Blogs / Personal blogs

Fredrik Johansson

fredrikj.net

Researcher ( chargé de recherche ) at Inria Bordeaux and IMB ( Canari team). Interests: computer algebra, arbitrary-precision arithmetic.

Popular posts
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377
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#7,092 personal

Visit fredrikj.net → On Hacker News Mar 2014 – Apr 2022

Software Engineering 3Math & Algorithms 3

1

A Grimoire of Functions

I'm the kind of person who reads encyclopedias front to back just for fun, and I've been fascinated by mathematical special functions at least since my first encounter with the gamma function as a teenager. My work implementing numerical and symbolic algorithms in mpmath , Arb and other software projects during the…

3

New partition function record: p(10^20) computed

The partition function p ( n ) counts the number of partitions of n , i.e. the number of ways n can be written as a sum of positive integers when disregarding the order of the terms. For example, 4 has the five distinct partitions 4, 3+1, 2+2, 2+1+1, 1+1+1+1, so p (4) = 5. This week, I set a new record by computing…