18.404J/6.840J The Theory of Computation(Fall 2020, MIT OCW). Instructor: Prof. Michael Sipser. This course emphasizes computability and computational complexity theory. Topics include regular and context-free languages, decidable and undecidable problems, reducibility, recursive function theory, time and space measures on computation, completeness, hierarchy theorems, inherently complex problems, oracles, probabilistic computation, and interactive proof systems.
(from ocw.mit.edu)
Quickly reviewed last lecture. Introduced exponential complexity classes and demonstrated a "natural" provably intractable problem. Introduced oracles and relativized computation to suggest that pure diagonalization-based methods cannot separate P and NP.