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Steven Frankel's user avatar
Steven Frankel's user avatar
Steven Frankel
  • Member for 15 years, 1 month
  • Last seen more than 5 years ago
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Hyperbolic 3-manifold groups acting on the plane
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Hyperbolic 3-manifold groups acting on the plane
@YCor: By homeomorphisms. For cocompactness, let's just say every point can be taken into some fixed compact set.
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Hyperbolic 3-manifold groups acting on the plane
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Hyperbolic 3-manifold groups acting on the plane
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Hyperbolic 3-manifold groups acting on the plane
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Pair of curves joining opposite corners of a square must intersect---proof?
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What (if anything) happened to Intersection Homology?
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Visualizing how Cech cohomology detects holes