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Fredrik Johansson's user avatar
Fredrik Johansson's user avatar
Fredrik Johansson's user avatar
Fredrik Johansson
  • Member for 14 years, 8 months
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I work on computer algebra, arbitrary-precision arithmetic, rigorous numerical computing.

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23
Does the Fourier expansion of the j-function have any prime coefficients?
Nov 25, 2020
answer
21
Numerical integration using interval arithmetic, nowadays
Aug 31, 2016
answer
20
Does Rademacher's convergent series for p(n) define an analytic function?
Jul 28, 2020
answer
19
Faster computation of p-adic log
May 21, 2022
answer
18
Is $\sum_{k=1}^{n}\frac{(n-1)!}{(k-1)!}$ composite for $n\geq 4$?
Jul 27, 2020
question
13
Simple/efficient representation of Stirling numbers of the first kind
Aug 1, 2010
question
9
Explicit bound for sum of Kloosterman sums
Nov 25, 2020
answer
9
About one series. Are there some related special functions?
Feb 16, 2012
answer
7
Chudnovsky formula vs. Machin type formulae for calculating $\pi$
Mar 16, 2017
answer
7
On a certain integral representation for Hurwitz zeta functions
Jul 13, 2018
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2297
What's the canonical way to check for type in Python?
147
Preserving signatures of decorated functions
89
Writing your own square root function
59
How do I manipulate bits in Python?
19
What are the efficient, accurate algorithms for evaluation of hypergeometric functions?