![18-10-pdesolve-error[1].png](https://community.ptc.com/t5/image/serverpage/image-id/4980i0D828570E23F22F7/image-size/large?v=v2&px=999 "18-10-pdesolve-error[1].png")
![18-11-Pde-Plate-Progr[1].png](https://community.ptc.com/t5/image/serverpage/image-id/4981i4E16150453BFE1D6/image-size/large?v=v2&px=999 "18-11-Pde-Plate-Progr[1].png")
![18-12-Counter-Plot[1].png](https://community.ptc.com/t5/image/serverpage/image-id/4982i4ACC3F4904E742A8/image-size/large?v=v2&px=999 "18-12-Counter-Plot[1].png")
I Iramoslima,
the argument, as you know, is vast and complicated. I give you an outline about the difference method theory which is almost similar to the one on finite elemets method, to get an idea of what it is. I add some examples, of which some are downloaded from the community. I forgot to tell you that some results must be verified since they are not copied by some text.
1)
Greetings
FM
Hi,
when working with partial differential equations we can replace partial derivatives with finite differences approximations as previously seen. If we opt for finite element method, we must seek an approximation w to the unknown function like this:
where P(x) is a prescribed function (basis functions or trial functions or shape functions) and unknown coefficients u.
