Solving partial differential equations with the HP Prime and HP 40gs

[Anthony The Koala]

While I understand that using the Lapace transform on the original problem transforms the pde into a second order ode then trnsforming the ode back to the original domain to arrive at a solution.

But I want to know what to key in the buttons to solve the problem.

Two points
(1) I have seen a way to solve a pde for the HP Prime at http://computerlearningservice.com/Acade...Pfunctions

But I had trouble assigning the function f(x,y) := on the HP 40GS.

(2) Going back to Carey's answer. I wanted to solve the pde using the HP 40GS's LAP to do the Laplace transform then ILAP then use DESOLVE to solve the 2nd order ODE then do an inverse Laplace transform using the HP 40GS's ILAP to revert to the original doman.

The documentaion in the HP 40GS manual is lacking in the functions LAP DESOLVE
and ILAP.

Please assist.
Thank you
Anthony, Sydney