Author-hosted course notes: www.math.utah.edu/~davar/ps-pdf-files/Levy.pdf . Title page: Math7880-1, Spring2011, Davar Khoshnevisan, University of Utah. Lecture7 treats the compound Poisson part and Theorem5 on variation; Lecture8, printed page44, equation2 and Definition4 give the Laplace exponent of a subordinator. This is the full verified Lévy-process notes PDF, not the nonexistent separate Subordinators.pdf URL.