List questions from quadratic-forms

Published on 29 Oct 2020 - 9:10

29

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Proving a function is a universal quadratic form

Published on 30 Oct 2020 - 22:25

162

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If $x^2+ky^2$ represents $a$ and $ab$ must it also represent $b$?

Published on 28 Feb 2026 - 1:15

187

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Lower bound existence of positive semidefinite quadratic function

Published on 26 Mar 2026 - 9:38

48

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Reference request: Classification of 2-dimensional quadratic forms

Published on 13 Nov 2020 - 9:16

139

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Definiteness of quadratic form by completing the square

Published on 17 Nov 2020 - 7:08

316

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Maximum and Minimum value of Quadratic form

Published on 19 Nov 2020 - 2:46

35

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Subspaces of a quadratic space

Published on 20 Nov 2020 - 1:51

41

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Equivalence of quadratic forms over $\mathbb{C}$

Published on 21 Nov 2020 - 12:31

314

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Solving a constrained optimization problem

Published on 29 Mar 2026 - 18:29

289

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Quadratic form Gauss sum and quadratic residue

Published on 25 Mar 2026 - 19:04

156

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On the existence of solutions to two integer quadratic equations of the same "parity"

Published on 27 Mar 2026 - 0:06

122

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Primes of the form $x^2+31y^2$ and $x^2+xy+8y^2$ and quadratic forms

Published on 26 Nov 2020 - 11:28

77

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A Conway quadratic (form) equation in four variables

Published on 29 Mar 2026 - 17:31

47

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Who were the pioneers using the determinant for antisymmetrization of scalar functions?

Published on 30 Mar 2026 - 10:42

List Question

Quadrics and a theorem of Springer

Proving a function is a universal quadratic form

If $x^2+ky^2$ represents $a$ and $ab$ must it also represent $b$?

Lower bound existence of positive semidefinite quadratic function

Reference request: Classification of 2-dimensional quadratic forms

Definiteness of quadratic form by completing the square

Maximum and Minimum value of Quadratic form

Subspaces of a quadratic space

Equivalence of quadratic forms over $\mathbb{C}$

Solving a constrained optimization problem

Quadratic form Gauss sum and quadratic residue

On the existence of solutions to two integer quadratic equations of the same "parity"

Primes of the form $x^2+31y^2$ and $x^2+xy+8y^2$ and quadratic forms

A Conway quadratic (form) equation in four variables

Who were the pioneers using the determinant for antisymmetrization of scalar functions?

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