List questions from fake-proofs

Published on 12 Apr 2019 - 8:36

69

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And in this situation can math not work?

Published on 13 Apr 2019 - 16:02

349

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What is wrong with this false proof of $\pi=0$?

Published on 15 Apr 2019 - 13:04

61

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Some matrices are real numbers?

Published on 16 Apr 2019 - 12:20

1.3k

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What is the intersection of an event with itself?

Published on 18 Apr 2019 - 0:58

219

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What's wrong with this proof that $0 = 1$?

Published on 21 Apr 2019 - 22:59

74

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Absurd $L^2\subset H^1$ containment from a compactness proof

Published on 23 Apr 2019 - 22:45

223

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How to find limits for $\theta$ for Gaussian Integrals

Published on 25 Mar 2026 - 11:10

87

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Applying math incorrectly to physics

Published on 30 Apr 2019 - 13:32

154

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Find the mistakes in a "proof" of the 4-colour Theorem

Published on 13 May 2019 - 11:23

759

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What is the relationship between the radical of the Killing form and the radical of a Lie algebra?

Published on 25 Mar 2026 - 10:58

4.7k

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What is wrong with this proof that symmetric matrices commute?

Published on 25 Mar 2026 - 9:24

137

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What's the mistake in $\sin(\frac{a}{2})=\pm\sqrt{\frac{1\pm \cos(a)}{2}}$?

Published on 10 Jun 2019 - 3:31

884

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does ln(-1)=0? What did I do wrong in my proof?

Published on 15 Jun 2019 - 15:19

123

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Prove that $\lim\limits_{n \to\infty}\sqrt[n]{n!}=\infty$

Published on 16 Jun 2019 - 14:59

List Question

Problem with derivative of x^n

And in this situation can math not work?

What is wrong with this false proof of $\pi=0$?

Some matrices are real numbers?

What is the intersection of an event with itself?

What's wrong with this proof that $0 = 1$?

Absurd $L^2\subset H^1$ containment from a compactness proof

How to find limits for $\theta$ for Gaussian Integrals

Applying math incorrectly to physics

Find the mistakes in a "proof" of the 4-colour Theorem

What is the relationship between the radical of the Killing form and the radical of a Lie algebra?

What is wrong with this proof that symmetric matrices commute?

What's the mistake in $\sin(\frac{a}{2})=\pm\sqrt{\frac{1\pm \cos(a)}{2}}$?

does ln(-1)=0? What did I do wrong in my proof?

Prove that $\lim\limits_{n \to\infty}\sqrt[n]{n!}=\infty$

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