William

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Eversion of the 6-sphere in 7-space

gt.geometric-topology at.algebraic-topology dg.differential-geometry

dec 2 at 1:07 Igor Rivin 31.1k●3●37●71

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273

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Higher dimensional Heegaard splittings?

at.algebraic-topology dg.differential-geometry gt.geometric-topology gn.general-topology

nov 16 11 at 19:43 Daniel Moskovich 11k●1●36●105

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594

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When is a finite cw-complex a compact topological manifold?

gn.general-topology cw-complexes manifolds gt.geometric-topology at.algebraic-topology

feb 18 12 at 20:09 Greg Friedman 2,074●4●14

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222

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Characteristic Classes of a Fibered Sum

gt.geometric-topology at.algebraic-topology gn.general-topology differential-topology

feb 8 12 at 14:33 Paul 2,814●1●7●14

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220

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Smooth manifold with non-trivial inertia group? (wrt homotopy spheres)

homotopy-theory gt.geometric-topology at.algebraic-topology

nov 4 11 at 1:47 William 394●2●9

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291

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When is a Topological pushout also a Smooth pushout?

gn.general-topology differential-topology ct.category-theory reference-request

feb 24 12 at 14:39 Ronnie Brown 5,217●17●20

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137

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Who defined the Inertia Group $I(M^n)\subset\Theta_n$ of a smooth manifold?

reference-request differential-topology soft-question

feb 25 12 at 22:10 William 394●2●9

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164

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The inertia subgroup of `$\Theta_n$` for Lie groups

at.algebraic-topology dg.differential-geometry gt.geometric-topology

dec 29 11 at 20:40 Vitali Kapovitch 4,082●1●11●22

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347

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Treating the Connected Sum (and other constructions) as a Push-out

reference-request differential-topology ct.category-theory

mar 6 12 at 17:01 William 394●2●9

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What are some examples of ingenious, unexpected constructions?

Connected sum of surfaces

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Questions

Eversion of the 6-sphere in 7-space

Higher dimensional Heegaard splittings?

When is a finite cw-complex a compact topological manifold?

Characteristic Classes of a Fibered Sum

Smooth manifold with non-trivial inertia group? (wrt homotopy spheres)

When is a Topological pushout also a Smooth pushout?

Who defined the Inertia Group $I(M^n)\subset\Theta_n$ of a smooth manifold?

The inertia subgroup of `$\Theta_n$` for Lie groups

Treating the Connected Sum (and other constructions) as a Push-out

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