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A rigidity property for the homotopy invariant stable linear framed presheaves is established. As a consequence a variant of Gabber rigidity theorem is obtained for a cohomology theory representable in the motivic stable homotopy category…

K-Theory and Homology · Mathematics 2018-04-04 Alexey Ananyevskiy , Andrei Druzhinin

Our main result has topological, combinatorial and computational flavor. It is motivated by a fundamental conjecture stating that computing Khovanov homology of a closed braid of fixed number of strands has polynomial time complexity. We…

Geometric Topology · Mathematics 2023-05-31 Jozef H. Przytycki , Marithania Silvero

We introduce notions of {\it upper chernrank} and {\it even cup length} of a finite connected CW-complex and prove that {\it upper chernrank} is a homotopy invariant. It turns out that determination of {\it upper chernrank} of a space $X$…

Algebraic Topology · Mathematics 2018-01-24 Bikram Banerjee

We give a direct proof that middle mapping spaces in coherent nerves of Kan enriched categories have the same homotopy type as the original mapping spaces.

Algebraic Topology · Mathematics 2020-11-19 Fabian Hebestreit , Achim Krause

The focus of this paper is the comparison of two unstable homotopy spectral sequences-- the unstable mod p Adams spectral sequence that computes the unstable homotopy of a p-complete space, and the Goerss--Hopkins spectral sequence, which…

Algebraic Topology · Mathematics 2009-12-13 Jennifer French

In the paper we prove that the primitive part of the Sinha homology spectral sequence E^2-term for the space of long knots is rationally isomorphic to the homotopy E^2-term. We also define natural graph-complexes computing the rational…

Algebraic Topology · Mathematics 2016-09-07 Pascal Lambrechts , Victor Tourtchine

In this paper, we show that the homomorphisms between two unital one-dimensional NCCW complexes with the same KK-class are stably homotopic, i.e., with adding on a common homomorphism (with finite dimensional image), they are homotopic. As…

Operator Algebras · Mathematics 2019-09-18 Qingnan An , George A. Elliott , Zhichao Liu , Yuanhang Zhang

We develop a space-level refinement of the $2$-factor homology by constructing a stable homotopy type associated to a certain family $\mathscr{G}$ of planar trivalent graphs equipped with perfect matchings. Specifically, we define a cover…

Geometric Topology · Mathematics 2025-08-19 Nilangshu Bhattacharyya

We construct a spectral sequence associated to a stratified space, which computes the compactly supported cohomology groups of an open stratum in terms of the compactly supported cohomology groups of closed strata and the reduced cohomology…

Algebraic Topology · Mathematics 2017-06-14 Dan Petersen

In this paper, I computed the second variation formula of the generalized Einstein-Hilbert functional and prove that a Bismut-flat, Einstein manifold is linearly stable under some curvature assumption. In the last part of the paper, I prove…

Differential Geometry · Mathematics 2026-01-13 Kuan-Hui Lee

Recently, Benzoni--Gavage, Danchin, Descombes, and Jamet have given a sufficient condition for linear and nonlinear stability of solitary wave solutions of Korteweg's model for phase-transitional isentropic gas dynamics in terms of…

Analysis of PDEs · Mathematics 2007-05-23 K. Zumbrun

This article shows several new methods for proofs on Kan complexes while using them to give a compact introduction to the homotopy groups of these complexes. Then more advanced objects are studied starting with homology and the Hurewicz…

Algebraic Topology · Mathematics 2016-08-02 Jan Steinebrunner

We give a new proof of an unpublished result of Dale Peterson, proved by Lam and Shimozono, which identifies explicitly the structure constants, with respect to the quantum Schubert basis, for the $T$-equivariant quantum cohomology…

Algebraic Geometry · Mathematics 2025-04-10 Chi Hong Chow

We study higher chromatic height analogues $eo_h$ of the connective real $K$-theory spectrum $ko$. We show that $eo_h$ is an fp spectrum of type $h$ in the sense of Mahowald--Rezk. We use these to study an Euler characteristic for fp…

K-Theory and Homology · Mathematics 2025-07-10 Christian Carrick , Michael A. Hill

We give applications of equivariant Gromov--Hausdorff convergence in various contexts. Namely, using equivariant Gromov--Hausdorff convergence, we prove a stability result in the setting of compact finite dimensional Alexandrov spaces.…

Metric Geometry · Mathematics 2024-05-21 Mohammad Alattar

In this paper we show that both the homotopy category of strict $n$-categories, $1\leqslant n \leqslant \infty$, and the homotopy category of Steiner's augmented directed complexes are equivalent to the category of homotopy types. In order…

Algebraic Topology · Mathematics 2018-02-16 Andrea Gagna

We prove a quantitative version of a sharp integral inequality by Hang, Wang, and Yan for both the Poisson operator and its adjoint. Our result has the strongest possible norm and the optimal stability exponent. This stability exponent is…

Analysis of PDEs · Mathematics 2025-08-14 Rupert L. Frank , Jonas W. Peteranderl , Larry Read

This expository article gives a thorough and well-motivated account of the proof of the nilpotence theorem by Devinatz-Hopkins-Smith.

Algebraic Topology · Mathematics 2021-08-24 David Popović

We show that H-spaces with finitely generated cohomology, as an algebra or as an algebra over the Steenrod algebra, have homotopy exponents at all primes. This provides a positive answer to a question of Stanley.

Algebraic Topology · Mathematics 2008-04-10 Wojciech Chacholski , Wolfgang Pitsch , Jerome Scherer , Don Stanley

The subject of this paper is the big quantum cohomology rings of symplectic isotropic Grassmannians $\text{IG}(2, 2n)$. We show that these rings are regular. In particular, by "generic smoothness", we obtain a conceptual proof of generic…

Algebraic Geometry · Mathematics 2017-05-05 John Alexander Cruz Morales , Alexander Kuznetsov , Anton Mellit , Nicolas Perrin , Maxim Smirnov