For ML, the other users gave a good coverage of topics. But AI is an incredibly broad field, and each specialty uses different math topics. Learning all of the math would be infeasible. What are your particular interests?
Russell and Norvig have a good book at http://aima.cs.berkeley.edu that covers many different topics in AI, although it is definitely not comprehensive. I would say that whatever you learn in an undergraduate CS degree would give you a good starting point for learning any particular AI topics.
Russell and Norvig have a good book at http://aima.cs.berkeley.edu that covers many different topics in AI, although it is definitely not comprehensive. I would say that whatever you learn in an undergraduate CS degree would give you a good starting point for learning any particular AI topics.