
Ublas : 
From: Georg Baum (Georg.Baum_at_[hidden])
Date: 20070910 10:27:52
Am Montag 10 September 2007 16:21 schrieb Paul C. Leopardi:
> The second is a matrix square root, ie. M1 == sqrt(M2) <=> M1 * M1 == M2.
> This corresponds to the Matlab sqrtm function.
> See
> http://www.mathworks.com/access/helpdesk/help/techdoc/ref/sqrtm.html
This is actually the more interesting one :) If you need to implement this,
have a look at Nick Higham's papers on matrix funtions:
http://www.maths.manchester.ac.uk/~higham/papmf.html
The matlab sqrtm is (or was, I don't know about recent versions) based on
his code.
Georg