I haven't kept up to date with the dsolve work that was done this summer, but from as far as I know, there are no solvers implemented to handle this one. Do you know what a good method to solve it would be, which can be implemented?
Aaron Meurer On Tue, Jan 7, 2014 at 8:10 AM, Gert Van den Eynde <[email protected]> wrote: > Hi, > > I was trying to solve the laplace equation in spherical coordinates with > angular symmetry: > > from sympy.interactive import printing > printing.init_printing() > import sympy as sym > r = sym.symbols('r') > f= sym.Function('f') > > eq = sym.Eq(sym.Derivative(r**2*sym.Derivative(f(r),r),r) + r**2*f(r) , 0) > display(eq) > sym.classify_ode(eq,f(r)) > sym.dsolve(eq,f(r)) > > > returns > > [...] > > NotImplementedError: solve: Cannot solve r**2*f(r) + r**2*Derivative(f(r), > r, r) + 2*r*Derivative(f(r), r) > > > As far as I understand Sympy's classify_ode and dsolve do not recognize this > equation. Or am I missing something? > > Is this expected behaviour? > > Best regards, > Gert > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
