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15
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Quotient map and connected sets proof

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#general-topology #proof-verification
40
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Balls on boundary of a set

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#general-topology #metric-spaces
430
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Limit points of $(0, \ 1]$

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#general-topology
393
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Is there a homeomorphism between the closed left-half plane and the closed unit disk of $\mathbb C$

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#general-topology #complex-analysis
119
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Does a compact path-connected set always have a finite number of holes?

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#general-topology
109
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Direct definition of product or box topology?

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#general-topology #category-theory
198
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Is $C[a,b]$ dense in $C^1[a,b]$?

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#general-topology #functional-analysis
90
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Van Kampen-like property for unicoherence

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#general-topology #algebraic-topology
199
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Intuition behind the $cl(cl(A))=cl(A)$ Kuratowski closure axiom in general topology?

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#general-topology #intuition
85
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Definition of product topology/box topology in terms of the Kuratowski closure operator?

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#general-topology
72
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A discrete topological space cannot be given a $C^{\infty}$ structure

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#general-topology #differential-geometry #smooth-manifolds
43
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Showing a bounded operator is continuous wrt weak topologies

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#general-topology
86
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Is $U\cap C$ dense in $C$?

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#general-topology
190
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If $\text{Boundary}(A)\subseteq A.$, then $\overline A=A$?

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#general-topology #metric-spaces
29
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topological mapping ordered sets

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#general-topology

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