From: SourceForge.net <no...@so...> - 2006-07-31 04:46:42
|
Bugs item #1051692, was opened at 2004-10-21 13:00 Message generated for change (Comment added) made by robert_dodier You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1051692&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: Share Libraries Group: None >Status: Closed >Resolution: Rejected Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: VECTORSIMP does not simplfy p~(q~r) Initial Comment: I set all the following flags to TRUE: EXPANDALL, EXPANDDOT, EXPANDDOTPLUS, EXPANDCROSS, EXPANDCROSSPLUS, EXPANDCROSSCROSS, EXPANDGRAD, EXPANDGRADPLUS, EXPANDGRADPROD, EXPANDDIV, EXPANDDIVPLUS, EXPANDDIVPROD, EXPANDCURL, EXPANDCURLPLUS, EXPANDCURLCURL, EXPANDLAPLACIAN, EXPANDLAPLACIANPLUS, EXPANDLAPLACIANPROD I input VECTORSIMP(p~(q~r)); at the prompt The result was WARNING: DECLARE VECTOR INDETERMINANTS NONSCALAR TO AVOID ERRORS & TO GET FULL SIMPLIFICATION (D43) 0 ---------------------------------------------------------------------- >Comment By: Robert Dodier (robert_dodier) Date: 2006-07-30 22:46 Message: Logged In: YES user_id=501686 load(vect); declare([p,q,r],nonscalar); expandall:true; vectorsimp(p~(q~r)); => p . r q - p . q r Looks like the observed behavior is just due to (1) not declaring nonscalar variables and (2) not enabling the expandall flag or expandcrosscross flag. Closing this report as rejected (not a bug). ---------------------------------------------------------------------- Comment By: Barton Willis (willisbl) Date: 2004-10-25 14:07 Message: Logged In: YES user_id=895922 Is this what you wanted? (%i1) load("vect"); (% c:/msys/1.0/maxinstall/share/maxima/5.9.1.1cvs/share/vector /vect.mac (%i2) declare([p,q,r],nonscalar)$ (%i3) EXPANDCROSSCROSS : true$ (%i4) vectorsimp(p~(q~r)); (%o4) (p . r) q - (p . q) r (%i5) Barton ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1051692&group_id=4933 |