It says: Euler's identity Euler's famous identity ties the "five fundamental constants of mathematics" together: \[e^{i\pi}-1=0\] The "-" should be a "+" T

It says: Euler's identity Euler's famous identity ties the "five fundamental constants of mathematics" together: \[e^{i\pi}-1=0\] The "-" should be a "+" This identity is trivial to derive from the Euler formula, because: \[e^{i\pi}=cos(\pi)+i sin(\pi)=1\] And this "=1" should be "=-1" Is it a deliberate mistake to provoke engagement? Or have I got that completely wrong?