/sci/ - Science & Math

>>12379843
>The closure of a set S is the union of S and the limit points of S.
In that case the closure of the rationals is just the rationals, so you don't get anything new.
>https://en.wikipedia.org/wiki/Dedekind_cut
>I'm not going to even attempt to reinvent the wheel on that one.
Ok I opened the link and it says dedekind cuts are sets with certain properties listed. Can you explain to me what a set it? At least what it means in your interpretation. What's the boundary between a set and not a set?

>>12167404
>let the real people with knowledge about free will talk about, schizo
Are you saying that I'm not... real? What do you think I am?

>The retards actually think that proving p^2 + a^2 = (a+1)^2 has a unique solution for prime p and integer a is the same as proving that if p^2 + a^2 = b^2 then b=a+1.