orthopoly & nset



My statement was misleading. Sorry about that.   Thank you for the 
clarification.

Barton





Wolfgang Jenkner <wjenkner@inode.at>
Sent by: maxima-admin@math.utexas.edu
08/30/2003 10:27 PM

 
        To:     Barton Willis <willisb@unk.edu>
        cc:     maxima@www.ma.utexas.edu
        Subject:        Re: [Maxima] orthopoly & nset


Barton Willis <willisb@unk.edu> writes:

> Sometime ago, Stavros discovered a bug in Maxima's orderlessp
> function (bug 776441).  This bug is so old (30+ years), it has been
> nicknamed the Methuselah bug.  Wolfgang Jenkner proposed a fix for
> it, but I don't know if it has been thoroughly tested.  Because nset
> uses orderlessp to order set members, the Methuselah bug can cause
> nset to misbehave.

Please let me just add that I didn't claim that this "fix" was more
than a palliative for the examples reported by Stavros.  In the same
comment in

http://sourceforge.net/tracker/index.php?func=detail&aid=776441&group_id=4933&atid=104933

I also mentioned an even more basic example of misbehaviour, which
isn't fixed by this "fix".

Wolfgang

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