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15
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Find a surface that has positive constant curvature that is not open subset of sphere

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#differential-geometry #manifolds #riemannian-geometry #smooth-manifolds
65
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Can the same surface have minimal genus in both a 3-manifold and a 4-manifold?

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#general-topology #manifolds #homology-cohomology #surfaces #foliations
74
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G-P Exercise, immersion except at origin, what does its image look like?

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#linear-algebra #general-topology #multivariable-calculus #differential-geometry #manifolds
131
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Grassmanians and boudaries of manifolds

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#manifolds #differential-topology #cobordism
381
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Meaning of conditions on definition of topological manifold

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#general-topology #manifolds
679
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Nonorientable manifolds being a boundaries

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#manifolds #differential-topology #smooth-manifolds #geometric-topology
561
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Codifferential and corresponding homology theory

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#differential-geometry #manifolds #homology-cohomology
210
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Explaining problem in Gadea's "Analysis and Algebra on Differentiable Manifolds"

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#differential-geometry #manifolds #smooth-manifolds
51
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What does it mean for a function f to be C^k "close" to a function g?

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#general-topology #manifolds
170
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The definition of C^r Structural Stability

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#general-topology #manifolds #dynamical-systems #smooth-manifolds
1.9k
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Tautological line bundle over $\mathbb{RP}^n$ isomorphic to normal bundle? Also "splitting" of transition functions

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#general-topology #differential-geometry #algebraic-topology #manifolds #differential-topology
135
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Pipe-fitting conditions in 3D

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#differential-geometry #manifolds
8k
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Are there compact manifolds without boundary?

Published on
#manifolds #compactness
166
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Why the set $g^{-1}(\{0\}) $ is not a differentiable manifold?

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#multivariable-calculus #manifolds
757
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Higher homology groups of infinite cyclic cover

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#algebraic-topology #manifolds #knot-theory

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