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Incidence relations among the cells of a regular CW complex produce a poset-enriched category of entrance paths whose classifying space is homotopy-equivalent to that complex. We show here that each acyclic partial matching (in the sense of…

Algebraic Topology · Mathematics 2018-06-05 Vidit Nanda

Morse theory relates algebraic topology invariants and the dynamics of the gradient flow of a Morse function, allowing to derive information about one out of the other. In the case of the homology, the construction extends to much more…

Symplectic Geometry · Mathematics 2024-10-11 Jean-François Barraud , Florian Bertuol

The recent interest of geometers in the $f$-structures of K. Yano is motivated by the study of the dynamics of contact foliations, as well as their applications in theoretical physics. Weak metric $f$-structures on a smooth manifold,…

Differential Geometry · Mathematics 2025-10-06 Vladimir Rovenski

We introduce a new higher categorical structure called a weakly globular n-fold category. This structure is based on iterated internal categories and on the notion of weak globularity. We identify a suitable class of pseudo-functors whose…

Category Theory · Mathematics 2016-05-24 Simona Paoli

Our objective is to develop a stratified Morse theory with tangential conditions. We define a continuous strata-wise smooth Morse function on an abstract stratified space by using control conditions and radiality assumptions on the gradient…

Geometric Topology · Mathematics 2010-11-25 Ursula Ludwig

Every smooth manifold contains particles which propagate. These form objects and morphisms of a category equipped with a functor to the category of Abelian groups, turning this into a 0+1 topological field theory. We investigate the…

Symplectic Geometry · Mathematics 2009-06-26 Jean-Yves Welschinger

A weak mixed distributive law (also called weak entwining structure) in a 2-category consists of a monad and a comonad, together with a 2-cell relating them in a way which generalizes a mixed distributive law due to Beck. We show that a…

Category Theory · Mathematics 2012-01-27 Gabriella Böhm , Stephen Lack , Ross Street

We twist the monopole equations of Seiberg and Witten and show how these equations are realized in topological Yang-Mills theory. A Floer derivative and a Morse functional are found and are used to construct a unitary transformation between…

High Energy Physics - Theory · Physics 2009-10-28 R. Brooks , A. Lue

In this paper, we provide a direct and constructive proof of weak factorization of $h^1(\mathbb{R})$ (the predual of little BMO space bmo$(\mathbb{R}\times\mathbb{R})$ studied by Cotlar-Sadosky and Ferguson-Sadosky), i.e., for every $f\in…

Classical Analysis and ODEs · Mathematics 2017-06-19 Xuan Thinh Duong , Ji Li , Brett D. Wick , Dongyong Yang

We give simple and unified proofs of weak holomorhpic Morse inequalities on complete manifolds, $q$-convex manifolds, pseudoconvex domains, weakly $1$-complete manifolds and covering manifolds. This paper is essentially based on the…

Complex Variables · Mathematics 2023-07-24 Xiaoshan Li , Guokuan Shao , Huan Wang

We consider certain categorical structures that are implicit in subfactor theory. Making the connection between subfactor theory (at finite index) and category theory explicit sheds light on both subjects. Furthermore, it allows various…

Category Theory · Mathematics 2007-05-23 Michael Mueger

In this paper, we define a class of relative derived functors in terms of left or right weak flat resolutions to compute the weak flat dimension of modules. Moreover, we investigate two classes of modules larger than that of weak injective…

Rings and Algebras · Mathematics 2017-04-11 Tiwei Zhao

For a Morse function f on a compact oriented manifold M, we show that f has more critical points than the number required by the Morse inequalities if and only if there exists a certain class of link in M whose components have nontrivial…

Geometric Topology · Mathematics 2014-09-10 Michael Usher

Two meromorphic functions $f$ and $g$ are said to weakly share a small function $a$ with bi-weight $(n,k)$ if the functions $f-a$ and $g-a$ have the same zeros with multiplicities truncated at level $n+1$, while zeros whose multiplicities…

Complex Variables · Mathematics 2026-05-27 Si Duc Quang , Phung Nguyen Ngoc Anh

In these lecture notes we discuss a body of work in which Morse theory is used to construct various homology and cohomology operations. In the classical setting of algebraic topology this is done by constructing a moduli space of graph…

Geometric Topology · Mathematics 2007-05-23 Ralph L. Cohen

We prove that two dual operator algebras are weak$^*$ Morita equivalent if and only if they have equivalent categories of dual operator modules via completely contractive functors which are also weak$^*$-continuous on appropriate morphism…

Operator Algebras · Mathematics 2008-10-17 Upasana Kashyap

We establish an Eichler-Shimura isomorphism for weakly modular forms of level one. We do this by relating weakly modular forms with rational Fourier coefficients to the algebraic de Rham cohomology of the modular curve with twisted…

Number Theory · Mathematics 2018-06-20 Francis Brown , Richard Hain

Getzler-Jones-Petrack introduced $A_\infty$ structures on the equivariant complex for manifold $M$ with smooth $\mathbb{S}^1$ action, motivated by geometry of loop spaces. Applying Witten's deformation by Morse functions followed by…

Differential Geometry · Mathematics 2019-01-29 Ziming Nikolas Ma

We study the behavior of $\mathrm{Pin}(2)$-monopole Floer homology under connected sums. After constructing a (partially defined) $\mathcal{A}_{\infty}$-module structure on the $\mathrm{Pin}(2)$-monopole Floer chain complex of a three…

Geometric Topology · Mathematics 2017-09-20 Francesco Lin

We present a set of notes on Morse Homology, which grew out of lectures the first named autor gave at Ludwig-Maximilian University in Munich, Seoul National University, and the University of Augsburg. Although we do not discuss Floer…

Algebraic Topology · Mathematics 2020-05-25 Urs Frauenfelder , Robert Nicholls