Talk:Saturated set

Two different concepts
The two definitions are given here are not equivalent, so at least the phrasing must be changed.Lapasotka (talk) 11:46, 27 February 2018 (UTC)

For example: let p : R → S be a surjection which wraps the reals around a circle; let C be an interval in R such that p(C) ≠ S. Then C is an open set and so saturated by the first definition, but p−1p(C)≠C''.