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We prove an equivalence of categories from formal complex structures with formal holomorphic maps to homotopy algebras over a simple operad with its associated homotopy morphisms. We extend this equivalence to complex manifolds. A complex…

Algebraic Topology · Mathematics 2015-01-19 Joan Millès

In this paper, we first get a criterion formula for whether a differential form is holomorphic with respect to the generalized complex structure induced by $\epsilon$. Next, we get the local extensions of $\overline\partial$-closed forms on…

Differential Geometry · Mathematics 2018-03-13 Kang Wei

A neural population responding to multiple appearances of a single object defines a manifold in the neural response space. The ability to classify such manifolds is of interest, as object recognition and other computational tasks require a…

Disordered Systems and Neural Networks · Physics 2022-08-30 Uri Cohen , Haim Sompolinsky

We define here the category of partial differential equations. Special cases of morphisms from an object (equation) are symmetries of the equation and reductions of the equation by a symmetry groups, but there are many other morphisms. We…

Analysis of PDEs · Mathematics 2009-05-29 Marina Prokhorova

We show that on a closed smooth manifold $M$ equipped with $k$ fiber bundle structures whose vertical distributions span the tangent bundle, every smooth diffeomorphism $f$ of $M$ sufficiently close to the identity can be written as a…

Differential Geometry · Mathematics 2007-05-23 Stefan Haller , Josef Teichmann

Criteria for a diffeomorphism of a smooth manifold $M$ to be lifted to a linear automorphism of a given real vector bundle $p\colon V\rightarrow M$, are stated. Examples are included and the metric and complex vector-bundle cases are also…

Differential Geometry · Mathematics 2025-02-04 Jaime Muñoz Masqué , Eugenia Rosado María , Ignacio Sánchez Rodríguez

We consider classification problems for manifolds and discrete subgroups of Lie groups from a descriptive set-theoretic point of view. This work is largely foundational in conception and character, recording both a framework for general…

Logic · Mathematics 2026-01-01 Jeffrey Bergfalk , Iian B. Smythe

A unified summary is given of the existence theory of Stein manifolds in all dimensions, based on published and pending literature. Eliashberg's characterization of manifolds admitting Stein structures requires an extra delicate hypothesis…

Geometric Topology · Mathematics 2010-04-29 Robert E. Gompf

The topological classification of gradient like Morse-Smale vector fields and diffeomorphisms on 3-manifolds was obtained.

Dynamical Systems · Mathematics 2007-05-23 A. O. Prishlyak

This paper is concerned with the theory and applications of varifolds to the representation, approximation and diffeomorphic registration of shapes. One of its purpose is to synthesize and extend several prior works which, so far, have made…

Optimization and Control · Mathematics 2020-11-16 Hsi-Wei Hsieh , Nicolas Charon

In this note we give a direct method to classify all stable forms on $\R^n$ as well as to determine their automorphism groups. We show that in dimension 6,7,8 stable forms coincide with non-degnerate forms. We present necessary conditions…

Differential Geometry · Mathematics 2008-05-03 Hong-Van Le , Martin Panak , Jiri Vanzura

We completely characterize real Bott manifolds up to affine diffeomorphism in terms of three simple matrix operations on square binary matrices obtained from strictly upper triangular matrices by permuting rows and columns simultaneously.…

Algebraic Topology · Mathematics 2025-08-22 Suyoung Choi , Mikiya Masuda , Sang-il Oum

The convenient setting for smooth mappings, holomorphic mappings, and real analytic mappings in infinite dimension is sketched. Infinite dimensional manifolds are discussed with special emphasis on smooth partitions of unity and tangent…

Differential Geometry · Mathematics 2016-09-06 Andreas Kriegl , Peter W. Michor

We give a classification of polarized deformation quantizations on a symplectic manifold with a (complex) polarization. Also, we establish a formula which relates the characteristic class of a polarized deformation quantization to its…

Quantum Algebra · Mathematics 2009-11-07 J. Donin

We obtain complete geometric invariants of cobordism classes of oriented simple fold maps of (n+1)-dimensional manifolds into an n-dimensional manifold N in terms of immersions with prescribed normal bundles. We compute that this cobordism…

Geometric Topology · Mathematics 2009-02-24 Boldizsar Kalmar

We prove a general relative higher index theorem for complete manifolds with positive scalar curvature towards infinity. We apply this theorem to study Riemannian metrics of positive scalar curvature on manifolds. For every two metrics of…

K-Theory and Homology · Mathematics 2012-08-27 Zhizhang Xie , Guoliang Yu

In this paper many classes of sets of matrices with entries in F (F=R, F=C, F=H) are introduced. Each class with the corresponding topology determines a real analytical, complex or symplectic manifold for F=R, F=C or F=H respectively. Any…

Differential Geometry · Mathematics 2007-05-23 Kostadin Trencevski , Samet Kera

This dissertation contains a comprehensive study of the topology of 2-manifolds and a complementary analysis of the work done by Edwin E. Moise, L. V. Ahlfors and Ian Richards. Our aim is to study the well known classification of surfaces.…

Differential Geometry · Mathematics 2019-04-30 Kushal Lalwani

Multimodal classification research has been gaining popularity in many domains that collect more data from multiple sources including satellite imagery, biometrics, and medicine. However, the lack of consistent terminology and architectural…

Machine Learning · Computer Science 2021-09-21 William C. Sleeman , Rishabh Kapoor , Preetam Ghosh

We discuss recent results and open questions on the broad theme of (Nielsen) realization problems. Beyond realizing subgroups of mapping class groups, there are many other natural instances where one can ask if a surjection from a group of…

Geometric Topology · Mathematics 2018-02-05 Kathryn Mann , Bena Tshishiku