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Roland Bacher's user avatar
Roland Bacher's user avatar
Roland Bacher's user avatar
Roland Bacher
  • Member for 13 years, 11 months
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43
Can a discrete set of the plane of uniform density intersect all large triangles?
42
A curious identity related to finite fields
39
A limit involving binomial coefficients: $\lim_{n\to\infty} (-1)^n\sum_{k=1}^n(-1)^k{n\choose k}^{-1/k}=\frac12$?
37
An explicit example of a finitely presented group containing a subgroup isomorphic to $(\mathbb Q,+)$.
31
Which power series have bounded integral coefficients and have an inverse given by a series having bounded integral coefficients

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