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Roland Bacher's user avatar
Roland Bacher's user avatar
Roland Bacher's user avatar
Roland Bacher
  • Member for 16 years, 1 month
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question
54
Most elementary proof showing that exponential growth wins against polynomial growth
Nov 5, 2023
question
48
An explicit example of a finitely presented group containing a subgroup isomorphic to $(\mathbb Q,+)$.
May 3, 2010
question
47
A curious identity related to finite fields
Feb 26, 2014
question
43
Can a discrete set of the plane of uniform density intersect all large triangles?
Oct 29, 2009
question
39
A limit involving binomial coefficients: $\lim_{n\to\infty} (-1)^n\sum_{k=1}^n(-1)^k{n\choose k}^{-1/k}=\frac12$?
Feb 2, 2012
question
31
Which power series have bounded integral coefficients and have an inverse given by a series having bounded integral coefficients
Feb 16, 2015
question
31
Useful tricks in experimental mathematics
May 15, 2011
question
29
Reason for breakdown of a nice binomial identity
Aug 3, 2022
question
27
Explanation why $x,y,z$ are always variables
Jul 2, 2010
answer
26
Conceptual reason why the sign of a permutation is well-defined?
Mar 9, 2022