List questions from proof-explanation

Published on 13 Apr 2026 - 12:29

74

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Verify and understand Proof of Path connected implies connected

Published on 27 Mar 2026 - 3:49

45

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Help understanding Proof of the equality of the normal and the extended integrals

Published on 13 Apr 2026 - 3:40

995

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Is it right to ignore the negative result in the derivation of the inverse hyperbolic cosine function?

Published on 11 Apr 2026 - 14:44

457

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On the proof of the density theorem

Published on 26 Mar 2026 - 4:52

1k

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How to prove that a sequence is Cauchy

Published on 10 Apr 2026 - 4:08

72

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Is this proof valid?

Published on 09 Apr 2026 - 7:40

29

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Characterization of Gaussian numbers, proof explanation

Published on 10 May 2026 - 17:13

175

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Prove that $ a_{1}^{3}+a_{2}^{3}+\cdots+a_{l}^{3}=\left(a_{1}+a_{2}+\cdots+a_{l}\right)^{2} $

Published on 15 Apr 2026 - 8:34

754

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Prove that $\int f\ d\lambda = \int_{a}^{b} f(x)\ dx,$ for any $f \in \mathcal R[a,b].$

Published on 16 Apr 2026 - 9:06

49

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Proof with Induction for Matrix

Published on 12 Apr 2026 - 9:43

98

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A detail in the proof of the Yoneda lemma

Published on 26 Mar 2026 - 19:20

107

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Help understanding $1+2+3+\dots+n$, proof

Published on 10 Apr 2026 - 20:42

325

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Proof that the set of all prime numbers is not open

Published on 12 Apr 2026 - 3:10

92

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closed formula for the function

Published on 09 Apr 2026 - 5:17

List Question

Rudin Theorem 1:11: understanding why $L \subset S$

Verify and understand Proof of Path connected implies connected

Help understanding Proof of the equality of the normal and the extended integrals

Is it right to ignore the negative result in the derivation of the inverse hyperbolic cosine function?

On the proof of the density theorem

How to prove that a sequence is Cauchy

Is this proof valid?

Characterization of Gaussian numbers, proof explanation

Prove that $ a_{1}^{3}+a_{2}^{3}+\cdots+a_{l}^{3}=\left(a_{1}+a_{2}+\cdots+a_{l}\right)^{2} $

Prove that $\int f\ d\lambda = \int_{a}^{b} f(x)\ dx,$ for any $f \in \mathcal R[a,b].$

Proof with Induction for Matrix

A detail in the proof of the Yoneda lemma

Help understanding $1+2+3+\dots+n$, proof

Proof that the set of all prime numbers is not open

closed formula for the function

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