wow

https://en.wikipedia.org/wiki/Krohn%E2%80%93Rhodes_theory

Also applicable to AI, psychology, physics.
Also there's a version for category theory.

It's about deciphering and classifying the fabric of space and time. 

I even read a book once dedicated to it, but I still remained clueless.

added a section to wiki's MapReduce article

 https://en.wikipedia.org/wiki/MapReduce#Theoretical_Background

Critique welcome.

now, again, Krohn-Rhodes theory

 A finite monoid can be decomposed to a bunch of simple finite groups (afaik, there are 26 kinds of them) and a parallel array of flip-flops.
Since an FSM is basically a monoid, an FSM can be decomposed the same way.

And I wonder, regexes, they can be decomposed/classified the same way.

Anybody here familiar with all this? I just found it.

here is the post I wrote

 https://vpatryshev.wordpress.com/2017/01/11/three-popular-fp-myths-2

That's James and Saunders bashing (in a generalized monoidal sense).

откуда палачи

 Мне вот интересно, в 1917-м году в России никто никого не пытал (практически; я не считаю оргпреступность); а несколько лет спустя уже по всей стране пытки стали обыденным делом.

Хрен с ними с доносами; откуда взялось столько палачей?! Кто их научил пыткам?