Wolfgang,
Actually, I've been in touch with Valery all last week, and many of the
changes I submitted were in fact his.
I also received his stuff on Levi-Civita, etc., I just wasn't quite done
with them. That said, Valery's code works quite well, I only had to do some
minor changes, some of which were fixes that Valery sent to me, some were
modifications to take advantage of the repaired functionality in ITENSOR.
All updated now.
The bottom line is that, barring any buglets, ITENSOR/CTENSR now function
"as designed". Repaired in particular are COMPONENTS, REMCOMPS, and COVDIFF.
I also enhanced CHR1 and CHR2 to be able to cope with derivative indices, so
it is no longer necessary to do stepwise evaluation of expressions
containing them using UNDIFF, EV(..,CHRx), EV(..,DIFF). A simple EV(..) will
now suffice.
Viktor
-----Original Message-----
From: maxima-admin@math.utexas.edu [mailto:maxima-admin at math] On
Behalf Of Wolfgang Jenkner
Sent: Sunday, April 25, 2004 1:04 AM
To: Valery Pipin
Cc: maxima@www.ma.utexas.edu; James Amundson
Subject: Re: [Maxima] [Fwd: MAXIMA tensors]
Valery Pipin <pip@iszf.irk.ru> writes:
> On Friday 16 April 2004 10:06, James Amundson wrote:
> | I am forwarding this on Viktor Toth's behalf. Is anyone *currently*
> | working on the tensor package?
> |
> I'm working with it in everyday work. I consider the cvs version as
workable
> (in most cases). I also wrote some extension to manage the Levi-Civita
> symbols and these packages were posted to the list an year ago. I belive
> that cvs version gives correct results on examples given in the manual as
> well. These exaples are reproduced in itensor.dem. I guess Viktor should
> check the cvs firstly.
I have checked in Valery's package now. This is very interesting
stuff and I am sorry that it somehow went unnoticed a year ago.
I'd like to add that de facto Valery has been maintaining
share/tensor, so in my opinion he ought to be offered CVS write
access.
Wolfgang
_______________________________________________
Maxima mailing list
Maxima@www.math.utexas.edu
http://www.math.utexas.edu/mailman/listinfo/maxima