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15
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Why does $X_0\times S^1\simeq X-X_0$?

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#geometry #differential-geometry #riemannian-geometry #differential-topology #geometric-topology
128
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A question about degree of map on a smooth manifold

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#differential-geometry #riemannian-geometry #differential-topology #geometric-topology
242
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Two definitions of Lens Spaces

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#differential-topology #smooth-manifolds #geometric-topology #manifolds-with-boundary
171
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Is Seifert-Weber space homogeneous for a Lie group?

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#manifolds #lie-groups #geometric-topology #homogeneous-spaces
551
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Is it possible to realize the Klein bottle as a linear group orbit?

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#representation-theory #lie-groups #geometric-topology #algebraic-groups #homogeneous-spaces
227
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Bianchi classification of solvable Lie groups and cocompact subgroups

Published on
#lie-groups #geometric-topology #homogeneous-spaces
97
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Explicit calculus of Hilbert-Smith conjecture

Published on
#group-actions #geometric-topology #low-dimensional-topology
94
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Which Euclidean 3 manifolds are coset spaces $ G/H $?

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#euclidean-geometry #lie-groups #3d #geometric-topology #homogeneous-spaces
20
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Gluing 2 Seifert manifolds along toric boundary does not yield Seifert manifold and JSJ decomposition

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#differential-topology #smooth-manifolds #group-actions #geometric-topology
155
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Which 3 manifolds admit transitive action by compact group?

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#riemannian-geometry #lie-groups #smooth-manifolds #geometric-topology #homogeneous-spaces
59
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Finding(drawing) interior, boundary and closure of a given 2D visual representation of a topological space.

Published on
#general-topology #geometric-topology
205
Views

Is the fundamental group of non orientable surface Fuchsian?

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#group-theory #algebraic-topology #riemann-surfaces #geometric-topology #non-orientable-surfaces
57
Views

What is the determinant line bundle over the solid Klein bottle?

Published on
#differential-topology #geometric-topology
428
Views

$ S^2 \times R $ geometry

Published on
#lie-groups #smooth-manifolds #3d #geometric-topology #homogeneous-spaces
225
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Torus is the only closed orientable surface regularly covered by punctured plane

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#group-theory #algebraic-topology #geometric-topology #covering-spaces #free-groups

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