Why is this $0 = 1$ proof wrong?
40048
Finding the fallacy in this broken proof
41645
Checking my understanding: $1 - 1 + 1 - 1 + 1 - ... = \frac{1}{2}$
70585
Why does Assuming[x > 0, TrueQ[x > 0]] return False?
107390
Why is (-1)(-1) = 1?
7443
Why is empty product defined to be $1$?
94627
What's wrong with this derivation that $i\hbar = 0$?
95145
Does $\exp(2ir\pi)$ equal $1$? What's wrong?
33705
Is $0$ a natural number?
33402
What is wrong with this funny proof that 2 = 4 using infinite exponentiation?
13899
Proof that $-v = (-1)*v$
80710
Does $\int_{-1}^1 \frac 1 x dx$ equal zero?
80004
Why is $1/i$ equal to $-i$?
155897
Proof by induction - is this correct?
81875
why is $\sqrt{-1} = i$ and not $\pm i$?
12402
Showing a function on $[0,1]$ is the zero function
3433
Proof if $a \vec v = 0$ then $a = 0$ or $\vec v = 0$
30860
Prove that $f(x)=0$ in $[-1,1]$.