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We discuss how stability is related to the D-topology of mapping spaces, equipped with the functional diffeology. Indeed, we show that stable classes of mapping spaces are D-open. After a reformulation of the classical stability theorem of…

Differential Geometry · Mathematics 2023-05-30 Alireza Ahmadi

We prove Conjecture F from [VW12] which states that the complements of closures of certain strata of the symmetric power of a smooth irreducible complex variety exhibit rational homological stability. Moreover, we generalize this conjecture…

Algebraic Topology · Mathematics 2013-12-24 Alexander Kupers , Jeremy Miller

The recent proof by Madsen and Weiss of Mumford's conjecture on the stable cohomology of moduli spaces of Riemann surfaces, was a dramatic example of an important stability theorem about the topology of moduli spaces. In this article we…

Algebraic Topology · Mathematics 2009-09-30 Ralph L. Cohen

We prove a sharp representation stability result for graph complexes with a distinguished vertex, and prove that the chains realizing this sharp bound pass to non-trivial families of graph homology classes. This result may be interpreted as…

Algebraic Topology · Mathematics 2025-06-25 Enoch Fedah , Benjamin C. Ward

In this paper, we deal with stable homology computations with twisted coefficients for mapping class groups of surfaces and of 3-manifolds, automorphism groups of free groups with boundaries and automorphism groups of certain right-angled…

Algebraic Topology · Mathematics 2021-08-18 Arthur Soulié

We provide a version of Quillen's homological stability criterion for continuous bounded cohomology. This criterion is exploited in the companion paper (arXiv:2201.03879) in order to derive new bounded cohomological stability results for…

Group Theory · Mathematics 2025-08-20 Carlos De la Cruz Mengual , Tobias Hartnick

This is an exposition of a proof of the Madsen-Weiss Theorem, which asserts that the homology of mapping class groups of surfaces, in a stable dimension range, is isomorphic to the homology of a certain infinite loopspace that arises…

Geometric Topology · Mathematics 2014-02-11 Allen Hatcher

We introduce the idea of *representation stability* (and several variations) for a sequence of representations V_n of groups G_n. A central application of the new viewpoint we introduce here is the importation of representation theory into…

Representation Theory · Mathematics 2014-02-04 Thomas Church , Benson Farb

We propose a way to organise the subject of ``higher-order homological stability'', in the context of a graded $E_2$-algebra $\mathbf{R}$, along the same lines that the chromatic perspective organises stable homotopy theory. From this point…

Algebraic Topology · Mathematics 2026-03-04 Oscar Randal-Williams

We prove a representation stability result for the second homology groups of Torelli subgroups of mapping class groups and automorphism groups of free groups. This strengthens the results of Boldsen-Hauge Dollerup and Day-Putman. We also…

Algebraic Topology · Mathematics 2020-09-28 Jeremy Miller , Peter Patzt , Jennifer C. H. Wilson

We show rational homological stability for the homotopy automorphisms and block diffeomorphims of iterated connected sums of products of spheres. The spheres can have different dimension, but need to satisfy a certain connectivity…

Algebraic Topology · Mathematics 2019-12-25 Matthias Grey

Following the argument for diffeomorphisms by Galatius and Randal-Williams, we prove that homeomorphisms of 1-connected manifolds of even dimension at least 6 exhibit homological stability. We deduce similar results for PL homeomorphisms…

Algebraic Topology · Mathematics 2016-08-23 Alexander Kupers

In this survey paper, we give a complete list of known results on the first and the second homology groups of surface mapping class groups. Some known results on higher (co)homology are also mentioned.

Geometric Topology · Mathematics 2007-05-23 Mustafa Korkmaz

This replacement corrects statement and proof of the main result. Also, a section on the universal Abel-Jacobi map has been added.

alg-geom · Mathematics 2008-02-03 Eduard Looijenga

By proving that several new complexes of embedded disks are highly connected, we obtain several new homological stability results. Our main result is homological stability for topological chiral homology on an open manifold with…

Algebraic Topology · Mathematics 2016-02-08 Alexander Kupers , Jeremy Miller

It is, by now, classical that lattices in higher rank semisimple groups have various rigidity properties. In this work, we add another such rigidity property to the list: uniform stability with respect to the family of unitary operators on…

Group Theory · Mathematics 2023-07-11 Lev Glebsky , Alexander Lubotzky , Nicolas Monod , Bharatram Rangarajan

In the present note we describe geometrically the homology classes in the total space of a surface bundle over a surface in terms of the holonomy map. We treat the cases where the base surface is closed or has one boundary component. We…

Geometric Topology · Mathematics 2016-05-12 Caterina Campagnolo

We describe partial semi-simplicial resolutions of moduli spaces of surfaces with tangential structure. This allows us to prove a homological stability theorem for these moduli spaces, which often improves the known stability ranges and…

Algebraic Topology · Mathematics 2015-03-13 Oscar Randal-Williams

We present a method which provides a unified framework for most stability theorems that have been proved in graph and hypergraph theory. Our main result reduces stability for a large class of hypergraph problems to the simpler question of…

Combinatorics · Mathematics 2022-11-15 Xizhi Liu , Dhruv Mubayi , Christian Reiher

Using a recent description of the geometric stability manifold, we show the geometric stability manifold associated to any smooth projective complex surface is contractible. We then use this result to demonstrate infinitely many new…

Algebraic Geometry · Mathematics 2024-05-24 Nick Rekuski
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