List questions from fake-proofs

Published on 13 Nov 2016 - 10:13

156

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What is the mistake?

Published on 14 Nov 2016 - 8:42

2.1k

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Let G be a group and suppose $abc=e$ for some $a,b,c \in G$. Then $bca=e$ as well.

Published on 16 Nov 2016 - 8:19

1.9k

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What's wrong with my proof? nZ are the only subgroups of Z

Published on 16 Nov 2016 - 19:49

597

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Are all triangles isosceles?

Published on 27 Mar 2026 - 6:13

233

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$4=5$. Is this possible?

Published on 19 Nov 2016 - 12:16

1.1k

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Why can a = b imply 2 = 1?

Published on 23 Nov 2016 - 1:01

4.4k

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Prove or disprove: All radial vector fields are conservative

Published on 23 Nov 2016 - 2:18

58

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A question on a contradiction by a random variable $X$

Published on 24 Nov 2016 - 0:44

185

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$\phi \ : \ \mathbb{P}^n \rightarrow \mathbb{P}^m$ continuous $\ \Longrightarrow \ \phi$ morphism of algebraic varieties?

Published on 24 Nov 2016 - 9:58

58

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How to prove $a=b$ when $a\neq b$ and $a$ and $b$ are constants using some tricks?

Published on 25 Nov 2016 - 19:33

146

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Where is my mistake ?$ (-1)^3=-1 \to \sqrt[3]{-1}=-1 $

Published on 26 Nov 2016 - 10:44

112

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Is this proof about primes correct?

Published on 29 Nov 2016 - 18:03

84

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Prove or disprove $(a^2+b^2)(b^2+c^2)(c^2+a^2)\leq(a+b)(b+c)(c+a)$

Published on 30 Nov 2016 - 12:49

39

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explain where the error on the statment?

Published on 30 Nov 2016 - 15:39

List Question

Find the flaw in the given proof.

What is the mistake?

Let G be a group and suppose $abc=e$ for some $a,b,c \in G$. Then $bca=e$ as well.

What's wrong with my proof? nZ are the only subgroups of Z

Are all triangles isosceles?

$4=5$. Is this possible?

Why can a = b imply 2 = 1?

Prove or disprove: All radial vector fields are conservative

A question on a contradiction by a random variable $X$

$\phi \ : \ \mathbb{P}^n \rightarrow \mathbb{P}^m$ continuous $\ \Longrightarrow \ \phi$ morphism of algebraic varieties?

How to prove $a=b$ when $a\neq b$ and $a$ and $b$ are constants using some tricks?

Where is my mistake ?$ (-1)^3=-1 \to \sqrt[3]{-1}=-1 $

Is this proof about primes correct?

Prove or disprove $(a^2+b^2)(b^2+c^2)(c^2+a^2)\leq(a+b)(b+c)(c+a)$

explain where the error on the statment?

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