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Desuspension Theorem for the steam $\Pi_{2^l-2}$ in stable homotopy groups of spheres is formulated and is proved. The proof is a minor revision of a theorem in the preprint \cite{A1} by the author (2010).

Algebraic Topology · Mathematics 2024-04-17 Petr M. Akhmet'ev

In this paper we lay the foundations of an $\infty$-categorical theory of Stokes data.

Algebraic Geometry · Mathematics 2025-04-08 Mauro Porta , Jean-Baptiste Teyssier

In this paper, we introduce fundamental notions of homotopy theory, including homotopy excision and the Freudenthal suspension theorem. We then explore framed cobordism and its connection to stable homotopy groups of spheres through the…

Algebraic Topology · Mathematics 2025-03-17 Trishan Mondal

We describe a category, the objects of which may be viewed as models for homotopy theories. We show that for such models, ``functors between two homotopy theories form a homotopy theory'', or more precisely that the category of such models…

Algebraic Topology · Mathematics 2008-12-05 Charles Rezk

We prove a comparison isomorphism between the De Rham rational homotopy type of a smooth proper log variety defined over a p-adic field and the crystalline rational homotopy type of a semi-stable reduction mod p.

Number Theory · Mathematics 2007-05-23 Minhyong Kim , Richard M. Hain

In this paper we study the homotopy theory of parameterized spectrum objects in the $\infty$-category of $(\infty, 2)$-categories, as well as the Quillen cohomology of an $(\infty, 2)$-category with coefficients in such a parameterized…

Algebraic Topology · Mathematics 2018-02-23 Yonatan Harpaz , Joost Nuiten , Matan Prasma

We show that the monoidal product on the stable homotopy category of spectra is essentially unique. This strengthens work of this author with Schwede on the uniqueness of models of the stable homotopy theory of spectra. As an application we…

Algebraic Topology · Mathematics 2007-05-23 Brooke Shipley

The full description of the stable factor-representations of the infinite hyperoctahedral group up to quasi-equivalence obtained.

Representation Theory · Mathematics 2024-03-12 N. I. Nessonov

We show that if the canonical left semi-model structure on the category of Grothendieck $n$-groupoids exists, then it satisfies the homotopy hypothesis, i.e. the associated $(\infty,1)$-category is equivalent to that of homotopy $n$-types,…

Category Theory · Mathematics 2019-05-15 Simon Henry , Edoardo Lanari

We consider stable manifolds of a holomorphic diffeomorphism of a complex manifold. Using a conjugation of the dynamics to a (non-stationary) polynomial normal form, we show that typical stable manifolds are biholomorphic to complex…

Complex Variables · Mathematics 2009-11-07 Mattias Jonsson , Dror Varolin

In this paper the structural stability of generic families of vector fields of the PC-HC class on the two-dimensional sphere $S^2$ is proved. A classification of these families up to moderate equivalence in neighborhoods of their large…

Dynamical Systems · Mathematics 2026-05-14 Alexey Dorovskiy

We introduce a space of stable meromorphic differentials with poles of prescribed orders and define its tautological cohomology ring. This space, just as the space of holomorphic differentials, is stratified according to the set of…

Algebraic Geometry · Mathematics 2019-06-05 Adrien Sauvaget

In this paper, we prove a criterion of elementary equivalence of stable linear groups over fields of characteristic two.

Group Theory · Mathematics 2023-01-16 Elena Bunina , Alexander Mikhalev , Igor Soloviev

(This is an updated version; following an idea of Voevodsky, we have strengthened our results so all of them apply to one form of motivic homotopy theory). We give two general constructions for the passage from unstable to stable homotopy…

Algebraic Topology · Mathematics 2007-05-23 Mark Hovey

We show that discrete and classical homotopy theories are equivalent after localizing at n-equivalences for any non-negative integer n. By constructing an explicit homotopy inverse to the graph nerve functor associating an n-fibrant cubical…

Algebraic Topology · Mathematics 2026-02-24 Daniel Carranza , Chris Kapulkin

Secondary homotopy groups supplement the structure of classical homotopy groups. They yield a track functor on the track category of pointed spaces compatible with fiber sequences, suspensions and loop spaces. They also yield algebraic…

Algebraic Topology · Mathematics 2008-09-28 Hans-Joachim Baues , Fernando Muro

We establish a large class of homotopy coherent Morita-equivalences of Dold-Kan type relating diagrams with values in any weakly idempotent complete additive $\infty$-category; the guiding example is an $\infty$-categorical Dold-Kan…

Representation Theory · Mathematics 2022-03-18 Tashi Walde

We develop a comprehensive theory of the stable representation categories of several sequences of groups, including the classical and symmetric groups, and their relation to the unstable categories. An important component of this theory is…

Representation Theory · Mathematics 2015-06-17 Steven V Sam , Andrew Snowden

Evidence is given for the correctness of the Joyal-Riehl-Verity construction of the homotopy bicategory of the $(\infty, 2)$-category of $(\infty, 1)$-categories; in particular, it is shown that the analogous construction using complete…

Category Theory · Mathematics 2013-11-05 Zhen Lin Low

In this note we prove Yosida duality --- that is: the category of compact Hausdorff spaces with continuous maps is dually equivalent to the category of uniformly complete Archimedean Riesz spaces with distinguished units and unit-preserving…

Functional Analysis · Mathematics 2016-12-13 Bas Westerbaan