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15
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$f$ - odd implies $d(f)$ - odd, question to the proof

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#general-topology #algebraic-topology #homology-cohomology #homology-sphere
65
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Banach–Tarski n sphere

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#homology-sphere
699
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Intuition for local degree formula for singular homology map between n-spheres

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#algebraic-topology #homology-cohomology #homology-sphere
1.4k
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Fundamental group of the Poincaré Homology Sphere

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#general-topology #group-theory #algebraic-topology #homology-sphere
246
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"True angle" between unit vector on sphere

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#trigonometry #homology-sphere
1.1k
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Simply-connected $\mathbb{Z}_p$-homology spheres?

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#algebraic-topology #homology-cohomology #homology-sphere
541
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The $n$-dimensional cube modulus its boundary is homeomorphic to an $n$-dimensional sphere

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#algebraic-topology #homotopy-theory #spheres #higher-homotopy-groups #homology-sphere
116
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Does Alexander duality hold for compact, orientable Homology sphere?

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#algebraic-topology #manifolds #homology-cohomology #triangulation #homology-sphere
243
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Visualizing the Poincare homology sphere

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#algebraic-topology #homology-cohomology #homotopy-theory #visualization #homology-sphere
41
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Writing an integral over a sphere in terms of integrals of another spheres with lower dimension

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#measure-theory #lebesgue-measure #spheres #geometric-measure-theory #homology-sphere
182
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The $+$-construction on a homology $n$-sphere

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#algebraic-topology #fundamental-groups #homology-sphere
562
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Using Poincaré duality to show a closed manifold is a homology sphere

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#algebraic-topology #manifolds #homology-cohomology #homology-sphere
134
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Why are invariants of Homology 3-Spheres interesting?

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#algebraic-topology #homology-cohomology #geometric-invariant #homology-sphere
888
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If $M$ is a rational homology sphere, is there a map $S^n \to M$ of non-zero degree?

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#differential-topology #homology-sphere
576
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Is the universal cover of an integral homology sphere again an integral homology sphere?

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#algebraic-topology #covering-spaces #homology-sphere

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