نتایج جستجو برای: tychonoff fixed point theorem

تعداد نتایج: 802370  

Journal: :Indagationes Mathematicae 2022

We prove the following generalization of Cartwright–Littlewood fixed point theorem. Suppose h : R 2 → is an orientation preserving planar homeomorphism, and X acyclic continuum. Let C be a component ∩ ( ) . If there c ∈ such that O + ⊆ or − then also contains Our result generalizes earlier results Ostrovski Boroński, answers Question from Boroński (2017). The proof inspired by short Cartwright ...

Journal: :Journal of Mathematical Analysis and Applications 1981

Journal: :Applied Mathematics Letters 1998

Journal: :Fundamenta Mathematicae 1975

Journal: :Proceedings of the American Mathematical Society 1978

Journal: :Formalized Mathematics 2011

Journal: :Journal of Mathematics and Computer Science 2017

Journal: :New Trends in Mathematical Science 2019

In the present paper, measure differential equations involving the distributional Henstock-Kurzweil integral are investigated. Theorems on the existence and structure of the set of solutions are established by using Schauder$^prime s$ fixed point theorem and Vidossich theorem. Two examples of the main results paper are presented. The new results are generalizations of some previous results in t...

Journal: :bulletin of the iranian mathematical society 0
a. talabeigi department of mathematics‎, ‎payam noor university‎, ‎tehran‎, iran.

‎let ${x_{alpha}:alphainlambda}$ be a collection of topological spaces‎, ‎and $mathcal {g}_{alpha}$ be a grill on $x_{alpha}$ for each $alphainlambda$‎. ‎we consider tychonoffrq{}s type theorem for $x=prod_{alphainlambda}x_{alpha}$ via the above grills and a natural grill on $x$ ‎related to these grills, and present a simple proof to this theorem‎. ‎this immediately yields the classical theorem...

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