Boost logo

Boost :

From: boost (boost_at_[hidden])
Date: 2001-05-28 04:57:13


Bonjour Hubert Holin,

On Saturday 26 May 2001 23:59, you wrote:
[..]

> Well, "catastrophe theory" is mostly concerned with the
> classification, stability and transformation of some kinds of
> singularites, but that's not very far.
And sqrt(x) is a simple, but important example.
>
> Indeed, there is some substantial corpus of knowledge in that
> field ("analytic" continuatioon, Riemann surfaces, etc.), even, if I
> recal, some dealing specifically with quaternions. It's just that I
> haven't had the time to correctly explore that aspect. And since I do
> that research in my free time while commuting (my daywork is hardly
> worth mentioning >-< )... and that I have a few other topics of active
> research... it may take some time before I can produce something
> worthwile in that field. But eventually I will tackle that...

You already have this problem with arctan<complex>.
I would suggest that it's sufficient to document the restirction on the
import. Once the's branch cut you just can't do it right.

Best wishes
Peter


Boost list run by bdawes at acm.org, gregod at cs.rpi.edu, cpdaniel at pacbell.net, john at johnmaddock.co.uk