonicity properties. This notion and the obtained…

综合数学 · 数学 2017-01-04 Mitrofan M. Choban , Vasile Berinde

We propose a general proximal algorithm for the inversion of ill-conditioned matrices. This algorithm is based on a variational characterization of pseudo-inverses. We show that a particular instance of it (with constant regularization…

数值分析 · 数学 2009-04-07 Pierre Maréchal , Aude Rondepierre

The goal of this paper is to promote the use of fixed point strategies in data science by showing that they provide a simplifying and unifying framework to model, analyze, and solve a great variety of problems. They are seen to constitute a…

最优化与控制 · 数学 2021-08-11 Patrick L. Combettes , Jean-Christophe Pesquet

The problem of change-point estimation is considered under a general framework where the data are generated by unknown stationary ergodic process distributions. In this context, the consistent estimation of the number of change-points is…

机器学习 · 统计学 2013-02-15 Azaden Khaleghi , Daniil Ryabko

In this paper a generalized topological central point theorem is proved for maps of a simplex to finite-dimensional metric spaces. Similar generalizations of the Tverberg theorem are considered.

代数拓扑 · 数学 2012-02-07 R. N. Karasev
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