Chris

Member for 5 years, 11 months
Last seen this week

London, UK

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algebra-precalculus

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Questions

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14

Closest cyclotomic integer to a cyclotomic number?

Jun 13, 2018

4

Finite sum $\sum_{k=1}^{p-1} \frac{1-\cos\left(\frac{2\pi k r}{p}\right)}{1-\cos\left(\frac{2\pi k s}{p}\right)}$ for $\gcd(p,rs)=1$.

Apr 18, 2018

4

Unit of the form $n\alpha + m \beta \sqrt{d}$ in real quadratic fields

Sep 25, 2018

4

Linear combination of two vectors in complex space

Jan 12, 2019

4

Expand $\cos^n (x)$ in terms of $\cos{kx}$, $k=1,\dots,n$.

Mar 30, 2017

Answers

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2

For the $4x^3-g_{2}x-g_{3}=0$, why the discriminant it must be of the form $\alpha g_{2}^3+\beta g_{3}^2$?

Jun 14, 2018

2

$2^n-1$ is composite

Jun 14, 2018

1

Calculate the limit of a the following expression

Nov 8, 2022

0

Why $\int_0^\infty x\delta (y-x)dx=y$?

Oct 22, 2018

-1

Sum of digits of a square number.

Jun 17, 2018

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algebra-precalculus

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linear-algebra

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modular-forms

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elementary-number-theory

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limits

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