Hi everyone, I wish you all a happy new year. I have a (certainly trivial) problem while solving a differential system of equations :
-(2^(r^3)*r^5*D[0](p)(r, th, ph) + 3*(6*a^3*mu*r^9*log(2)^2 - 8*a^3*mu*r^6*log(2) - 2*a^3*mu*r^3 - (a^3*mu - a*mu*r^2)*2^(r^3))*U_0*cos(th) + (2^(r^3)*gg*r^5*rho + 2^(r^3)*r^5)*cos(th))*2^(-r^3)/r^5 == 0 and -(2^(r^3 + 1)*r^4*D[1](p)(r, th, ph) + (6*a^3*mu*r^6*log(2) - 8*a^3*mu*r^3 + (a^3*mu + 3*a*mu*r^2)*2^(r^3))*U_0*sin(th) - (2^(r^3 + 1)*gg*r^5*rho + 2^(r^3 + 1)*r^5)*sin(th))*2^(-r^3 - 1)/r^5 == 0 where p is a function of 3 variables (two in fact, as ph does not play any role). I am trying to solve the first one using : desolve(first_expr==0,dvar=p,ivar=r) and I get the following error : AttributeError: 'NewSymbolicFunction' object has no attribute 'operator' Could someone help me a bit ? My strategy is rather trivial : solve the very simple first equation using an unknown _f(th) function; then solve the second equation. Best regards, Frederic. -- 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 sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
