# 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.

## 1 Comment »

1. […] I worked on some…and was anguished at the elementary mistakes I made. Now if you want to see some of what world class mathematicians work on, read this. This is a […]

Pingback by Math, abs and bench presses « blueollie — April 10, 2015 @ 1:01 am