I really enjoyed taking this class! His lectures were well organized and he always posted lecture notes in case you had to miss a class. He was very approachable and helpful during office hours. I thought 131A would be challenging but I believe I really understood the proofs and the content. Overall, I would definitely recommend taking 131A with Prof Ding.

Details on the class:
Homework (drops lowest score), 2 midterms (can drop 1 midterm), and a final. The homeworks were manageable given that we had a week to complete it. The exams were very fair and his practice exams and notes are very helpful.