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Is Neighborhood an open set?

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#general-topology
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Relation between 2 different homology and cohomology pairings

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#general-topology #geometry #differential-geometry #algebraic-topology
96
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Continuity via sequences in general topology

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#general-topology #continuity
103
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Gluing (Principal) Bundles?

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#general-topology #differential-geometry #differential-topology
125
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Can a Homeomorphism exist between two discontinuous spaces.

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#general-topology #continuity
267
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Cover of a simply connected and lpc space is trivial

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#general-topology #covering-spaces
872
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Does connected components of a group scheme form a group scheme?

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#general-topology #algebraic-geometry #algebraic-groups
77
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Is this seminormed space (intersection of Banach spaces) non-empty?

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#general-topology #functional-analysis #analysis
178
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Induced neighbourhoods in uniform space

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#general-topology #uniform-spaces
71
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Let S be an uncountable subset of a separable metric space (X,d). Then,can we find any such S in X which contains no dense subset D, dense in itself?

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#general-topology #metric-spaces
409
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Deformation Retraction and Projection/Closest Vector

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#linear-algebra #general-topology #algebraic-topology #projection #retraction
583
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About a $C^\infty$ extension of a function defined on a closed set (or a $C^\infty$- version of Tietze's extension theorem)

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#real-analysis #general-topology
234
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Example of product topology where the index set is uncountable

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#general-topology #definition #product-space
640
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homology group of complement of two linked and unlinked circles

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#general-topology #algebraic-topology
85
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Path components of $\mathbb{Z}/2\mathbb{Z}$-actions on a manifold

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#general-topology #differential-geometry #manifolds #differential-topology #geometric-topology

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