List questions from proof-explanation

Published on 16 Apr 2026 - 7:46

113

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When letting an element be an arbitrary member of a set $A$ do I have to account for $A =\emptyset$?

Published on 16 Apr 2026 - 8:52

148

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Need help understanding a proof (Bipartite Graph)

Published on 10 Apr 2026 - 14:21

89

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Russel's paradox: what is the contradiction with $R \not\in R$?

Published on 14 Apr 2026 - 3:14

254

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Partial sum of bounded series is Cauchy in $C(X, \mathbb{R})$?

Published on 14 Apr 2026 - 0:12

4.4k

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Why does proof by contrapositive make intuitive sense?

Published on 12 Apr 2026 - 8:49

762

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Understanding direct proofs and proofs by cases?

Published on 13 Apr 2026 - 14:43

374

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Proof of the convergence of $\int_0^\infty\sin{(x^4)} dx$ with Riemann-Lebesgue lemma

Published on 16 Apr 2026 - 8:26

39

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how to show the identiy of direct image

Published on 16 Apr 2026 - 10:31

56

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Choosing values in a strong induction

Published on 12 Apr 2026 - 20:48

45

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Explain a statement in a proof

Published on 10 May 2026 - 22:03

1k

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Is $\gcd(a,b) = \gcd(2a,b)$?

Published on 11 Apr 2026 - 19:01

61

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Is it possible for two triangles to be different if the sides of one is equal to another?

Published on 10 Apr 2026 - 20:21

1k

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Intuitive derivation of Taylor expansion?

Published on 12 Apr 2026 - 8:01

40

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Derivation of Taylor expansion with the $a$ term

Published on 13 Apr 2026 - 18:47

List Question

Proving $\sqrt{2}$ is irrational: why $ q = p - \frac{p^2 -2}{p+2}$

When letting an element be an arbitrary member of a set $A$ do I have to account for $A =\emptyset$?

Need help understanding a proof (Bipartite Graph)

Russel's paradox: what is the contradiction with $R \not\in R$?

Partial sum of bounded series is Cauchy in $C(X, \mathbb{R})$?

Why does proof by contrapositive make intuitive sense?

Understanding direct proofs and proofs by cases?

Proof of the convergence of $\int_0^\infty\sin{(x^4)} dx$ with Riemann-Lebesgue lemma

how to show the identiy of direct image

Choosing values in a strong induction

Explain a statement in a proof

Is $\gcd(a,b) = \gcd(2a,b)$?

Is it possible for two triangles to be different if the sides of one is equal to another?

Intuitive derivation of Taylor expansion?

Derivation of Taylor expansion with the $a$ term

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