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Ivan Feshchenko's user avatar
Ivan Feshchenko's user avatar
Ivan Feshchenko's user avatar
Ivan Feshchenko
  • Member for 9 years, 2 months
  • Last seen more than 1 year ago
  • Kyiv, Ukraine
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12
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11
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79
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5
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36
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21
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14
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Top posts
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All Questions Answers
Score Newest
question
27
Can a countable union of two-element sets be uncountable?
Feb 8, 2022
question
19
Can we take a supremum over all Hilbert spaces?
Nov 5, 2020
question
8
Continuous linear functionals and the Axiom of Choice
Oct 14, 2021
question
5
Extension of bounded linear operators
Mar 12, 2014
question
5
Inverse marginal property of a collection of $\sigma$-algebras
Apr 22, 2020
question
5
Completeness of the space $L^p$ and the Axiom of Countable Choice
Feb 3, 2022
question
3
Dissection of a polygon into convex polygons
Oct 3, 2014
question
2
When is the sum of complemented subspaces complemented?
May 2, 2016
question
2
Algebraic connectivity of the path $P_n$
Jul 19, 2019
question
2
Can we choose an element from a class?
Mar 24, 2021

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