23:59 -!- tapas(n=tapas@affenbande.org) has joined #maxima 00:06 i wonder why maxima fails at factoring large expressions like 00:06 factor(4*a*b^3+4*a*b*fp^2*d^2+a*b*c^2-2*a*b*d^2*f^2-a^2*c*d+4*b^2*fp^2*c*d+2*b^2*c*d*f^2+4*fp^4*c*d^3); 00:06 or can i somehow force it to factor subexpressions first? 00:17 tapas: Do you know the result you are looking for? 00:17 HaraldG: nope.. :) 00:18 I don't think factor can transform a+b+c -> p*q+c, only p*(q+c). 00:18 I guess, this form doesn't exist in your case - but I can't prove it right now... 00:18 ok 00:19 Of course you can manually select subexpressions. This also could be automated, if it is really worth the effort ... 00:20 nah, this was a question of a "lazy" programmer in #math :) 00:20 i.e. how to optimize this expression? 00:21 tapas: optimize in terms of what? 00:22 good question :) 00:22 finding common possible precalculations that save others lateron. i thought maybe factoring might help.. 00:23 There was a recent post on the Mailinglist about optimization of expressions in terms of numbers of multiplications and additions ... 00:23 ah cool 00:24 HaraldG: remember the subject? 00:25 I'm looking it up right now. Not sure when it was. Probably from Stavros ... 00:27 Expression Minimsation, on 30.3.2007 00:27 thanks 00:28 No problem. 01:13 -!- grantgm(n=gabriel@d57-194-175.home.cgocable.net) has joined #maxima 05:38 -!- Prax01D(n=Prax01D@149.99.86.76) has joined #maxima 09:35 -!- paoleela|w(i=xoh6gpv7@gateway/web/cgi-irc/irc.net/x-3604c3d3d5a875ce) has joined #maxima 10:12 -!- lisppaste4(n=lisppast@common-lisp.net) has joined #maxima 11:00 -!- HaraldG(n=rldprog@chello080108070152.13.11.univie.teleweb.at) has joined #maxima 11:45 -!- Prax01D(n=Prax01D@tor58-23b-94-15.dynamic.rogerstelecom.net) has joined #maxima 12:56 -!- Prax01D(n=Prax01D@tor58-24b-98-244.dynamic.rogerstelecom.net) has joined #maxima 13:14 -!- flumoxed(n=daddy@202.134.251.153) has joined #maxima 13:38 -!- HaraldG(n=rldprog@chello080108070152.13.11.univie.teleweb.at) has joined #maxima 14:10 -!- paoleela|w(i=dckixki2@gateway/web/cgi-irc/irc.net/x-4533291b4062dfe3) has joined #maxima 15:29 -!- gabkdlly(n=gabriel@dslb-088-073-044-087.pools.arcor-ip.net) has joined #maxima 19:01 -!- Prax01D(n=Prax01D@tor58-5-77-137.dynamic.rogerstelecom.net) has joined #maxima