# College Math Teaching

## April 9, 2015

### I’d be a better mathematician if I weren’t so freaking dumb!!!!

Filed under: academia, editorial — Tags: — collegemathteaching @ 7:45 pm

I have some time to think about things, and I got hung up on a detail…and the resolution of said detail was realizing, that if $f$ is a bijection (one to one and onto), then $(f^{-1})^{-1} = f$.

ARRRGGGHHHHH!!!!!!!!!!!!

Back to work.