List questions from quadratic-forms

Published on 26 Mar 2026 - 17:13

72

Views

On $Z (X) = \text{trace}((X^TA_1X)^{-1}X^TA_2X)$

Published on 26 Aug 2019 - 4:26

1k

Views

What is the signature of this bilinear form? $e_i\cdot e_j=1-\delta_{ij}$

Published on 25 Mar 2026 - 13:56

443

Views

Gauss on Quadratic Forms

Published on 01 Sep 2019 - 20:17

220

Views

Equivalent definitions of quadratic form

Published on 25 Mar 2026 - 13:53

165

Views

Uniqueness of maximum involving some quadratic functions

Published on 04 Sep 2019 - 9:00

217

Views

Gradient of $a'Xa$ not equal to $2Xa$

Published on 04 Sep 2019 - 12:28

64

Views

Meaning of pseudo-discriminant of a quadratic form

Published on 11 Sep 2019 - 9:16

252

Views

Exercise about finding when a quadratic form has isotropic vectors and then finding them.

Published on 11 Sep 2019 - 21:28

140

Views

Finding the partial derivative of $\frac{\partial}{\partial x_i} (\mathbb{x}^T\mathbb{A}\mathbb{x})$

Published on 12 Sep 2019 - 14:11

146

Views

Isotropy of ternary quadratic forms over global fields

Published on 12 Sep 2019 - 17:04

216

Views

For a Lie algebra $L$ with a quadratic form, is there always a bivector representation $\rho:L\to Cl(V,q)$ making $L$ isomorphic to vectors in $V$?

Published on 25 Mar 2026 - 1:40

1k

Views

Reduce conic sections to standard form

Published on 15 Sep 2019 - 9:13

200

Views

Convexity of "perturbed" convex function

Published on 26 Mar 2026 - 12:44

886

Views

variance of quadratic forms when the random variables are not normally distributed

Published on 20 Sep 2019 - 10:56

List Question

Show that the set {$v: v^{T}A v \le 1$} is bounded iff $A$ is a positive definite matrix

On $Z (X) = \text{trace}((X^TA_1X)^{-1}X^TA_2X)$

What is the signature of this bilinear form? $e_i\cdot e_j=1-\delta_{ij}$

Gauss on Quadratic Forms

Equivalent definitions of quadratic form

Uniqueness of maximum involving some quadratic functions

Gradient of $a'Xa$ not equal to $2Xa$

Meaning of pseudo-discriminant of a quadratic form

Exercise about finding when a quadratic form has isotropic vectors and then finding them.

Finding the partial derivative of $\frac{\partial}{\partial x_i} (\mathbb{x}^T\mathbb{A}\mathbb{x})$

Isotropy of ternary quadratic forms over global fields

For a Lie algebra $L$ with a quadratic form, is there always a bivector representation $\rho:L\to Cl(V,q)$ making $L$ isomorphic to vectors in $V$?

Reduce conic sections to standard form

Convexity of "perturbed" convex function

variance of quadratic forms when the random variables are not normally distributed

Trending Questions

Popular # Hahtags

Popular Questions