[sage-support] Re: sage won't simplify something that is clearly 0

2010-11-04 Thread Rob H.
Thanks for your answers. I realize that the problem is because I am working over a polynomial ring over the symbolic ring, but I don't see why that should be forbidden. Especially, since simplifying in a polynomial ring simply involves simplifying each coefficient. Anyway, I tried working over QQ

[sage-support] Re: sage won't simplify something that is clearly 0

2010-11-04 Thread luisfe
On 2 nov, 17:00, "Rob H." wrote: > Hi, > > so here is some sample code: > > var('chi,k') > R.=SR[] > I=R.ideal(x^2) > Rbar.=R.quotient_ring(I) > expr=Rbar(epsilon-(chi^(k-1))^5+chi^(2*k-2)*(chi^(k-1))^3) > view(expr) > print (expr) For the kind of operations you are doing, you should work in QQ[]

Re: [sage-support] Re: sage won't simplify something that is clearly 0

2010-11-03 Thread Mike Hansen
On Wed, Nov 3, 2010 at 9:16 AM, Rob H. wrote: > Here's another simple example of basic simplifications that aren't > processed: > > Does anyone have any suggestions on how to fix/circumvent these > problems? Don't use polynomial rings over the "symbolic ring" -- the "symbolic ring" is not really

[sage-support] Re: sage won't simplify something that is clearly 0

2010-11-03 Thread kcrisman
On Nov 3, 12:16 pm, "Rob H." wrote: > Here's another simple example of basic simplifications that aren't > processed: > > P.=SR[] > F=P.fraction_field() > print F(x/x) > print simplify(F(x/x)) > > Output: > x/x > x/x > > Does anyone have any suggestions on how to fix/circumvent these > problems?

[sage-support] Re: sage won't simplify something that is clearly 0

2010-11-03 Thread Rob H.
Here's another simple example of basic simplifications that aren't processed: P.=SR[] F=P.fraction_field() print F(x/x) print simplify(F(x/x)) Output: x/x x/x Does anyone have any suggestions on how to fix/circumvent these problems? Thanks, +Rob -- To post to this group, send email to sage-s