College Math Teaching

February 18, 2015

Another way to make a math professor happy…

Filed under: editorial — Tags: — collegemathteaching @ 9:29 pm

One of my topology students came in and pointed out (very respectfully) an error on the online course notes. I had written that $f(x) = \frac{1}{x}$ is a homeomorphism between $(0,1)$ and $(0, \infty)$ and she pointed out that the second interval should be $(1, \infty)$.

I am doing a happy jig…. 🙂