Mistake in this proof of $1=2$.
39908
Finding the error in this proof that 1=2
153226
Proof of $\sum_{k = 1}^{n} \frac{1}{k^{2}} < 2 - \frac{1}{n}$
40532
Seems that I just proved $2=4$.
141909
Prove ${2}^{n}\cdot(2m+1)-1 $ is invertible
150738
Proof of $(A - B) - C = A - (B \cup C)$
83778
An incorrect proof by exhaustion
147528
Where's the error in this $2=1$ fake proof?
110826
prove that : $ i = \sqrt {-1}\ $
135807
I'm having trouble with a proof by induction
55428
Inductive proof of $a_n = 3*2^{n-1} + 2(-1)^n$ if $a_n = a_{n-1} + 2*a_{n-2}, a_1 = 1, a_2 = 8$
61387
Incorrect Solution for Problem 7 of Pinter's Book of Abstract Algebra, Chapter 2?
12857
Induction proof: $S$ contains powers of 2 and predecessors implies $S={\bf N}$
79274
$1=2$ | Continued fraction fallacy
158862
Show that $a(-1) = (-1)a = -a $.
32524
Flawed proof that all positive integers are equal
86567
Understanding $\sum_{x = 0}^y x = \frac{y(y + 1)}{2}$ in a step of a proof
99052
Prove that $( 1 + n^{-2}) ^n \to 1$.