[ahelwer]

I wanted to read this blog post but it seems uncertain about its intended audience. It goes over a whole bunch of basics like turing machines, circuits, decidable languages, NP, etc. - but too briefly for people unfamiliar with those concepts to understand, and not briefly enough to keep the attention of everyone else. Then we jump to using something called the Hadamard component-wise product which is not defined. I'm sure there's a good post here but it could use trimming in some places and expansion in others.

[JadeNB]

> Then we jump to using something called the Hadamard component-wise product which is not defined.

Aside from the 'Hadamard', which is just the name of a mathematician who used it, it's pretty self documenting, no? Multiply two vectors of the same size by multiplying corresponding components. (This can be viewed as an intermediate, coordinate-dependent step in the computation of the coordinate-independent dot product—although that doesn't seem to be how it's used here.)