List questions from proof-verification

Published on 11 Apr 2026 - 20:28

103

Views

Show that $I=(−\infty,\sup I]$ as $I$ is bounded above but not bounded below

Published on 14 Apr 2026 - 3:21

218

Views

A single set of moves $S$ that, if repeated, solves the Rubik's cube from any state

Published on 13 Apr 2026 - 2:06

99

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Proof verification there exist at most one $c\in[0,1]$ such that $f(c)=c$.

Published on 13 Apr 2026 - 22:18

141

Views

Trisecting an angle $\theta$ equally via applying trigonometry

Published on 11 Apr 2026 - 0:49

88

Views

Completeness of a specific Hilbert space

Published on 12 Apr 2026 - 22:42

504

Views

Showing a 1-form on the sphere $S^2$ can not be obtained from exterior derivative

Published on 14 Apr 2026 - 22:33

87

Views

Fundamental Theorem of Calculus improper integral question

Published on 09 Apr 2026 - 2:21

66

Views

Variance of Product of Ind. Variables

Published on 15 Apr 2026 - 20:04

4.2k

Views

Proof Verification: A monotonically increasing sequence that is bounded above always has a LUB

Published on 14 Apr 2026 - 5:16

30

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Determine the veracity of the inequality

Published on 15 Apr 2026 - 7:59

133

Views

Using the Multivariable Chain Rule to Show a Solution to a PDE

Published on 23 Apr 2026 - 15:39

656

Views

Is the image of a matrix Lie group under a Lie homomorphism again a Lie group?

Published on 14 Apr 2026 - 3:58

2k

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Prove that for all $a,b \in\mathbb{R}$, $a·b=0$ if and only if $a=0$ or $b=0$.

Published on 17 Apr 2026 - 11:55

59

Views

Is my $\varepsilon-\delta$ proof correct?

Published on 13 Apr 2026 - 2:27

List Question

Proving a limit converges to -3 using definition of convergence.

Show that $I=(−\infty,\sup I]$ as $I$ is bounded above but not bounded below

A single set of moves $S$ that, if repeated, solves the Rubik's cube from any state

Proof verification there exist at most one $c\in[0,1]$ such that $f(c)=c$.

Trisecting an angle $\theta$ equally via applying trigonometry

Completeness of a specific Hilbert space

Showing a 1-form on the sphere $S^2$ can not be obtained from exterior derivative

Fundamental Theorem of Calculus improper integral question

Variance of Product of Ind. Variables

Proof Verification: A monotonically increasing sequence that is bounded above always has a LUB

Determine the veracity of the inequality

Using the Multivariable Chain Rule to Show a Solution to a PDE

Is the image of a matrix Lie group under a Lie homomorphism again a Lie group?

Prove that for all $a,b \in\mathbb{R}$, $a·b=0$ if and only if $a=0$ or $b=0$.

Is my $\varepsilon-\delta$ proof correct?

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