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Sergei Ivanov

I am a research fellow at St.Petersburg Department of Steklov Math Institute
  • Saint Petersburg, Russia
  • pdmi.ras.ru/~svivanov
  • Member for 11 years, 1 month
  • 1 profile view
  • Last seen Mar 31 '19 at 22:22

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  • MathOverflow 30.7k 30.7k 11 gold badge7979 silver badges144144 bronze badges

Top network posts

  • 117 solving $f(f(x))=g(x)$
  • 96 Is the sphere the only surface all of whose projections are circles? Or: Can we deduce a spherical Earth by observing that its shadows on the Moon are always circular?
  • 63 How to solve $f(f(x)) = \cos(x)$?
  • 61 Is there a dense subset of the real plane with all pairwise distances rational?
  • 57 Smoothness of distance function in Riemannian Manifolds
  • 56 How do they verify a verifier of formalized proofs?
  • 45 Is every closed set of Q² the intersection of some connected closed set of R² with Q²
  • View more network posts →

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