bos/statistics — Issue #13: S.RootFinding.ridders cannot find root for simple functions
Author: Shimuuar
Created: 2011-10-17 17:29:38+00:00
State: open

Here is an example.

>>> ridders 1e-9 (-1) (1) id
Nothing

Tracing shows that dx becomes NaN whenever s becomes zero and then all other values become NaNs too.

P.S. Could you send me a paper with algorithm description. It's paywalled and my institution doesn't have subscription.