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Mikhail Ostrovskii's user avatar
Mikhail Ostrovskii's user avatar
Mikhail Ostrovskii's user avatar
Mikhail Ostrovskii
  • Member for 11 years, 4 months
  • Last seen more than 1 year ago
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I think that MathOverflow is a very interesting and useful web site. I try to answer those questions which I can answer without devoting to this significant time. Exceptions are given to those questions which I consider as interesting research problems.

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question
32
Isometric embeddings of finite subsets of $\ell_2$ into infinite-dimensional Banach spaces
Oct 18, 2015
question
31
Do there exist infinite-dimensional Banach spaces in which every bounded linear operator attains its norm?
Feb 27, 2016
answer
23
Who proved that $l^1$ and $L^1[0,1]$ are not isomorphic?
May 4, 2016
question
17
Large almost equilateral sets in finite-dimensional Banach spaces
Nov 26, 2014
question
16
Generalizing the Mazur-Ulam theorem to convex sets with empty interior in Banach spaces
Dec 8, 2015
question
12
Is $\ell_p$ $(1<p<\infty)$ finitely isometrically distortable?
Dec 27, 2015
question
11
The number of relevant scales for a finite metric space
Jul 27, 2013
question
11
Embeddings of finitely generated groups into uniformly convex Banach spaces
Aug 19, 2014
answer
11
If a subspace $F$ is contained in a subspace $G$, and $H$ is close to $G$, can we choose a subspace of $H$ close to $F$?
Dec 17, 2020
answer
11
Complemented subspaces constructed from finite pieces- part II
Dec 25, 2018