Question

Is it possible to get less variables after Lagrange's method for quadratic form?

score 39 · Answer 1 · 2019-10-14 22:51:22

39

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Is it possible to get less variables after Lagrange's method for quadratic form?

Published on 14 Oct 2019 - 22:51

score 231 · Answer 2 · 2019-10-16 15:05:27

231

Views

Prove that if $\sum_{i=1}^n x_i=0$ and $\sum_{i=1}^n x_i^2=1$ there exist $i,j$ such that $x_ix_j\leq -{1\over n}$

Published on 16 Oct 2019 - 15:05

score 30 · Answer 3 · 2019-10-18 19:30:49

30

Views

Reduction of quadratic form and geometric interpretation

Published on 18 Oct 2019 - 19:30

score 426 · Answer 4 · 2019-10-19 01:38:53

426

Views

Transformation of Quadratic Surface with a matrix

Published on 19 Oct 2019 - 1:38

score 1.4k · Answer 5 · 2019-10-19 03:43:42

1.4k

Views

What are the bounds on $x^TAx$ when the matrix $A$ has complex eigenvalues with positive real parts?

Published on 19 Oct 2019 - 3:43

score 64 · Answer 6 · 2019-10-19 11:24:38

64

Views

Unit in $\mathbb Q (\sqrt{2})$ with $1 < \epsilon < 1 + \sqrt{2}$

Published on 19 Oct 2019 - 11:24

score 697 · Answer 7 · 2019-10-20 14:30:04

697

Views

Find the range of $y=\sqrt {x^2+2x+3}$

Published on 20 Oct 2019 - 14:30

score 97 · Answer 8 · 2019-10-21 21:27:17

97

Views

Forms of the quadratic equation

Published on 21 Oct 2019 - 21:27

score 1.1k · Answer 9 · 2026-03-25 06:05:16

1.1k

Views

Gradient of $f(x)=(a^T x)(b^T x)$

Published on 25 Mar 2026 - 6:05

score 45 · Answer 10 · 2026-02-23 01:20:32

45

Views

Intersection of isometric subspaces in a space over a finite field

Published on 23 Feb 2026 - 1:20

score 322 · Answer 11 · 2019-10-23 21:07:47

322

Views

How are the discriminant of a single variable quadratic equation and that of a binary quadratic form related?

Published on 23 Oct 2019 - 21:07

score 117 · Answer 12 · 2019-10-23 23:42:50

117

Views

Diagonal representation of quadratic form to evaluate min. and max. values

Published on 23 Oct 2019 - 23:42

score 284 · Answer 13 · 2019-10-24 08:41:20

284

Views

Norm of ideals is multiplicative

Published on 24 Oct 2019 - 8:41

score 66 · Answer 14 · 2019-10-24 09:00:13

66

Views

Prime ideal $42 = (1+\sqrt{-41})(1-\sqrt{-41})$

Published on 24 Oct 2019 - 9:00

score 252 · Answer 15 · 2019-10-28 00:35:23

252

Views

Is there an anisotropic universal quadratic form over rational numbers?

Published on 28 Oct 2019 - 0:35

List Question

Is it possible to get less variables after Lagrange's method for quadratic form?

Prove that if $\sum_{i=1}^n x_i=0$ and $\sum_{i=1}^n x_i^2=1$ there exist $i,j$ such that $x_ix_j\leq -{1\over n}$

Reduction of quadratic form and geometric interpretation

Transformation of Quadratic Surface with a matrix

What are the bounds on $x^TAx$ when the matrix $A$ has complex eigenvalues with positive real parts?

Unit in $\mathbb Q (\sqrt{2})$ with $1 < \epsilon < 1 + \sqrt{2}$

Find the range of $y=\sqrt {x^2+2x+3}$

Forms of the quadratic equation

Gradient of $f(x)=(a^T x)(b^T x)$

Intersection of isometric subspaces in a space over a finite field

How are the discriminant of a single variable quadratic equation and that of a binary quadratic form related?

Diagonal representation of quadratic form to evaluate min. and max. values

Norm of ideals is multiplicative

Prime ideal $42 = (1+\sqrt{-41})(1-\sqrt{-41})$

Is there an anisotropic universal quadratic form over rational numbers?

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