User blog comment:Sbiis Saibian/Googology101 - Part II/@comment-10429372-20141024190431/@comment-1605058-20141025182204

As for such basics, I actually did understand what complex exponentiation is, how it's defined and why Euler's formula holds. I also figured out why exponential function takes all non-zero values. It's still quite nice description of this, and could be useful for others.