I've just started watching the series, and in Lecture 1 he's talking about 6 primitive fundamentals. What are they?

Question

anonymous · Answer

He was talking about the mathematical definition for a Turing Machine: A Turing  Machine is an ordered 6-tuple M = (S, Sigma, d, s0, B, A). S is a set of states (machine states), Sigma is an alphabet the machine understand, d is a function: the elements in the domain of d are in a subset of (S x Sigma) and its range is a subset of (S x Sigma x {r,l,h}). In fact d is a set of instructions; so, do not worry, he was not talking about Python.

anonymous · Answer

I see, thanks!

Could you please link me to an article explaining what you said in more detail?