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

As I said, I am not competent to judge Myron Evans' ECE work. However, the
very journal where he published his work pointed
out<http://www.springerlink.com/content/l1008h127565m362/fulltext.pdf>that
"no reference to ECE theory can be spotted in any of the peer reviewed
scientific journals" and it also published papers showing mathematical
errors in ECE.

I repeat, I doubt we want to hitch our wagon to Myron Evans.

            -s

PS The Wikipedia article about
ECE<http://en.wikipedia.org/wiki/Einstein%E2%80%93Cartan%E2%80%93Evans_theory>has
*not* been removed, and you don't have to believe that article to look up
the sources it cites.


On Wed, Apr 29, 2009 at 11:13 PM, Dave Feustel <dfeustel at mindspring.com>wrote:

> On Wed, Apr 29, 2009 at 09:43:08PM -0400, Stavros Macrakis wrote:
> > Tensor calculus would be interesting in a Maxima book, but I doubt we
> want
> > to hitch our wagon to Myron Evans.
>
> The question is not whether or not to 'hitch our wagon' to Myron Evans,
> but whether Evans' ECE theory correctly predicts physical phenomena not
> explainable by Maxwell-Heaviside or standard GR theory. To the best of
> my knowledge, noone has refuted any data explained by him in terms of
> ECE. I have definitely got the impression that few, if any, people
> reading his papers understand the mathematics of differential geometry
> upon which ECE is based.
>
> > 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.
>
> Evans has stated that in GR a non-zero curvature *requires* a non-zero
> torsion and Evans has published a proof based upon a symbolic derivation
> of torsion from curvature using Maxima. If that assertion can be
> verified by an independent third party, then Evans' work destroys the
> bulk of 'standard' GR. I am interested in a verification or
> falsification of that assertion using any symbolic math package.
> I bought Maple 12 with that idea in mind. I still am pursuing the
> same goal with Maxima, but much more low key for lack of hard copy
> documentation. I am having increasing vision problems which make
> reading books much easier than reading CRT screens.
>
> > 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.
>
> Focus on the accuracy of Evans' work. Forget about Wikipedia where Evans is
> concerned. The Wiki entry about him and his work has been completely
> removed.
>
> > 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.
> > > _______________________________________________
> > > Maxima mailing list
> > > Maxima at math.utexas.edu
> > > http://www.math.utexas.edu/mailman/listinfo/maxima
> > >
> _______________________________________________
> Maxima mailing list
> Maxima at math.utexas.edu
> http://www.math.utexas.edu/mailman/listinfo/maxima
>