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.
