itensor.lisp in maxima-5.6



Hi,

 I think that this is an excellent idea!  Also, it is interesting to look
through the Maxima share directories to see what applications have been
written in the past (although I am not sure of the status of some of these,
i.e., do they indeed work with the current version of Maxima?).  These files
might provide a starting point for such a collection.
Dave Holmgren

Dr. David E. Holmgren,
Imaging Scientist,
SMART Technologies, Inc.
Calgary, AB, Canada
http://www.smarttech.com
[403]-235-1452, ext. 251
DavidHolmgren@smarttech.com

> -----Original Message-----
> From:	Valerij Pipin [SMTP:pip at iszf]
> Sent:	Tuesday, September 25, 2001 9:56 AM
> To:	maxima@www.ma.utexas.edu
> Subject:	[Maxima] itensor.lisp in maxima-5.6
> 
> Dear Maxima's Users,
> 
> Sometimes ago  I revealed it but did not ask. Why the itensor package 
> disappear from maxima-5.6, though one was existed in maxima-5.4. 
> Some changes in another package ctensr was made. Perhaps this results to
> the 
> following: 
> (C1) load(ctensr);
> (D1) 				 ./ctensr.mac
> (C2) load("ctenso.dm1");
> Could not find `max$disk:[tensor]CTENSR.mc' using paths in 
> 
> FILE_SEARCH_MAXIMA,FILE_SEARCH_LISP (combined values: 
> 
> [./###.{mc,mac}, /usr/lib/maxima-5.6/{mac,sym}/###.mac, 
> 
> /usr/lib/maxima-5.6/{share,share1,share2,tensor}/###.mc,
> ./###.{o,lsp,lisp}, 
> 
> /usr/lib/maxima-5.6/{src,share1,sym}/###.o, 
> 
> /usr/lib/maxima-5.6/{src,share1,sym}/###.o, 
> 
> /usr/lib/maxima-5.6/{src,share}/###.lisp,
> /usr/lib/maxima-5.6/{sym}/###.lsp] )
>  -- an error.  Quitting.  To debug this try DEBUGMODE(TRUE);)
> (Well, I tried to correct "ctenso.dm1" by commenting the string where the 
> CTENSR.mc is called and this gives:
> (C3) load("ctenso.dm1");
> Evaluation took 00.10 seconds (00.40 elapsed)
> (D3) 				  ctenso.dm1
> (C4) 
> without any information about what was it done. The same result is with 
> others ctensr.dm#
> What is going wrong?
> 
> One idea about the future of maxima. It would be extremely usefull to make
> an 
> electronic archive about applications of maxima in science. As for me, I'm
> 
> working in turbulence astrophysics and having expirience in calculations 
> typical for turbulence physics (it concerns moslty with averaging
> operations 
> of tensors) I'm going to adopt my codes from mathematica to maxima in near
> 
> future. 
> 
> best regards, Valerij  
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