From: boost (boost_at_[hidden])
Date: 2001-05-25 20:33:19
Salut,
On Saturday 26 May 2001 01:09, you wrote:
> Paris (U.E.), le 26/05/2001
>
> --- In boost_at_y..., Kevin Lynch <krlynch_at_b...> wrote:
[...]
> Square roots do not behave very nicely with quaternions (they give
> full spheres of answers, and to illustrate, we see immediately that i,
> j and k are all square roots of -1). There might be some trick with
Well, even square root for real/complex numbers don't behave nice.
Isn't there a 'catastrophe theory' dealing with branching points.
Best wishes,
Peter