Acceptance for Turing Machines is Undecidable, but Recognizable
8:08
Decidable iff Recognizable and co-Recognizable Proof
9:00
Emptiness for Turing Machines is Undecidable
24:48
L15: Proof by Diagonalization that ATM (Halting Problem) is Not Decidable
12:59
The Boundary of Computation
4:14
The Halting Problem: The Unsolvable Problem
2:49:40
Turing Machines + Decidability in 3 Hours (TM, Variants, Church-Turing, Decidability)
17:56
Busy Beaver Turing Machines - Computerphile
14:36