He's awesome! I'd recommend him as a professor to anybody who is planning to take a math class.

He makes the material interesting, and very effective.

The best part? 100% final!

David is one the nicest, most genuine professors I could ever imagine existing. He took his PhD at UCLA in 2005 and has been teaching here since then. I hope he stays at UCLA forever, because his teaching style and interaction with other professors, TAs, and students make him one of the most approachable, motivating, and caring professors on campus.

His lectures are ALWAYS engaging. I'm a math major, and have never taken a class in the department whose material I didn't find intersting on some level, but there are definitely professors that just make you discouraged or apathetic when they drag on forever, lecture exactly out of the book, or have no life in them whatsoever and no ability to interact with students other than answering questions like a computer. David is extremely human, and is always thinking as hard as he can to explain or present his material in the most engaging and approachable way.

Also, this guy is freaking nuts. He just finished writing a huge analysis book he's using to teach 131A in S11, and he self-printed the book and sold it out of his office for $30. Needless to say, the book is extremely unique and really a wonderful intro to the subject. He's writing vol.II and another book on probability as you read this.

Also, he's familiar with a lot of different subjects. He studied physics for his undergrad, works in analysis, probability, quantum theory, and topology.

This guy should be in charge on the math department.