It seems to me that the entire point of the post was "let's write a bare-bones program to create pretty pictures out of fractals", and that's what the post does.
Set theory is fantastically interesting and powerful, but it's very very understandable to brush past it so we can get to the pretty pictures.
Also, if I do actually "take 3 seconds and search 'introduction to set theory'" I find two (excellent)[0] resources that, in their introductory paragraphs alone, rival the largest sections of the original link.
Set theory is fantastically interesting and powerful, but it's very very understandable to brush past it so we can get to the pretty pictures.
Also, if I do actually "take 3 seconds and search 'introduction to set theory'" I find two (excellent)[0] resources that, in their introductory paragraphs alone, rival the largest sections of the original link.
[0] - https://en.wikibooks.org/wiki/Set_Theory/Introduction
[0] - http://www.math.toronto.edu/weiss/set_theory.pdf