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15
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Is "slightly deform" a well defined concept in mathematical proof?

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#terminology #geometric-topology #knot-theory
258
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Extenting a homeomorphism on subsurface to the entire surface

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#general-topology #algebraic-topology #differential-topology #geometric-topology #smooth-manifolds
654
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Proof of Jordan curve theorem

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#general-topology #algebraic-topology #geometric-topology
915
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How can I show that if a set is bounded, then it's contained in a k-cell?

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#real-analysis #general-topology #analysis #geometric-topology
176
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Existence of CAT(0)-metrics

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#differential-geometry #metric-spaces #geometric-topology #metric-geometry
412
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How to prove that $CP^4$ cannot be immersed in $R^{11}$

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#algebraic-geometry #algebraic-topology #geometric-topology
151
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Classification of Triangulated Surface

Published on
#general-topology #surfaces #geometric-topology #triangulation
173
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Alexander Method for non-orientable Surface

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#algebraic-topology #differential-topology #geometric-topology
144
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Are there "interesting" examples of complete finite-volume non-compact Riemannian manifolds that are not non-positively curved?

Published on
#reference-request #lie-groups #riemannian-geometry #geometric-topology
2.1k
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Is every self-homeomorphism homotopic to a diffeomorphism?

Published on
#manifolds #differential-topology #geometric-topology
2k
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The notion of a right-angled hexagon in hyperbolic geometry

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#hyperbolic-geometry #geometric-topology #low-dimensional-topology
125
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Geometric Intuition for "Right-Veering" Property of $f$ in MCG(S)?

Published on
#differential-geometry #differential-topology #geometric-topology
149
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Check the relation between the topology

Published on
#general-topology #geometric-topology
89
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Is "small disk" well-defined?

Published on
#manifolds #definition #geometric-topology
229
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Does a closed surface in the 3-sphere bound a handlebody?

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#geometric-topology #low-dimensional-topology

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