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The authors lay the foundations for the study of normal families of holomorphic functions and mappings on an infinite-dimensional normed linear space. Characterizations of normal families, in terms of value distribution, spherical…

Complex Variables · Mathematics 2007-05-23 Kang-Tae Kim , Steven Krantz

We give a full characterization of embeddings of the unit circle that admit a Sobolev homeomorphic extension to the unit disk. As a direct corollary, we establish that for quasiconvex target domains $\mathbb Y$, any homeomorphism $\varphi…

Complex Variables · Mathematics 2025-03-28 Aleksis Koski , Jani Onninen , Haiqing Xu

For a discrete poset $\mathcal X$ McCord proved that the natural map $|{\mathcal X}|\to {\mathcal X}$ from the order complex to the poset equipped with the Up topology is a weak homotopy equivalence. Much later, Zivaljevi\'{c} defined the…

Combinatorics · Mathematics 2024-05-30 Ulysses Alvarez , Ross Geoghegan

A class of space mappings of finite distortion with $N$ and $N^{\,-1}$ Luzin properties with respect to $k$-measured area is investigated. It is proved that, mappings mentioned above satisfy upper and lower inequalities for families of…

Complex Variables · Mathematics 2016-09-27 Evgeny Sevost'yanov

In this thesis, we introduce the subject of D-spaces and some of its most important open problems which are related to well known covering properties. We then introduce a new approach for studying D-spaces and covering properties in…

General Topology · Mathematics 2025-04-17 Talal Alrawajfeh , Hasan Z. Hdeib

We develop a theory of tubular neighborhoods for the lower strata in manifold stratified spaces with two strata. In these topologically stratified spaces, manifold approximate fibrations and teardrops play the role that fibre bundles and…

Geometric Topology · Mathematics 2012-06-12 Bruce Hughes , Laurence R. Taylor , Shmuel Weinberger , Bruce Williams

In this paper, we prove a general second main theorem for meromorphic mappings into a subvariety $V$ of $\mathbb P^N(\mathbb C)$ with an arbitrary family of moving hypersurfaces. Our second main theorem generalizes and improves all previous…

Complex Variables · Mathematics 2022-06-01 Si Duc Quang

Stable fold maps are fundamental tools in a generalization of the theory of Morse functions on smooth manifolds and its application to studies of geometric properties of smooth manifolds. Round fold maps were introduced as stable fold maps…

Algebraic Topology · Mathematics 2019-05-14 Naoki Kitazawa

In this paper we provide explicit dual Ramsey statements for several classes of finite relational structures (such as finite linearly ordered graphs, finite linearly ordered metric spaces and finite posets with a linear extension) and…

Combinatorics · Mathematics 2018-07-31 Dragan Mašulović

The purpose of this paper is to study the approximation of vector valued mappings defined on a subset of a normed space. We investigate Korovkin-type conditions under which a given sequence of linear operators becomes a so-called…

Functional Analysis · Mathematics 2007-05-23 Lorenzo D'Ambrosio

Let $\mathcal F\subset 2^{[n]}$ be an $s$-uniform family such that every two distinct sets have a nonempty intersection but intersect in at most $k$ elements. By the well-known Ray-Chaudhuri--Wilson theorem, since the intersections can take…

Combinatorics · Mathematics 2026-05-26 Kristina Ago , Gyula O. H. Katona

We describe a very general (nonlinear) Fredholm theory for a new class of ambient spaces, called polyfolds. This theory is applicable to Gromov-Witten and Floer Theory as well as Symplectic Field Theory. It should also be applicable to a…

Symplectic Geometry · Mathematics 2007-05-23 Helmut H. Hofer

In this paper we present some approaches to classification of almost complex structures and to construction of local or formal pseudoholomorphic mapping from one almost complex manifold to another. The corresponding criteria are given in…

dg-ga · Mathematics 2008-02-03 Boris S. Kruglikov

We study the Borsuk-Ulam theorem for triple (M;\tau; \R^n), where M is a compact, connected, 3-manifold equipped with a fixed-point-free involution \tau. The largest value of n for which the Borsuk-Ulam theorem holds is called the Z_2-index…

Algebraic Topology · Mathematics 2021-02-02 Chahrazade Matmat , Christian Blanchet

In this paper, we consider the CQ projection method and the shrinking projection method given by a finite family of nonexpansive mappings of the unit sphere of a real Hilbert space, and prove strong convergence theorems to common fixed…

Functional Analysis · Mathematics 2020-02-18 Tatsuki Ezawa

We provide a general framework to study convergence properties of families of maps. For manifolds $M$ and $N$ where $M$ is equipped with a volume form $\mathcal{V}$ we consider families of maps in the collection $\{(\phi, B) : B \subset M,…

Differential Geometry · Mathematics 2014-06-18 Joseph Palmer

Let $M\subset \mathbb C^n$ be a real analytic hypersurface, $M'\subset \mathbb C^N$ $(N\geq n)$ be a strongly pseudoconvex real algebraic hypersurface of the special form and $F$ be a meromorphic mapping in a neighborhood of a point $p\in…

Complex Variables · Mathematics 2020-02-28 Ozcan Yazici

Let $k$, $t$ and $m$ be positive integers. A $k$-multiset of $[m]$ is a collection of $k$ integers from the set $\{1,...,m\}$ in which the integers can appear more than once. We use graph homomorphisms and existing theorems for intersecting…

Combinatorics · Mathematics 2015-05-28 Karen Meagher , Alison Purdy

We prove locality of superconformal algebras: every pluperfect superconformal algebra is spanned by coefficients of a finite family of mutually local distributions. We also introduce quasi-Poisson algebras and show that they can be used to…

Representation Theory · Mathematics 2020-06-08 Yuly Billig

We show that the Nielsen-Thurston classification of mapping classes of the sphere with four marked points is determined by the quantum SU(n)-representations, for any fixed integer $n \geq 2$. In the Pseudo-Anosov case we also show that the…

Geometric Topology · Mathematics 2007-05-23 Jorgen Ellegaard Andersen , Gregor Masbaum , Kenji Ueno