# Thread: Seperation of variables or fourier transform to solve a PDE?

1. ## Seperation of variables or fourier transform to solve a PDE?

how do you know when to use seperation of variables or fourier transform to solve a PDE? will the qns state which method we have to use?

2. Are you on a finite or infinite (semi infinite) domain?

3. finite domain

4. Then use separation of variables.