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Ostap Chervak's user avatar
Ostap Chervak's user avatar
Ostap Chervak's user avatar
Ostap Chervak
  • Member for 13 years, 1 month
  • Last seen more than 10 years ago
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Interests: Ramsey theory, General Topology, Asymptotic Topology, Dimension Theory, Algebraic Topology, Commutative rings, Set Theory, Forcing, General Number Theory
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20
Estimate on radical of $2^n \pm 1$
17
What are some reasonable-sounding statements that are independent of ZFC?
12
What are the most elegant proofs that you have learned from MO?
12
Countable subgroups of compact groups
8
Kronecker Approximation theorem and Fibonacci numbers