Because I haven’t posted anything in awhile, I’ve decided to post a nice proof (from awhile back) of what continuity means in a (general) metric space. A slick TFAE theorem/Proof (here).

Because I haven’t posted anything in awhile, I’ve decided to post a nice proof (from awhile back) of what continuity means in a (general) metric space. A slick TFAE theorem/Proof (here).