List questions from proof-explanation

Published on 11 Apr 2026 - 8:53

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problem understanding Systems of distinct representatives

Published on 11 Apr 2026 - 8:16

109

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Theorem 3.40 of Rotman's Homological Algebra

Published on 12 Apr 2026 - 7:36

416

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Proof of consistency of propositional logic

Published on 26 Mar 2026 - 4:51

221

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Use of induction in a proof of the Five Colour Theorem

Published on 17 Apr 2026 - 12:39

449

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Proof that the shape operator is a self adjoint application

Published on 10 Apr 2026 - 13:27

39

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Explanation of $E(\eta)=\int_0^{1}\min\left(\xi,\frac23\right)p(\xi)\,d\xi=\int_0^{2/3}\xi\,p(\xi)\,d\xi+\int_{2/3}^1\frac23\,p(\xi)\,d\xi.$

Published on 14 Apr 2026 - 9:21

44

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Why is $x$ divided by $n$ the same as $1$ divided by $n$ times $x$?

Published on 15 Apr 2026 - 0:32

160

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Difficulties in understanding Cassels' proof of the weak Mordell-Weil theorem

Published on 09 Apr 2026 - 22:13

178

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Trouble Proving Cyclotomic Polynomial Identity

Published on 12 Apr 2026 - 18:47

89

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Unclear step ($T \wedge n = T$ a.s) in Doob's optional sampling theorem for discrete martingales

Published on 15 Apr 2026 - 17:13

71

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The axiom quotient and any property of a group.

Published on 26 Mar 2026 - 4:38

38

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Need help understanding the use of exponential function in this context

Published on 09 Apr 2026 - 20:46

78

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Prove that $g''(x) = -g(x)$

Published on 16 Apr 2026 - 12:01

68

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Need help on answering proof question on polynomials p1,p2 of degree

Published on 09 Apr 2026 - 17:18

List Question

Understanding the last step in a solution.

problem understanding Systems of distinct representatives

Theorem 3.40 of Rotman's Homological Algebra

Proof of consistency of propositional logic

Use of induction in a proof of the Five Colour Theorem

Proof that the shape operator is a self adjoint application

Explanation of $E(\eta)=\int_0^{1}\min\left(\xi,\frac23\right)p(\xi)\,d\xi=\int_0^{2/3}\xi\,p(\xi)\,d\xi+\int_{2/3}^1\frac23\,p(\xi)\,d\xi.$

Why is $x$ divided by $n$ the same as $1$ divided by $n$ times $x$?

Difficulties in understanding Cassels' proof of the weak Mordell-Weil theorem

Trouble Proving Cyclotomic Polynomial Identity

Unclear step ($T \wedge n = T$ a.s) in Doob's optional sampling theorem for discrete martingales

The axiom quotient and any property of a group.

Need help understanding the use of exponential function in this context

Prove that $g''(x) = -g(x)$

Need help on answering proof question on polynomials p1,p2 of degree

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