E^iπ Memes

Mathematicians can't escape Euler! He's like the mathematical boogeyman who follows you into every equation! That portrait of Leonhard Euler haunts advanced math classes worldwide - his identity (e^iπ + 1 = 0), his constant (e), his formulas... they're EVERYWHERE! Poor mathematicians trying to solve problems only to find that, once again, Euler already figured it out 300 years ago. It's like playing hide-and-seek with someone who's already hiding in every possible spot. No wonder they're seeing his face around every corner!