[Maxima-bugs] [ maxima-Bugs-1929287 ] 0.0 + [0] ---> [0]

[SourceForge.net <no...@so...>]

Bugs item #1929287, was opened at 2008-03-30 05:34
Message generated for change (Comment added) made by robert_dodier
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1929287&group_id=4933

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Lisp Core - Simplification
Group: None
Status: Open
Resolution: None
Priority: 4
Private: No
Submitted By: Barton Willis (willisbl)
Assigned to: Nobody/Anonymous (nobody)
Summary: 0.0 + [0] ---> [0]

Initial Comment:
OK:

(%i1) 0.0 + 0;
(%o1) 0.0

Not OK; (%o2) should be [0.0], not [0]

(%i2) 0.0 + [0];
(%o2) [0]

Also, 0.0b0 + [0] ---> [0]. Matrix addition has the same bug:

(%i6) 0.0 + matrix([0,0]);
(%o6) matrix([0,0])



----------------------------------------------------------------------

>Comment By: Robert Dodier (robert_dodier)
Date: 2008-04-19 10:32

Message:
Logged In: YES 
user_id=501686
Originator: NO

I'm guessing that the behavior 0.0 + [0] => [0] comes from the same place
as 0.0 + foo => foo, 0.0 + foo(x) => foo(x). Maybe we should disallow the
simplification (inexact zero) + (whatever) => (whatever). Not sure what we
should do at this point.


----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1929287&group_id=4933