List questions from alternative-proof

Published on 08 Jul 2017 - 12:05

4.1k

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How to prove divisibility of 11 by basic algebra? (Without modal arithmetic or proof by induction)

Published on 09 Jul 2017 - 4:40

1.3k

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15 Puzzle question - trying to understand reasoning here

Published on 11 Jul 2017 - 6:28

70

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$\mathbb Z[i]/\langle17\rangle$ is a field

Published on 11 Apr 2026 - 10:06

1.2k

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What is the rigorous geometric proof that the projection onto a line gives the minimum least squares error?

Published on 17 Jul 2017 - 3:53

21

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The proof for the Quadrature of a Trapeziod

Published on 08 Apr 2026 - 0:46

148

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Knapsack problem approximation algorithm

Published on 10 Apr 2026 - 18:03

412

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Galois extension characterization

Published on 21 Jul 2017 - 21:49

4.4k

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Compilation of proofs for the summation of natural squares and cubes

Published on 24 Jul 2017 - 16:46

132

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About the irreducibility and separability of a polynomial

Published on 11 Apr 2026 - 21:30

75

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Proof using ONLY Group Theoretic Techniques

Published on 02 Apr 2026 - 3:41

330

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If $\mathbb K:\mathbb F$ is Galois, then it is normal and separable

Published on 26 Jul 2017 - 23:47

230

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Vandermonde's identity induction

Published on 12 Apr 2026 - 6:42

113

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Insightful alternative proof that the average of sample variances of a set equals its overall sample variance (definition inside)

Published on 12 Apr 2026 - 0:42

84

Views

Proof by Contradiction Method involving Intervals

Published on 10 Apr 2026 - 19:49

List Question

How to evaluate the improper integral $\int_{0}^{\pi/2} (\frac{\pi}{2} - x)\tan(x)\ dx$

How to prove divisibility of 11 by basic algebra? (Without modal arithmetic or proof by induction)

15 Puzzle question - trying to understand reasoning here

$\mathbb Z[i]/\langle17\rangle$ is a field

What is the rigorous geometric proof that the projection onto a line gives the minimum least squares error?

The proof for the Quadrature of a Trapeziod

Knapsack problem approximation algorithm

Galois extension characterization

Compilation of proofs for the summation of natural squares and cubes

About the irreducibility and separability of a polynomial

Proof using ONLY Group Theoretic Techniques

If $\mathbb K:\mathbb F$ is Galois, then it is normal and separable

Vandermonde's identity induction

Insightful alternative proof that the average of sample variances of a set equals its overall sample variance (definition inside)

Proof by Contradiction Method involving Intervals

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