List questions from fake-proofs | MathQa

I've formulated a proof, but also a counterexample?

Published on 12 Jan 2025 - 23:32

What have I done wrong in this summation formula?

Published on 12 Jan 2025 - 23:35

What are some false proofs for true or false statements where the error in the proof is not obvious?

Published on 12 Jan 2025 - 19:19

Prove that if 2 divides $x^2-5$ then 4 divides $x^2-5$

Published on 12 Jan 2025 - 8:44

$2=1$ Paradoxes repository

Published on 12 Jan 2025 - 19:10

$\lim\limits_{(x,y) \to (0,0)} \frac{{x{y^2}}}{{{x^2} + {y^4}}} = 0$ prove by polar coordinates.

Published on 12 Jan 2025 - 23:38

Do $L^{2}$ energy estimates implies $H^{k}$ weak solutions?

Published on 12 Jan 2025 - 23:39

Is there a way to prove this wrong?

Published on 12 Jan 2025 - 23:34

What is wrong with the following proof that tries to prove that $2=1$?

Published on 04 Jan 2025 - 18:27

Math: amounts and a proof about amounts

Published on 30 Dec 2024 - 23:25