List questions from fake-proofs

Published on 11 Apr 2026 - 17:06

138

Views

Difficutly recognising flaw in putative theorem

Published on 12 Apr 2026 - 23:18

170

Views

Does $\sqrt{-1\cdot-1}=1$ or $-1$?

Published on 16 Apr 2026 - 8:07

84

Views

Error in the derivative proof

Published on 10 May 2026 - 17:27

63

Views

What's wrong with my proof of quotient rings?

Published on 11 Apr 2026 - 6:07

360

Views

Hint for proving $\text{Var}\left(\frac{1}{n}\sum_{i=1}^{n}X_i\right)=ρσ^2+\frac{1-ρ}{n}σ^2$

Published on 16 Apr 2026 - 9:04

855

Views

Careless Mathematical Induction Fallacy

Published on 14 Apr 2026 - 13:48

215

Views

Cohomology of free groups topologically

Published on 16 Apr 2026 - 7:45

99

Views

False proof that $\langle\chi,1_G\rangle$ need not be an integer.

Published on 10 May 2026 - 18:42

416

Views

Fermat's last theorem short proof attempt

Published on 13 Apr 2026 - 21:01

61

Views

Incorrect derivation of geometric series

Published on 13 Apr 2026 - 2:04

741

Views

Why does weak-$L^2$ convergence not imply pointwise convergence for continuous functions?

Published on 14 Apr 2026 - 7:17

289

Views

Why do we need the commutative axiom of multiplication?

Published on 13 Apr 2026 - 8:36

48

Views

Show $x_1,...,x_n>0\wedge x_1\cdot...\cdot x_n=1\Rightarrow \sum x_n \geq n$

Published on 16 Apr 2026 - 12:47

130

Views

Why is independent condition needed in $Pr(X=Y)=0$

Published on 16 Apr 2026 - 1:41

List Question

Help in finding the fallacy in the following proof.

Difficutly recognising flaw in putative theorem

Does $\sqrt{-1\cdot-1}=1$ or $-1$?

Error in the derivative proof

What's wrong with my proof of quotient rings?

Hint for proving $\text{Var}\left(\frac{1}{n}\sum_{i=1}^{n}X_i\right)=ρσ^2+\frac{1-ρ}{n}σ^2$

Careless Mathematical Induction Fallacy

Cohomology of free groups topologically

False proof that $\langle\chi,1_G\rangle$ need not be an integer.

Fermat's last theorem short proof attempt

Incorrect derivation of geometric series

Why does weak-$L^2$ convergence not imply pointwise convergence for continuous functions?

Why do we need the commutative axiom of multiplication?

Show $x_1,...,x_n>0\wedge x_1\cdot...\cdot x_n=1\Rightarrow \sum x_n \geq n$

Why is independent condition needed in $Pr(X=Y)=0$

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