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In this paper, we give both positive and negative answers to Gromov's compactness question regarding positive scalar curvature metrics on noncompact manifolds. First we construct examples that give a negative answer to Gromov's compactness…

Differential Geometry · Mathematics 2023-02-07 Shmuel Weinberger , Zhizhang Xie , Guoliang Yu

Let A be an associative algebra over a field, and let M be a finite family of right A-modules. Study of the noncommutative deformation functor of the family M leads to the construction of the algebra of observables and the Generalized…

Algebraic Geometry · Mathematics 2017-04-19 Eivind Eriksen

The aim of Part II is to explore the technique of invariance of tautological equations in the realm of Gromov--Witten theory. The main result is a proof of Invariance Theorem (Invariance Conjecture~1 in [14]), via the techniques from…

Algebraic Geometry · Mathematics 2007-05-23 Y. -P. Lee

We extend the theory of Thom spectra and the associated obstruction theory for orientations in order to support the construction of the string orientation of tmf, the spectrum of topological modular forms. We also develop the analogous…

Algebraic Topology · Mathematics 2017-05-17 Matthew Ando , Andrew J. Blumberg , David Gepner , Michael J. Hopkins , Charles Rezk

In this paper we consider the problem of graph-based transductive classification, and we are particularly interested in the directed graph scenario which is a natural form for many real world applications. Different from existing research…

Computer Vision and Pattern Recognition · Computer Science 2014-03-19 Jaydeep De , Xiaowei Zhang , Li Cheng

We have developed a mathematical theory of the topological vertex--a theory that was original proposed by M. Aganagic, A. Klemm, M. Marino, and C. Vafa in hep-th/0305132 on effectively computing Gromov-Witten invariants of smooth toric…

Algebraic Geometry · Mathematics 2014-11-11 Jun Li , Chiu-Chu Melissa Liu , Kefeng Liu , Jian Zhou

We study the space of slice-torus invariants. In particular we characterize the set of values that slice-torus invariants may take on a given knot in terms of the stable smooth slice genus. Our study reveals that the resolution of the local…

Geometric Topology · Mathematics 2024-07-12 Peter Feller , Lukas Lewark , Andrew Lobb

We introduce volume forms on mapping stacks in derived algebraic geometry using a parametrized version of the Reidemeister-Turaev torsion. In the case of derived loop stacks we describe this volume form in terms of the Todd class. In the…

Algebraic Geometry · Mathematics 2023-08-17 Florian Naef , Pavel Safronov

Let X be a Gorenstein orbifold and let Y be a crepant resolution of X. We state a conjecture relating the genus-zero Gromov--Witten invariants of X to those of Y, which differs in general from the Crepant Resolution Conjectures of Ruan and…

Algebraic Geometry · Mathematics 2014-11-11 Tom Coates , Hiroshi Iritani , Hsian-Hua Tseng

We give new decomposition theorems for classes of graphs that can be transduced in first-order logic from classes of sparse graphs -- more precisely, from classes of bounded expansion and from nowhere dense classes. In both cases, the…

Logic in Computer Science · Computer Science 2022-01-27 Jan Dreier , Jakub Gajarský , Sandra Kiefer , Michał Pilipczuk , Szymon Toruńczyk

We study invariants of virtual graphoids, which are virtual spatial graph diagrams with two distinguished degree-one vertices modulo graph Reidemeister moves applied away from the distinguished vertices. Generalizing previously known…

Combinatorics · Mathematics 2022-09-20 Neslihan Gügümcü , Louis H. Kauffman , Puttipong Pongtanapaisan

The purpose of this short paper is to further develop the theory of transverse generalized complex structures. We focus on proving some equivalent conditions to the basic $dd^{\mathcal{J}}$ -lemma. We justify our approach by describing the…

Differential Geometry · Mathematics 2017-01-09 Pawel Razny

We give a simple proof of Kolmogorov's theorem on the persistence of a quasiperiodic invariant torus in Hamiltonian systems. The theorem is first reduced to a well-posed inversion problem (Herman's normal form) by switching the frequency…

Dynamical Systems · Mathematics 2010-07-26 Jacques Féjoz

We classify tuples of (not necessarily commuting) isometries that admit von Neumann-Wold decomposition. We introduce the notion of twisted isometries for tuples of isometries and prove the existence of orthogonal decomposition for such…

Functional Analysis · Mathematics 2022-09-29 Narayan Rakshit , Jaydeb Sarkar , Mansi Suryawanshi

We collect geometric properties of the all-genus real Gromov-Witten theory and provide updates on its development since its introduction in 2015. We bring attention to a modification of the original construction of this theory which is…

Symplectic Geometry · Mathematics 2023-11-21 Penka Georgieva , Aleksey Zinger

Theories of gravity invariant under those diffeomorphisms generated by transverse vectors, $\pd_\m\xi^\m=0$ are considered. Such theories are dubbed transverse, and differ from General Relativity in that the determinant of the metric, $g$,…

High Energy Physics - Theory · Physics 2010-12-17 Enrique Álvarez , Antón F. Faedo , J. J. López-Villarejo

We make some remarks on deformations over non-commutative base. We describe the base algebra of versal deformations using $T^1$ and $T^2$.

Algebraic Geometry · Mathematics 2024-02-06 Yujiro Kawamata

We give several versions of local and global inverse mapping theorem for tame non necessarily smooth, mappings. Here tame mapping means a mapping which is subanalytic or, more generally, definable in some o-minimal structure. Our sufficient…

Geometric Topology · Mathematics 2007-12-18 Toshizumi Fukui , Krzysztof Kurdyka , Laurentiu Paunescu

We develop a theory of umkehr maps for twisted generalized homology theories. In this theory, interesting umkehr maps, including generalizations of important classical ones, are induced by cartesian morphisms of a certain category opfibred…

Algebraic Topology · Mathematics 2026-03-30 Anssi Lahtinen

We give a simple proof of the smooth Thom isomorphism for complex bundles for the bivariant K-theories on locally convex algebras considered by Cuntz. We also prove the Thom isomorphism in Kasparov's KK-theory in a form stated without proof…

K-Theory and Homology · Mathematics 2011-04-01 Martin Grensing
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