List questions from quadratic-forms

Published on 02 Jun 2017 - 5:58

268

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Proving that $\Bigl[\frac{-4+\sqrt{26+20y+4y^2}}{2},\frac{-3+\sqrt{23+20y+4y^2}}{2}\Bigl]$ contains no integer

Published on 23 Feb 2026 - 18:48

69

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How to know what the map does in algebraic number theory?

Published on 07 Jun 2017 - 2:59

80

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What is $\frac{d}{dx} \frac{x^T A x}{x^T B x}$?

Published on 09 Jun 2017 - 8:49

53

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What does it "mean" for two orthogonal vases of a vector space to be continguous?

Published on 11 Jun 2017 - 21:54

364

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How to find such an isotropic space?

Published on 12 Jun 2017 - 6:50

133

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Real quadratic form signature

Published on 29 Mar 2026 - 8:35

39

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Mean of dependent Gaussian random variables in the quadratic from.

Published on 15 Jun 2017 - 16:05

660

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Finding all pairs $(a,b)$ of positive integers such that $a^2+nab+b^2$ is a perfect square.

Published on 16 Jun 2017 - 21:32

186

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Solution to a quadratic Diophantine equation in two variables

Published on 17 Jun 2017 - 18:17

56

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Determining two binary quadratic forms induced by binary nondegenerate symplectic form.

Published on 23 Feb 2026 - 19:17

220

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Proving $\det\bf M\le\det A\det D$ for an n.n.d. block matrix $\mathbf M=\left[\begin{matrix}\bf A & \bf B\\\bf B^\top & \bf D \\\end{matrix}\right]$

Published on 18 Jun 2017 - 15:40

244

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Range in an Interval

Published on 30 Mar 2026 - 15:09

50

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Modeling non symmetric quadric

Published on 21 Jun 2017 - 10:08

129

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Equivalent quadratic form

Published on 25 Jun 2017 - 13:03

List Question

Quadratic form to regular form

Proving that $\Bigl[\frac{-4+\sqrt{26+20y+4y^2}}{2},\frac{-3+\sqrt{23+20y+4y^2}}{2}\Bigl]$ contains no integer

How to know what the map does in algebraic number theory?

What is $\frac{d}{dx} \frac{x^T A x}{x^T B x}$?

What does it "mean" for two orthogonal vases of a vector space to be continguous?

How to find such an isotropic space?

Real quadratic form signature

Mean of dependent Gaussian random variables in the quadratic from.

Finding all pairs $(a,b)$ of positive integers such that $a^2+nab+b^2$ is a perfect square.

Solution to a quadratic Diophantine equation in two variables

Determining two binary quadratic forms induced by binary nondegenerate symplectic form.

Proving $\det\bf M\le\det A\det D$ for an n.n.d. block matrix $\mathbf M=\left[\begin{matrix}\bf A & \bf B\\\bf B^\top & \bf D \\\end{matrix}\right]$

Range in an Interval

Modeling non symmetric quadric

Equivalent quadratic form

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