List questions from alternative-proof

Published on 12 Apr 2026 - 23:27

291

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Any open neighborhood of a boundary point contains an interior point and an exterior point.

Published on 15 Apr 2026 - 20:15

181

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Are there other proofs of Fermat's theorem other than Wiles?

Published on 13 Apr 2026 - 21:24

2.2k

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Alternative proof for continuity of matrix inversion

Published on 11 Apr 2026 - 12:00

1.3k

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A characterization of 'orthogonal' matrices

Published on 09 Apr 2026 - 23:26

45

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Proof Verification/Help: Convergence of sequence

Published on 17 Apr 2026 - 12:14

70

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Proof Help: Showing Divergence and Convergence

Published on 12 Apr 2026 - 11:40

131

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A line that goes through the orthocenter and parallel to one side of the triangle

Published on 14 Apr 2026 - 23:55

99

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Prove linear independence of functions $1,x,x^2,...,x^n$

Published on 15 Apr 2026 - 3:16

227

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Evaluate $\int_0^1\frac{\sin (\pi xs)\sin\left(\pi x (1-s) \right)}{\sin(\pi s)}\,ds$

Published on 17 Apr 2026 - 12:18

43

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Proof verification on invertible matrices

Published on 13 Apr 2026 - 7:06

709

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Verifying the uniqueness of product measure without Hahn-Kolmogorov Theorem.

Published on 12 Apr 2026 - 3:05

36

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solving polynomial equation (showing non-negativity)

Published on 26 Mar 2026 - 1:07

294

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Is there a purely syntactic proof of modus ponens with tableau?

Published on 11 Apr 2026 - 16:19

63

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Let $f : X \to Y$ be surjective. Show that there exists an injection $h : Y \to X$ such that $f \circ h = Id_Y$

Published on 29 Apr 2026 - 12:51

List Question

System of $m$ homogeneous equations in $n$ unknowns

Any open neighborhood of a boundary point contains an interior point and an exterior point.

Are there other proofs of Fermat's theorem other than Wiles?

Alternative proof for continuity of matrix inversion

A characterization of 'orthogonal' matrices

Proof Verification/Help: Convergence of sequence

Proof Help: Showing Divergence and Convergence

A line that goes through the orthocenter and parallel to one side of the triangle

Prove linear independence of functions $1,x,x^2,...,x^n$

Evaluate $\int_0^1\frac{\sin (\pi xs)\sin\left(\pi x (1-s) \right)}{\sin(\pi s)}\,ds$

Proof verification on invertible matrices

Verifying the uniqueness of product measure without Hahn-Kolmogorov Theorem.

solving polynomial equation (showing non-negativity)

Is there a purely syntactic proof of modus ponens with tableau?

Let $f : X \to Y$ be surjective. Show that there exists an injection $h : Y \to X$ such that $f \circ h = Id_Y$

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