(idea) by jt Wed Sep 19 2001 at 3:36:32
In topology, a point p is said to be an accumulation point of a set X if every neighborhood of p contains points of X distinct from p. (Note that p need not be inX.)

For example, on the real line with the usual topology, 0 is an accumulation point of the open interval bounded by 0 and 1, because any neighborhood of 0 contains points (infinitely many, in fact) lying between 0 and 1.

del.icio.us Facebook Digg StumbleUpon Reddit (I like it!)
Y'know, if you log in, you can write something here, or contact authors directly on the site. Create a New User if you don't already have an account.