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15
137
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Is the type of a knot dependent on the space in which it is embedded or not?

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#general-topology #algebraic-topology #geometric-topology #knot-theory #low-dimensional-topology
151
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Action of a degree $m$ map on $\pi_{n+1}S^n$

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#algebraic-topology #differential-topology #homotopy-theory #geometric-topology
273
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Does there always exist a continuous/smooth map from $\mathbb{R}^n$ onto a manifold $M^n$?

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#differential-topology #geometric-topology
32
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Convexity of non-compact, ball-connected sets

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#general-topology #manifolds #geometric-topology #convex-geometry
242
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constructing pushout

Published on
#general-topology #geometric-topology
285
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General Form of Pick's Theorem

Published on
#geometry #geometric-topology #polygons
35
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Does $A\simeq_\varphi B$ imply $A/{\sim}\,\, \simeq B/\varphi(\sim)$?

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#general-topology #algebraic-topology #geometric-topology
359
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How to tell if a homomorphism from a surface group to itself is surjective/injective/inner

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#group-theory #surfaces #geometric-topology #combinatorial-group-theory
481
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Do oriented null cobordant manifolds admit spin structures?

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#differential-geometry #algebraic-topology #differential-topology #geometric-topology #spin-geometry
275
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Intersections of a circle and segment and intersection of two circles in Euclid's first book

Published on
#euclidean-geometry #math-history #geometric-topology
152
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Explicit homotopy equivalence between pairs

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#general-topology #geometry #algebraic-topology #geometric-topology
64
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2-torsion in $\pi_1$ of codimension 0 submanifolds of a 3-manifold

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#algebraic-topology #differential-topology #geometric-topology
174
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Parallel planes of minimal surface

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#riemannian-geometry #topological-groups #geometric-topology #minimal-surfaces #topological-graph-theory
68
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A generating set for $H_2(M^3; \mathbb{Z})$ of disjoint embedded surfaces?

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#algebraic-topology #differential-topology #geometric-topology
543
Views

How to Show that an $n$-finned Hyperplane is not Homeomorphic to $\mathbb{R}^m$

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#general-topology #algebraic-topology #euclidean-geometry #geometric-topology #continuum-theory

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