Computing thousands or millions of digits of PI with arithmetic-geometric means This is a proof of correctness for an algorithm to compute PI to high precision using an algorithm based on arithmetic-geometric means. A first file contains the calculus-based proofs for an abstract view of the algorithm, where all numbers are real numbers. A second file describes how to approximate all computations using large integers. The whole development can be used to produce mathematically proved and formally verified approximations of PI.
opam install coq-pi-agm.1.0.0