Maxima by Example: Ch. 7, 8, 9, 10, and 11 posted

Tensor calculus would be interesting in a Maxima book, but I doubt we want
to hitch our wagon to Myron Evans.

I am certainly not competent to judge his work myself, but as far as I can
tell, Evans' ECE theory has not been accepted by any serious physicist.  The
Wikipedia article Eistein-Cartan-Evans theory has some interesting
citations, including http://www.springerlink.com/content/l1008h127565m362,
an editorial in a journal where Evans published some of his results which
reports their refutation.

It is also odd that Evans' Web site, aias.us, talks so much about Evans' UK
government honors, his nominations (nominations!) to knighthood, his coat of
arms, etc.

                 -s

On Wed, Apr 29, 2009 at 8:49 PM, Dave Feustel <dfeustel at mindspring.com>wrote:

> On Wed, Apr 29, 2009 at 04:48:22PM -0700, Edwin Woollett wrote:
> > The old chapter seven has been split into 7 plus 10 for ease of
> maintenance.
> > However, all (7 - 11) have been updated with a fancy verbatim environment
> > plus the latex color package to make the maxima code stand out better.
> > (ch. 1 - 6 remain to be updated with this style.)
> >
> > New material is:
> > ch. 8: numerical integration,
> > ch. 9: bigfloats and arbitrary precision quadrature,
> > ch. 11 fast fourier transforms
>
> Have you thought about including a chapter on tensor calculus and
> differential geometry with reference to General Relativity? Dr. Myron
> Evans writes that he has used maxima to prove a fundamental error in
> Einstein's General Relativity - namely that torsion cannot be zero when
> curvature in non-zero. The calculations are available in the papers
> section of his website, aias.us. The implications for general relativity
> of non-zero torsion appear to be wide-ranging and Dr. Evans has been
> writing a lot of papers investigating those implications.
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