List questions from quadratic-forms

Published on 02 Mar 2021 - 16:23

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Partial derivatives of $|Ax - b|^2$?

Published on 26 Mar 2026 - 7:38

76

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when quadratic form restricted to tangent plane of surface is degenerate

Published on 04 Mar 2021 - 22:13

230

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Proof check: Using Hanson-Wright inequality to concentrate a quadratic form $y^\top A y$ where both $y$ and $A$ are random but independent

Published on 25 Mar 2026 - 19:06

70

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Can this be an onto function?

Published on 05 Mar 2021 - 15:26

256

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If $x^{T}A^{T}Ax = x^Tx$ holds for every $x$, then $A^{T} A = I_n$

Published on 06 Mar 2021 - 5:45

95

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Is every quadratic form in characteristic $2$ induced by a bilinear form?

Published on 07 Mar 2021 - 9:54

134

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Quadratic forms and polarization

Published on 09 Mar 2021 - 18:32

36

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A quadratic form with operations from different fields?

Published on 13 Mar 2021 - 5:26

422

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Gradient of a quadratic form with respect to a complex vector

Published on 26 Mar 2026 - 7:33

109

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Find Critical Points of a Quadratic Form

Published on 15 Mar 2021 - 21:11

91

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Quadratic form problem optimization

Published on 01 Apr 2026 - 0:05

34

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Stationary point of $ x \mapsto \frac{1}{2} \| A x - b \|^2 + \frac{\lambda}{2} \| D x \|^2 $

Published on 23 Feb 2026 - 12:54

49

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Solving a fractional programming problem with square root of quadratic function in denominator

Published on 18 Mar 2021 - 9:50

153

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Diagonalizable binary matrices over $\mathbb{Z}_4$

Published on 24 Feb 2026 - 1:55

List Question

Rational solutions of quadratic forms

Partial derivatives of $|Ax - b|^2$?

when quadratic form restricted to tangent plane of surface is degenerate

Proof check: Using Hanson-Wright inequality to concentrate a quadratic form $y^\top A y$ where both $y$ and $A$ are random but independent

Can this be an onto function?

If $x^{T}A^{T}Ax = x^Tx$ holds for every $x$, then $A^{T} A = I_n$

Is every quadratic form in characteristic $2$ induced by a bilinear form?

Quadratic forms and polarization

A quadratic form with operations from different fields?

Gradient of a quadratic form with respect to a complex vector

Find Critical Points of a Quadratic Form

Quadratic form problem optimization

Stationary point of $ x \mapsto \frac{1}{2} \| A x - b \|^2 + \frac{\lambda}{2} \| D x \|^2 $

Solving a fractional programming problem with square root of quadratic function in denominator

Diagonalizable binary matrices over $\mathbb{Z}_4$

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