[sage-devel] A bug in symbolic computations

2009-12-17 Thread Nathann Cohen
Hello everybody !!! As usual, as I do not know how to report such bugs, I prefer to send an email here and trust you :-) I happened to type in sage : var('i j k l p') e=(2*i+s+t)/((i+s)*(i+t))(2*i+q)/(i*(i+q)) This formula uses a variable i, which should be fine ( or clearly forbidden ).

Re: [sage-devel] A bug in symbolic computations

2009-12-17 Thread David Joyner
On Thu, Dec 17, 2009 at 9:10 AM, Nathann Cohen nathann.co...@gmail.com wrote: Hello everybody !!! As usual, as I do not know how to report such bugs, I prefer to send an email here and trust you :-) I happened to type in sage : var('i j k l p') e=(2*i+s+t)/((i+s)*(i+t))(2*i+q)/(i*(i+q))

Re: [sage-devel] A bug in symbolic computations

2009-12-17 Thread Nathann Cohen
Hello Is sage: e = (2*x+s+t)/((x+s)*(x+t))(2*x+q)/(x*(x+q)) sage: (e.rhs()-e.lhs()).full_simplify() -((q - s - t)*x^2 - q*s*t - 2*s*t*x)/((q + s + t)*x^3 + q*s*t*x + x^4 + ((q + s)*t + q*s)*x^2) useful? It is !!! But I thought is could be in some way detected and simplified by

Re: [sage-devel] A bug in symbolic computations

2009-12-17 Thread Burcin Erocal
Hi, On Thu, 17 Dec 2009 11:16:52 -0500 David Joyner wdjoy...@gmail.com wrote: On Thu, Dec 17, 2009 at 9:10 AM, Nathann Cohen nathann.co...@gmail.com wrote: Hello everybody !!! As usual, as I do not know how to report such bugs, I prefer to send an email here and trust you :-) I