Problem with Laplace transform

[JMB]

Hi

Both the "laplace" and "ilaplace" functions have three parameters: expression, variable of the expression, and variable of the result. The last two variables are optional, but it looks like if you don't specify them, the calculator uses the variable x as the default variable.

With firmware 2015 6 17 (8151), you have the following results:

laplace(1): 1/x

laplace(1,t,p): 1/p

ilaplace(1/x): 1

ilaplace(1/p): Dirac(x)/p ---> wrong

ilaplace(1/p,p,t): 1

So, it seems that sometimes the two last variables are necessary, in order to get correct answers.

I hope this heps.