A short lecture notes for the first seven weeks: Laplace transform, Fourier transform and differential equations (latest version) laplace_fourier_3.pdf

An excerpt on complex Fourier Series (from the 9th edition of the book): kap114.pdf

There are also notes on various topics of the course to be found on the home page of the course from 2017 (although in Norwegian): start

2018-09-25, Xu Wang