Is partial differential equations pure math? I was looking at a applied differential equations textbook with fourier series and boundary value problems but I hardly see any numbers and seems like all of them are proof based. Is this true? Can you suggest me a good textbook for partial differential equations for physics and engineering majors? Thanks.

Question

anonymous · Answer

They will not be totally proof based in an applied class, they will mostly just be some basic theoretical justifications for using Fourier series (and other orthogonal expansions).