Mastodawn

That's a nice collection #econtwitter:
10 Fundamental Theorems for Econometrics https://bookdown.org/ts_robinson1994/10_fundamental_theorems_for_econometrics/

10 Fundamental Theorems for Econometrics

This book walks through the ten most important statistical theorems as highlighted by Jeffrey Wooldridge, presenting intuiitions, proofs, and applications.