Am Freitag, den 22.01.2010, 10:17 +0100 schrieb Hugo Coolens:
> Is there a reason why Maxima doesn't solve the following example:
>
> ilt(exp(-a*s)/s,s,t);
>
> I expected a heaviside step shifted over a, but maxima just leaves it as
> it is.
Sorry, but the inverse laplace transform of your example is not
implemented. This is a missing feature.
Please have a look at the documentation. It is documented that ilt only
works for a ratio of polynomials.
(%i12) ? ilt
-- Function: ilt (<expr>, <s>, <t>)
Computes the inverse Laplace transform of <expr> with respect to
<s> and parameter <t>. <expr> must be a ratio of polynomials
whose denominator has only linear and quadratic factors. By using
the functions `laplace' and `ilt' together with the `solve' or
`linsolve' functions the user can solve a single differential or
convolution integral equation or a set of them.
Dieter Kaiser