Re: [sage-devel] weirdness in simplifying a symbolic expression

2010-01-14 Thread Craig Citro
Yeah, this is wacky. I can tell you why it's happening, though someone who's ever used Maxima before should really think about the right fix. Here's the issue: in sage.calculus.calculus, there's an instance of Maxima that gets created and passed the argument 'load(simplify_sum)'. This causes the ex

Re: [sage-devel] weirdness in simplifying a symbolic expression

2010-01-14 Thread Minh Nguyen
Hi Nick, On Fri, Jan 15, 2010 at 3:14 PM, Nick Alexander wrote: > To me, these look like the same expressions, just one has variables sorted > differently (h < e?) and different term orders. What is the issue? Something like the following is OK: [mv...@mod sage-4.3.1.alpha2-sage.math.washin

Re: [sage-devel] weirdness in simplifying a symbolic expression

2010-01-14 Thread Nick Alexander
sage: y = expand(K.det()); y a*d*e*h - a*d*f*g - b*c*e*h + b*c*f*g sage: simplify(y) -a*d*f*g + a*d*h*e + b*c*f*g - b*c*h*e To me, these look like the same expressions, just one has variables sorted differently (h < e?) and different term orders. What is the issue? Nick -- To post to thi

[sage-devel] weirdness in simplifying a symbolic expression

2010-01-14 Thread Minh Nguyen
Hi folks, I got the following weirdness from a bug report on Facebook. The report references this worksheet: http://www.sagenb.org/home/pub/1362/ [mv...@mod sage-4.3.1.alpha2]$ ./sage -- | Sage Version 4.3.1.alpha2, Release Dat