00:45 -!- jpromerobx(i=c81f5112@gateway/web/cgi-irc/gluc.unicauca.edu.co/x-c6a863a57951d54b) has joined #maxima 01:24 -!- pocidon(n=pocidon@67.160.210.211) has joined #maxima 01:59 vorago: What are the equations? What exactly are you doing to the equations? 02:22 -!- pocidon(n=pocidon@67.160.210.211) has left #maxima 08:09 -!- paoleela|w(i=x8wroz9s@gateway/web/cgi-irc/irc.net/x-18c18dd7be34b2f7) has joined #maxima 10:09 -!- paoleela|w(i=bory75ea@gateway/web/cgi-irc/irc.net/x-954c7e0a532ca9df) has joined #maxima 12:08 -!- blarney(n=blarney@ip68-228-37-201.tc.ph.cox.net) has joined #maxima 12:09 hi, I'm using the imaxima mode for Emacs, when I use lowercase symbols (x), it translates them inline into uppercase symbols (X), and vice-versa, any ideas why? 12:14 hmm, upgrading to imaxima-imath-0.9.7 from imaxima-0.9.1 seemed to fix it, sorry for the noise 13:27 -!- blarney(n=blarney@ip68-228-37-201.tc.ph.cox.net) has joined #maxima 13:28 hi all, can I put constraints on the solution space using solve()? e.g. in mathematica you can say solve{eq1, eq2, [x1, y2], such that a>0, b<0} etc. 14:31 HaraldG_log, rtoym i can show you; It's possible i did sth, well, wrong. 14:32 [(y-ya)^2+(x-xa)^2 = ra^2, (y-yb)^2+(x-xb)^2 = rb^2]; 14:32 Two 'circles'. 14:32 solve(%,[x,y]); 14:33 I know it's not easy, such a thing can have, one, two or infinite number of solutions 14:33 But i don't think it should act like this. My versions: 14:33 Maxima 5.11.0 http://maxima.sourceforge.net 14:33 Using Lisp GNU Common Lisp (GCL) GCL 2.6.7 (aka GCL) 14:35 I also sometimes have a: Error in PROGN [or a callee]: Caught fatal error [memory may be damaged] 14:35 If I continue working with maxima after Ctrl-C the previous solve. 14:36 With three equations (of 3 circles) it just gives no answer and finishes. 14:40 blarney, there's 'assume()' 14:41 blarney, but I don't know any details. Try assume(a>0); assume(b<0) and then solve. 14:53 vorago: solve is not very smart. It's very possible you've found a bug. 14:54 vorago: That fatal error is a gcl error. Usually trigged by either running out of memory, or gcl making wrong assumptions about something and trashing memory. Other lisps don't usually have this problem. You'll probably still get an error, but memory won't be trashed. 15:03 Hm, that's ok. As long as i can just restart it this gcl-memory-thing does not bug me much... (-; 15:03 And it had happened only in this situation by now. 15:04 vorago: I tried that ;) 15:04 I can solve those equations by hand, but would you propose posting those 'bug-related-info' somewhere? 15:05 vorago: http://www.math.utexas.edu/pipermail/maxima/2006/000131.html 15:06 Heheh. 15:06 more relevant is the reply: http://www.math.utexas.edu/pipermail/maxima/2006/000132.html 15:06 That proves that solve really is not very smart... 15:06 :( 15:08 however it happened to me that solve asked me few questions itself. 15:08 I don't remember when. 15:09 is there a workaround to this? I want to pare down the number of solutions I need to look at 15:11 Assume DOES something. I think it's possible to first call solve(), 15:11 and then strip unneeded solution with other methods. 15:12 However I would call myself 'a sunday Maxima user'... 15:12 So don't ask me. ;) 15:14 ACTION is a once-a-month maxima user, who may need to became a more regular one, lest he fall in the hands of the evil Wolfram vortex 15:14 ;-) 15:15 Maxima is really cool. Is simplifies much if you know how to use it. 15:16 I really don't want to have to install Mathematica if I can avoid it, both for practical as well as philosophical reasons 15:17 You can try 'Octave' but i don't consider it better. 15:17 practical: clunky to run with license server etc, philosophical: it's not open-source, Wolfram is an evil genius meglomaniac ;) 15:18 ;) 15:18 I'm also using Octave but it doesn't do much (or any) in the way of symbolic algebra 15:18 AFAIK 15:19 Octave is my MATLAB replacement and I am hoping that maxima will be my Mathematica replacement ;) 15:24 ;-) 15:25 I'm sure it can be done. However rather unsure if it does not involve lisp knowledge. 15:32 vorago: ok, thanks gotta go now, may be back later 16:26 -!- HaraldG(n=rldprog@chello080108070152.13.11.univie.teleweb.at) has joined #maxima