richard noel fell wrote:
> In the share directory is a package written many years ago, gamalg, to
> do gamma matrix algebra. This seems to be broken, to wit, trying the
> gam.dem package,
>
> (c1) loadfile(gam.dem,>,share);
>
> Error: ((MNCTIMES) | $gam| |$dem|) cannot be coerced to a string.
> Fast links are on .........
>
> Alternatively,
> (c1) loadfile(gamalg,>,share);
> Loading gamalg.lsp
> Finished loading gamalg.lsp
> (D1) done
> (c2) tr(p,q);
> Error: (MLIST SIMP) is invalid as a function.
> Fast links are on:.......
>
I've got similar error with gamalg. So it seems that right now
the package is not in workable state. I guess it was OK some
time ago but later things get broken, maybe at the moment
when original Macsyma code was adapted to GCL, and
just nobody cared to fix this very package.
Right now I'm reviewing Maxima share* packages and it seems
that many of them are in similar state. Some efforts are required
to bring them back to life.
>
> Did this package work at some time? I wrote a gamma algebra package to
> use with commercial Macsyma for a specific problem. It was naive, but it
> worked in a very large calculation (Phys. Rev. Lett. 79, 18 (1997)). It
> would be nice if maxima had a working gamma algebra package and it seems
> reasonable to look at the prior work first as it seems to have many more
> features ( The source code is in share2. ) I am willing to do this, but
> before doing so find out if anyone is aware of bugs in this program as
> it stands now. A search of groups in google produced no information.
> Thanks,
> Dick Fell
> _______________________________________________
> Maxima mailing list
> Maxima@www.math.utexas.edu
> http://www.math.utexas.edu/mailman/listinfo/maxima
--
[ Vadim V. Zhytnikov <vvzhy@mail.ru> <vvzhy@td.lpi.ac.ru> ]