Course was based on the classic Mathews and Walker book "Mathematical Methods of Physics" with references to Hamermesh's "Group Theory" and also Georgi's "Lie Algebras in Particle Physics". He alternated the class lectures between PDE's and Group Theory, which I found to be an albeit unconventional yet refreshing way to learn about two different topics. Problems were difficult and time-consuming, but his grading was fair. His teaching style is based on the texts, with particular emphasis put on mathematical techniques that he finds most useful in his research (check out his website for more on that). One of my favorite graduate professors.