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This paper is a continuation of work started in \cite{njampavcont} on preserving continuity in ideal topological spaces. We will deal with $\theta$-continuity and weak continuity and give their translations in ideal topological spaces. As…

一般拓扑 · 数学 2022-12-06 Anika Njamcul , Aleksandar Pavlović

In a recent breakthrough, Gilmer proved the union closed conjecture up to a constant factor. Using Gilmer's method and additional ideas, Chase and Lovett proved an optimal result for almost union-closed set systems. Here that result is…

组合数学 · 数学 2023-02-27 Raphael Yuster

A Cech closure space $(X,u)$ is a set $X$ with a (Cech) closure operator $u$ which need not be idempotent. Many properties which hold in topological spaces hold in Cech closure spaces as well. The notions of proper (splitting) and…

一般拓扑 · 数学 2007-05-23 Mila Mrsevic

In this paper, we prove almost Schur Lemma on closed smooth metric measure spaces, which implies the results of X. Cheng and De Lellis-Topping whenever the weighted function f is constant.

微分几何 · 数学 2019-06-28 Jui-Tang Chen

We find (completeness type) conditions on topological semilattices $X,Y$ guaranteeing that each continuous homomorphism $h:X\to Y$ has closed image $h(X)$ in $Y$.

一般拓扑 · 数学 2021-11-01 Taras Banakh , Serhii Bardyla

We introduce a fairly general concept of functional equation for $k$-tuples of functions $f_1,\dots,f_k\colon X \to Y$ between arbitrary sets. The homomorphy equations for mappings between groups and other algebraic systems, as well as…

泛函分析 · 数学 2015-10-19 Pavol Zlatoš

Kostyrko and Salat showed that if a linear space of bounded functions has an element that is discontinuous almost everywhere, then a typical element in the space is discontinuous almost everywhere. We give a topological analogue of this…

经典分析与常微分方程 · 数学 2011-03-11 Shingo Saito

Over a large class of function fields, we show that the solutions of some linear equations in the topological closure of a certain subgroup of the group of units in the function field are exactly the solutions that are already in the…

数论 · 数学 2012-04-20 Chia-Liang Sun

We axiomatize and generalize Markov's approach to the continuity problem for Type 1 computable functions, i.e. the problem of finding sufficient conditions on a computable topological space to obtain a theorem of the form "computable…

逻辑 · 数学 2024-12-12 Emmanuel Rauzy

We discuss topological versions of the closed graph theorem, where continuity is inferred from near continuity in tandem with suitable conditions on source or target spaces. We seek internal characterizations of spaces satisfying a closed…

一般拓扑 · 数学 2024-04-05 Dominikus Noll

A continuous solution of an algebraic equation with holomorphic almost periodic coefficients is also almost periodic.

复变函数 · 数学 2007-05-23 V. Britik , S. Favorov

In my PhD thesis a version of Shelah's Presentation Theorem in the setting of Metric Abstract Elementary Classes was proved, where we claimed that the new function symbols are not necessarily uniformly continuous. In this paper we provide a…

逻辑 · 数学 2015-04-22 Pedro Zambrano

We use the recently introduced \'etale open topology to prove several facts about large fields. We show that these facts lift to a very general topological setting.

代数几何 · 数学 2021-03-12 Erik Walsberg

In this paper, we derive more on $\alpha^{m}$-continuous functions and $\alpha^{m}$-irresolute functions with $\alpha^{m}$-open maps and $\alpha^{m}$-closed maps in topological spaces also we introduce $I_{\alpha^{m}}(A)$ and…

一般拓扑 · 数学 2016-01-15 R. Parimelazhagan , Milby Mathew

We show that for ideals primary to a maximal ideal in a normal domain of finite type over the complex numbers, its tight closure is contained inside the continuous closure.

交换代数 · 数学 2017-12-04 Holger Brenner , Jonathan Steinbuch

Let $X$ be a compact K\"ahler manifold and $\theta$ a smooth closed $(1,1)$-real form representing a big cohomology class $\alpha \in H^{1,1}(X,\R)$. The purpose of this note is to show, using pluripotential and viscosity techniques, that…

复变函数 · 数学 2013-11-13 Philippe Eyssidieux , Vincent Guedj , Ahmed Zeriahi

A new continuity for set-valued functions is introduced, and an existence theorem is proved for such continuous set-valued functions.

数值分析 · 数学 2009-01-13 Alexandre Goldsztejn

In this article we introduce a class of discontinuous almost automorphic functions which appears naturally in the study of almost automorphic solutions of differential equations with piecewise constant argument. Their fundamental properties…

经典分析与常微分方程 · 数学 2013-06-06 A. Chavez , S. Castillo , M. Pinto

In this paper we introduce an equivalence relation on the classes of almost periodic functions of a real or complex variable which is used to refine Bochner's result that characterizes these spaces of functions. In fact, with respect to the…

复变函数 · 数学 2019-03-18 J. M. Sepulcre , T. Vidal

We give a new proof of a characterization of the closeness of the range of a continuous linear operator and of the closeness of the sum of two closed vector subspaces of a Banach space. Then we state sufficient conditions for the closeness…

泛函分析 · 数学 2015-10-06 Joël Blot , Philippe Cieutat
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