Tim Wescott wrote:

> Yup. Given a PDF I'd _like_ to be able to solve for the
> expected value of the four vector elements, as well as their
> cross-correlation. I'd like this to be in a form that's
> tractable enough that I can code it into an algorithm without
> either making people's heads explode when they read it and
> without making the processor bog down.
>
> But for now I'll just settle with being able to get the element
> means and variances out of the thing for a variety of variances
> of the Gaussians, or a clear indication that if I insist on
> using Gaussians the math is going to be hopelessly intractable.

How have you decided to project the Gaussian from Euclidean space to
the 3-sphere?


Martin

--
Quidquid latine scriptum est, altum videtur.