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Characterization of compact spaces

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#general-topology #solution-verification #compactness
114
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What does this notation means? (proof of Picard–Lindelöf theorem in wikipedia)

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#general-topology #ordinary-differential-equations #notation
34
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The space to valuation systems of Lukasiewicz logic is a dense set?

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#general-topology
870
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Uncountable Set with Co-countable topology is not a Sequential Space

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#general-topology #proof-verification #convergence-divergence
58
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Can we deduce that there exist a compact set $A$ such that $f(A)⊂A$

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#real-analysis #general-topology
125
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Has this topology been studied?

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#general-topology #reference-request
84
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Is a subset of $\ell^\infty$ metrizable?

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#general-topology #functional-analysis #analysis
54
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In zero-dimensional Hausdorff Lindelof space each open cover has an open disjoint refinement

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#general-topology
74
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$L(V,\mathbb{R})$ with $\|\cdot\|_1$ complete?

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#general-topology #functional-analysis #lp-spaces
50
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Why it is needed to show $X$ is a subspace of $Y$ in the one point compactification theorem?

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#general-topology #compactness
34
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$(f,g) = C(X) \Longleftrightarrow Z(f) \cap Z(g) = \emptyset$

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#general-topology #filters
136
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Set-theoretic difficulties concerning normality

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#general-topology #logic
660
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Every perfect set has cardinality $2^{\aleph_0}$?

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#general-topology #descriptive-set-theory
41
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Equivalence of definitions of a closed set

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#general-topology
609
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Sequential compactness $\rightarrow$ limit point compactness and axiom of choice

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#general-topology #compactness #axiom-of-choice

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