PlanetMath (more info)
 Math for the people, by the people. Sponsor PlanetMath
Encyclopedia | Requests | Forums | Docs | Wiki | Random | RSS  
Login
create new user
name:
pass:
forget your password?
Main Menu
[parent] Viewing Message
``Re: Subbasis: Missing condition?'' by dfeuer on 2007-10-11 14:53:20
Another approach (which Kelley uses) is to drop X:

If S is a set of sets, then (in pseudo-TeX) { \cap T : T \subset S, T is finite, and T \neq 0 } is the basis for a topology on the union of S.
[ reply | up | top ]
Interact
reply