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Answers
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Magic trick based on deep mathematics
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Pascal Triangle and Prime Numbers
3
How to solve f(f(x)) = cos(x) ?
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Examples of non-metrizable spaces
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Integrability of derivatives
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Which topological spaces admit a nonstandard metric?
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What is an explicit example of a sequence converging to two different points?
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The free group $F_2$ has index 12 in SL(2,$\mathbb{Z}$)
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Convex hull in CAT(0)
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Spectral properties of Cayley graphs
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Oriention-Reversing Diffeomorphisms of a Manifold
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Lifting matrices mod 2 to integers.
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Applications of homotopy groups of spheres
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Topological description of Manifold with boundary
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Proving that a group is free
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circle action on sphere
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Question about exotic spheres
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Simple examples of equivariant homology and bordism
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Are there space filling curves for the Hilbert cube ?
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homotopy associative $H$-space and $coH$-space
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Canonical geometric examples
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General form of amount of triangles that can be formed in an MxN point lattice
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Topology of maps between fibers of vector bundles
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When is the realization of a simplicial space compact ?
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Finding saturated open sets
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Notion of finite dimensional simplicial space (2)
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max length or size of a convex set
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Finding lattice with short basis-vectors containing given lattice
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Collapsing objects in a category
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Partial orders arising from $l$-spaces
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