Actually i saw questions about fourier integrals in one of the past papers and then there was a question in another paper about integral curve...if we perceive this topic in such dimension its gonna be too lengthy.
Sir would you please suggest any good book for heat and wave equation. i have book of Nawazish ali shah but that book contains a lot of material about heat and wave equation like heat and wave equation in infinite bar, in infinite string, in finite bar, in semi finite bar and a lot of such material....so the point is too much cases just make me bewildered....therefore i want your guidance about this.