Wikipedia has a lot of resources. Naturally, it won’t all be accessible (some of these constructions sit at the top of a mountain, and you have to climb the mou

Wikipedia has a lot of resources. Naturally, it won’t all be accessible (some of these constructions sit at the top of a mountain, and you have to climb the mountain first). https://en.m.wikipedia.org/wiki/Construction_of_the_real_numbers https://en.m.wikipedia.org/wiki/Construction_of_the_real_num...