Stabilization for the automorphisms of free groups with boundaries

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Stabilization for the automorphisms of free groups with boundaries. / Hatcher, Allen; Wahl, Nathalie.

In: Geometry & Topology, Vol. 9, 2005, p. 1295-1336.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Hatcher, A & Wahl, N 2005, 'Stabilization for the automorphisms of free groups with boundaries', Geometry & Topology, vol. 9, pp. 1295-1336.

APA

Hatcher, A., & Wahl, N. (2005). Stabilization for the automorphisms of free groups with boundaries. Geometry & Topology, 9, 1295-1336.

Vancouver

Hatcher A, Wahl N. Stabilization for the automorphisms of free groups with boundaries. Geometry & Topology. 2005;9:1295-1336.

Author

Hatcher, Allen ; Wahl, Nathalie. / Stabilization for the automorphisms of free groups with boundaries. In: Geometry & Topology. 2005 ; Vol. 9. pp. 1295-1336.

Bibtex

@article{a635bd60d6b411dd9473000ea68e967b,
title = "Stabilization for the automorphisms of free groups with boundaries",
abstract = "The homology groups of the automorphism group of a free group are known to stabilize as the number of generators of the free group goes to infinity, and this paper relativizes this result to a family of groups that can be defined in terms of homotopy equivalences of a graph fixing a subgraph. This is needed for the second author's recent work on the relationship between the infinite loop structures on the classifying spaces of mapping class groups of surfaces and automorphism groups of free groups, after stabilization and plus-construction. We show more generally that the homology groups of mapping class groups of most compact orientable 3-manifolds, modulo twists along 2-spheres, stabilize under iterated connected sum with the product of a circle and a 2-sphere, and the stable groups are invariant under connected sum with a solid torus or a ball. These results are proved using complexes of disks and spheres in reducible 3-manifolds.",
author = "Allen Hatcher and Nathalie Wahl",
note = "Keywords: math.GT; math.AT; 20F28, 57M07",
year = "2005",
language = "English",
volume = "9",
pages = "1295--1336",
journal = "Geometry & Topology",
issn = "1465-3060",
publisher = "Geometry & Topology Publications",

}

RIS

TY - JOUR

T1 - Stabilization for the automorphisms of free groups with boundaries

AU - Hatcher, Allen

AU - Wahl, Nathalie

N1 - Keywords: math.GT; math.AT; 20F28, 57M07

PY - 2005

Y1 - 2005

N2 - The homology groups of the automorphism group of a free group are known to stabilize as the number of generators of the free group goes to infinity, and this paper relativizes this result to a family of groups that can be defined in terms of homotopy equivalences of a graph fixing a subgraph. This is needed for the second author's recent work on the relationship between the infinite loop structures on the classifying spaces of mapping class groups of surfaces and automorphism groups of free groups, after stabilization and plus-construction. We show more generally that the homology groups of mapping class groups of most compact orientable 3-manifolds, modulo twists along 2-spheres, stabilize under iterated connected sum with the product of a circle and a 2-sphere, and the stable groups are invariant under connected sum with a solid torus or a ball. These results are proved using complexes of disks and spheres in reducible 3-manifolds.

AB - The homology groups of the automorphism group of a free group are known to stabilize as the number of generators of the free group goes to infinity, and this paper relativizes this result to a family of groups that can be defined in terms of homotopy equivalences of a graph fixing a subgraph. This is needed for the second author's recent work on the relationship between the infinite loop structures on the classifying spaces of mapping class groups of surfaces and automorphism groups of free groups, after stabilization and plus-construction. We show more generally that the homology groups of mapping class groups of most compact orientable 3-manifolds, modulo twists along 2-spheres, stabilize under iterated connected sum with the product of a circle and a 2-sphere, and the stable groups are invariant under connected sum with a solid torus or a ball. These results are proved using complexes of disks and spheres in reducible 3-manifolds.

M3 - Journal article

VL - 9

SP - 1295

EP - 1336

JO - Geometry & Topology

JF - Geometry & Topology

SN - 1465-3060

ER -

ID: 9396661