Actually, if we could get the integrals themselves to work, that would be even better. It would also be nice to get the correct convergence conditions (as I recall, you need f(x) to grow sufficiently slow for the integral to converge).
Aaron Meurer On Sat, Nov 30, 2013 at 11:24 PM, Aaron Meurer <[email protected]> wrote: > Yes, we need to implement a table lookup for these kinds of rules. The > same applies to other integral transforms as well. > > Aaron Meurer > > On Sat, Nov 30, 2013 at 4:24 AM, Juan Luis Cano <[email protected]> wrote: >> Hello all, >> >> I was playing with Laplace Transforms on SymPy and I was wondering if >> there's a way to make them work with undefined functions: >> >> In [2]: x = Function('x') >> >> In [3]: from sympy.abc import s >> >> In [4]: laplace_transform(x(t).diff(), t, s) >> Out[4]: LaplaceTransform(Derivative(x(t), t), t, s) >> >> I expected s * x(s). The inverse doesn't work either: >> >> In [5]: inverse_laplace_transform(s * x(s), s, t) >> Out[5]: InverseLaplaceTransform(s*x(s), s, t, _None) >> >> Looking at the source code I guess it's impossible to deduce these kind of >> properties by just attempting to do the Integral. Is there any other way? >> >> Thanks in advance >> >> Juan Luis Cano >> >> -- >> 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.
