Question

Existence of an isotropic vector orthogonal to a given one in a vector space over a finite field.

score 473 · Answer 1 · 2018-04-05 20:40:23

473

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Existence of an isotropic vector orthogonal to a given one in a vector space over a finite field.

Published on 05 Apr 2018 - 20:40

score 1.2k · Answer 2 · 2018-04-06 17:54:36

1.2k

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Quadratic Form - Finding the Coefficient matrix

Published on 06 Apr 2018 - 17:54

score 65 · Answer 3 · 2018-04-07 16:18:06

65

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Is this quadratic form of any use to rule out ec-numbers to be prime?

Published on 07 Apr 2018 - 16:18

score 65 · Answer 4 · 2018-04-07 17:39:17

Prove that the center of the ellipse $Ax^2+Bxy+Cy^2+Dx+Ey+F=0$, where $A, B, C, D, E>0$, is not in the first quadrant of the $xy$-plane?

score 5.7k · Answer 5 · 2018-04-12 16:02:40

5.7k

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If $x^TAx$ = $x^TBx$ for all $x\in \mathbb R^n$. Then what can I say about the matrices? Are they congruent to each other?

Published on 12 Apr 2018 - 16:02

score 320 · Answer 6 · 2018-04-12 18:15:45

320

Views

On problem regarding the quadratic form $yx+z^2$.

Published on 12 Apr 2018 - 18:15

score 36 · Answer 7 · 2018-04-13 06:28:34

36

Views

Can we say any matrix whose quadratic form is $xy + z^2$ can be diagonalised to a Matrix who has two positive and one negative Eigen value?

Published on 13 Apr 2018 - 6:28

score 219 · Answer 8 · 2018-04-16 14:37:44

219

Views

Maximum of Quadratic form

Published on 16 Apr 2018 - 14:37

score 1.6k · Answer 9 · 2018-04-17 21:25:34

1.6k

Views

Find the extrema of $\sin(x)\cos(y)$ with the Hessian

Published on 17 Apr 2018 - 21:25

score 159 · Answer 10 · 2018-04-18 04:49:44

159

Views

On a statement in The Joy of Factoring By Samuel S. Wagstaff (Jr.)?

Published on 18 Apr 2018 - 4:49

score 63 · Answer 11 · 2018-04-18 20:21:41

63

Views

How to factorize a quadratic expression with an extra constant?

Published on 18 Apr 2018 - 20:21

score 95 · Answer 12 · 2018-04-20 02:05:26

95

Views

Why does $x + x = \dfrac{(-b)}{2a}$ not work fo both of the roots?

Published on 20 Apr 2018 - 2:05

score 394 · Answer 13 · 2018-04-21 12:33:55

394

Views

For what prime $p$ does this quadratic form represent $0$?

Published on 21 Apr 2018 - 12:33

score 48 · Answer 14 · 2018-04-22 04:24:50

48

Views

Determinant-of-Determinants Form equivalent of $\mathbf{ x^T Q x}$

Published on 22 Apr 2018 - 4:24

score 24 · Answer 15 · 2018-04-23 09:10:01

24

Views

Quadratic forms $q_1, ... ,q_d : \mathbb{C}^n \rightarrow \mathbb{C}$ have a common zero if $n \geq 2^d$

Published on 23 Apr 2018 - 9:10

List Question

Existence of an isotropic vector orthogonal to a given one in a vector space over a finite field.

Quadratic Form - Finding the Coefficient matrix

Is this quadratic form of any use to rule out ec-numbers to be prime?

Prove that the center of the ellipse $Ax^2+Bxy+Cy^2+Dx+Ey+F=0$, where $A, B, C, D, E>0$, is not in the first quadrant of the $xy$-plane?

If $x^TAx$ = $x^TBx$ for all $x\in \mathbb R^n$. Then what can I say about the matrices? Are they congruent to each other?

On problem regarding the quadratic form $yx+z^2$.

Can we say any matrix whose quadratic form is $xy + z^2$ can be diagonalised to a Matrix who has two positive and one negative Eigen value?

Maximum of Quadratic form

Find the extrema of $\sin(x)\cos(y)$ with the Hessian

On a statement in The Joy of Factoring By Samuel S. Wagstaff (Jr.)?

How to factorize a quadratic expression with an extra constant?

Why does $x + x = \dfrac{(-b)}{2a}$ not work fo both of the roots?

For what prime $p$ does this quadratic form represent $0$?

Determinant-of-Determinants Form equivalent of $\mathbf{ x^T Q x}$

Quadratic forms $q_1, ... ,q_d : \mathbb{C}^n \rightarrow \mathbb{C}$ have a common zero if $n \geq 2^d$

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