On Thu, Feb 13, 2020 at 3:16 PM Jean-François Ingenbleek <[email protected]> wrote: > > var("u,v,l",domain=RR) > sigma = vector([u*cos(v),u*sin(v),l*u]) > Dsigma = matrix([[diff(s,u) for s in sigma],[diff(s,v) for s in > sigma]]).transpose() > print(Dsigma) > EFG = (Dsigma.transpose())*Dsigma > EFG.simplify_trig()
this works, but it does not change EFG, you'll need to create a new element, sage: EFG.simplify_trig() [l^2 + 1 0] [ 0 u^2] or overwrite EFG: EFG=EFG.simplify_trig() HTH Dima > print(EFG) > > gives > > [ cos(v) -u*sin(v)] > [ sin(v) u*cos(v)] > [ l 0] > > [ l^2 + cos(v)^2 + sin(v)^2 0] > [ 0 u^2*cos(v)^2 + u^2*sin(v)^2] > > > Why Simplify_trig does not work in this case? > > > Thanks to everybody > > -- > You received this message because you are subscribed to the Google Groups > "sage-support" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sage-support/7b286f22-dd42-4a3e-bb95-f5e1f8638173%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/CAAWYfq3KX4DJtOy%2BKHJRKu0weP6encBvO%3DLBZ2tL-D4-HipKNA%40mail.gmail.com.
