I want to learn artificial intelligence, so I decided to learn maths. I began from one-variable calculus at MIT open course ware. And these lectures seemed to me very easy, especially compared with Apostol's or Spivak's calculus. So I want to ask is it enough MIT open course ware lectures for my goals or I should to learn maths with more hard literature. Update. Oh, of course i talked about 18.01, not about 18.014. So the question is: do I need maths similar to 18.01 for learning artificial intelligence or I need more hard 18.014 like maths?