Re: [eigen] MathFunctions.h patch

[Mark Borgerding <mark@xxxxxxxxxxxxxx>]

Benoit Jacob wrote:
> It is on purpose that we excluded sqrt for complex numbers:
>  - there is no canonical choice between the 2 determinations of the square root.
Just a pedantic note. There are two square roots of real numbers too.  
Conventionally, sqrt(4) returns 2, not -2.

Returning the root in the right half plane (non-negative real) would 
seem a logical generalization of this convention.