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Mathematics
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jenda358
  • Member for 5 years
  • Last seen more than a month ago
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5
Does the family of compact subsets of a Polish space belong to the Effros Borel structure?
Feb 11, 2021
3
Finer Polish topology which turns countably many given Borel sets to clopen sets
Jan 30, 2021
3
Irrationality of an "Euler-like" number
Feb 11, 2021
3
A Hausdorff compact space $X$ containing an uncountable discrete set $A$ such that $\overline{U}=\overline{U \setminus A}$ for every open set $U$
Oct 23, 2022
3
Newton's method - does it always work for functions that are close to the identity function?
Jan 7
2
Finding a continuous function between upper and lower semi-continuous ones
Jul 6, 2020
2
Hemicontinuous compact-valued mapping on $\mathbb{R}$ with no continous selection
Jul 22, 2020
2
Polish group actions: if an orbit is non-meager in itself, it is a Baire space?
Jan 19, 2021
2
Effros Borel structure
Feb 10, 2021
2
Given metric spaces $X$ and $Y$, does there exist a metric space containing isometric copies of both $X$ and $Y$?
Feb 14, 2021