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Kirby calculus on E8 plumbing

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#geometric-topology #surgery-theory #kirby-diagram
184
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How to characterize the group of homeomorphisms of unit disk in terms of the group of homeomorphisms of plane?

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#real-analysis #general-topology #group-theory #geometric-topology #geometric-group-theory
70
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Example of a homeomorphism of a plane which fixes unit circle point wise

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#real-analysis #general-topology #geometric-topology #geometric-group-theory
166
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How to undo a type I Reidemeister move only using type II and type III moves?

Published on
#geometric-topology #knot-theory
138
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A question on orientation in manifolds (with or without boundary)

Published on
#geometric-topology
405
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What is the maximum number of spheres with same radius that can touch each other in n dimensions.

Published on
#geometry #geometric-topology
172
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Self-Homeomorphism of an orientable surface with boundary

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#geometric-topology
147
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Can a simple closed curve in a compact surface be dense?

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#general-topology #geometric-topology
237
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Number of minima in a ribbon disk?

Published on
#geometric-topology #knot-theory #knot-invariants
83
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Reduced homology group $H_k(S^4 - N^4, \mathbb Z)=H^{4-k}(S^4 - N^4,\mathbb Z)=H_{k-1}(N^4, \mathbb Z)=\mathbb Z^2$?

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#general-topology #algebraic-topology #homology-cohomology #geometric-topology #surgery-theory
68
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What shapes do these quotients represent? Do they have a name?

Published on
#geometry #geometric-topology
187
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Extended mapping class group of $S^p \times S^q$

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#general-topology #geometric-topology #mapping-class-group
715
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Obtaining the three torus via Dehn surgery

Published on
#differential-topology #geometric-topology #low-dimensional-topology #surgery-theory
181
Views

Killing cohomology of surfaces in finite covers

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#algebraic-topology #surfaces #geometric-topology
243
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Isotopy between homeomorphisms of open balls

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#general-topology #algebraic-topology #geometric-topology

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