List questions from proof-explanation

Published on 04 May 2020 - 9:06

54

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Lemma zero vector: Kreyszig

Published on 15 Apr 2026 - 20:36

2.4k

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Understanding Epsilon-Delta Proof

Published on 13 Apr 2026 - 4:09

316

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Rudin: set of $n$ tuples are countable

Published on 14 Apr 2026 - 5:43

136

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Understanding the proof for subsequences of convergent sequences converge to the same limit as the original sequence

Published on 12 Apr 2026 - 0:31

47

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8.40 proof Axler: How to understand

Published on 11 Apr 2026 - 20:15

133

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Solving $x^3+y^3+z^3= 2014^{2012}$ over the integers.

Published on 17 Apr 2026 - 0:47

717

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Specific question about the proof Law of total expectation

Published on 09 Apr 2026 - 10:59

55

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$F: \mathcal{C} \to \mathcal{D}$ equivalence of categories + $\mathcal{C}$ complete implies $\mathcal{D}$ complete.

Published on 26 Mar 2026 - 4:51

71

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Proof that any $z \in \mathbb{C}$ can be written as $re^{i \theta}$

Published on 12 Apr 2026 - 2:43

59

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Proof of proposition 9.12 in Axler

Published on 10 Apr 2026 - 19:50

377

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Explanation of branch-and-cut method in solving MIP.

Published on 25 Mar 2026 - 23:36

169

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Detail from proof of Sylow's Theorem from Herstein

Published on 09 Apr 2026 - 20:25

497

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Prove that if A and B are denumerable disjoint sets, then $A∪B$ is denumerable.

Published on 17 Apr 2026 - 6:16

43

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Understanding the proof if $f$ is continuous on $A \subset \mathbb{R}$ and $K \subseteq A$ is compact then $f(K)$ is compact

Published on 17 Apr 2026 - 14:59

List Question

Why does this Olympiad inequality proving technique (Isolated Fudging) work?

Lemma zero vector: Kreyszig

Understanding Epsilon-Delta Proof

Rudin: set of $n$ tuples are countable

Understanding the proof for subsequences of convergent sequences converge to the same limit as the original sequence

8.40 proof Axler: How to understand

Solving $x^3+y^3+z^3= 2014^{2012}$ over the integers.

Specific question about the proof Law of total expectation

$F: \mathcal{C} \to \mathcal{D}$ equivalence of categories + $\mathcal{C}$ complete implies $\mathcal{D}$ complete.

Proof that any $z \in \mathbb{C}$ can be written as $re^{i \theta}$

Proof of proposition 9.12 in Axler

Explanation of branch-and-cut method in solving MIP.

Detail from proof of Sylow's Theorem from Herstein

Prove that if A and B are denumerable disjoint sets, then $A∪B$ is denumerable.

Understanding the proof if $f$ is continuous on $A \subset \mathbb{R}$ and $K \subseteq A$ is compact then $f(K)$ is compact

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