Quote:
And Count Iblis went on:
"And unlike in Europe, in most US universities you don't learn these topics at undergraduate level:
General Relativity
Advanced Quantum mechanics
Quantum Field Theory
Introduction to String Theory."

Your statement is incorrect to the best of my knowledge ... but again non-relevant to whether professors do or do not teach a class.

I just looked in the preface of the book ''Topics In Advanced Quantum Mechanics'', by Barry R. Hollstein. It says that he wrote it from his lecture notes of a course he taught to graduate students. But this book is is used for third year undergraduate students.

Graduate students here usually don't follow any classes. They start with their Ph.D. research right away. They do have to learn things, but they do that themselves from the literature.