I'm trying to find out where to learn about integral transforms and inversions like the Laplace transform and the Bromwich integral.
I'm looking for a book that describes how you can find (derive) that the inverse of the Laplace transform is the Bromwich integral and where people got the idea that integral transforms could do anything in the first place.
The books I have just present the Laplace transform like it was handed down from heaven completely out of the blue.
I want to know where it came from, how it was derived, and why it has its properties. I also want to know the same things about Fourier transforms and integral transforms in general.
I've looked up some types of books on the internet and I am wondering which would more likely give me what I need.
I looked up operator theory books, spectral theory books, and operational calculus books but haven't bought anything yet because I don't know exactly what to study.
Can anyone tell me if I'm on the right track, which type of book would tell me what I want to know, or suggest a good book?
Best Answer
As far as I know an early reference for a thorough mathematical theory (in terms of today's mathematical language) of the Laplace transform and its inversion are the books by Gustav Doetsch. (There are several: A three volume handbook, some books on applications, a practical guide...). Probably one of this books also provide insight about the history (i.e. early references, Heaviside formal treatment,...) but I don't know which of them is available in English.
Moreover, there are two articles called "The development of the Laplace transform" by Deakin here and here that could be helpful.
You probably already found the Monthly article "What is the Laplace transform?"?