Why is this proof false? (Why is $e^i \neq 1$?)
19628
What is wrong with this fake proof $e^i = 1$?
94077
Proof of linear independence of $e^{at}$
103501
Question about a normal equation proof
101792
By expanding $e^x$ into a series prove the following inequality
138054
Proving that $\int_0^1 f(x)e^{nx}\,{\rm d}x = 0$ for all $n\in\mathbb{N}_0$ implies $f(x) = 0$
131424
which of the following is NOT a possible value of $(e^{f})''(0)$??
82097
If $A \succeq B$, is it true that $B^{-1} \succeq A^{-1}$?
85311
Proving that $e^{\pi}-{\pi}^e\lt 1$ without using a calculator
18201
Why isn't the derivative of $e^x$ equal to $xe^{(x-1)}$?
119436
Proving $2^n\leq 2^{n+1}-2^{n-1}-1$ for all $n\geq 1$ by induction
5526
Prove that $ℤ[i]^*= \{1,-1,i,-i\}$
39908
Finding the error in this proof that 1=2
100399
A doubt with a part of a certain proof.
83778
An incorrect proof by exhaustion
90896
proof of inequality $e^x\le x+e^{x^2}$
95145
Does $\exp(2ir\pi)$ equal $1$? What's wrong?
108633
Why $f^{-1}(f(A)) \not= A$