Young Alan Turing and the Arctangent (angrystatistician.blogspot.com) 16 points by octonion 11y ago ↗ HN
[–] tempodox 11y ago ↗ What is “undercontrained”? [–] Pitarou 11y ago ↗ He means "underconstrained".In other words, there is more than one function that satisfies the relation f(2x) = f(x) * f(x), so we need to find some more constraints to exactly pin down the Maclaurin expansion of exp(x).
[–] Pitarou 11y ago ↗ He means "underconstrained".In other words, there is more than one function that satisfies the relation f(2x) = f(x) * f(x), so we need to find some more constraints to exactly pin down the Maclaurin expansion of exp(x).
[–] kranner 11y ago ↗ The author seems to have linked to the wrong book as the inspiration for the movie though the author's name is correct.This is the book I remember seeing named in the credits: http://www.amazon.com/Alan-Turing-Enigma-Inspired-Imitation-...
[–] [dead] brandon_Nav1000 11y ago ↗ Great book inspiration you got there. Although inverse trigonometric functions are never really my thing.
4 comments
[ 3.3 ms ] story [ 19.9 ms ] threadIn other words, there is more than one function that satisfies the relation f(2x) = f(x) * f(x), so we need to find some more constraints to exactly pin down the Maclaurin expansion of exp(x).
This is the book I remember seeing named in the credits: http://www.amazon.com/Alan-Turing-Enigma-Inspired-Imitation-...