Question

Finding a rational (or integral) parametrization for a system of (homogeneous?) quadratic forms?

score 296 · Answer 1 · 2026-03-25 19:04:29

296

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Finding a rational (or integral) parametrization for a system of (homogeneous?) quadratic forms?

Published on 25 Mar 2026 - 19:04

score 105 · Answer 2 · 2023-02-19 17:56:07

105

Views

Is there a general algorithm to decide whether an integer value is attainable by a quadratic form?

Published on 19 Feb 2023 - 17:56

score 65 · Answer 3 · 2026-03-22 07:01:37

65

Views

Find matrix with 0 or 1 that in square gives matrix with of only ones.

Published on 22 Mar 2026 - 7:01

score 67 · Answer 4 · 2026-03-28 05:28:45

67

Views

Eigendecomposition of $A^TD_iA$, with $A$ rectangular and $D_i$ diagonal

Published on 28 Mar 2026 - 5:28

score 83 · Answer 5 · 2026-03-25 07:42:32

83

Views

Groebner basis for system of integral quadratic forms

Published on 25 Mar 2026 - 7:42

score 197 · Answer 6 · 2023-02-28 12:06:21

197

Views

Examples of Witt decomposition

Published on 28 Feb 2023 - 12:06

score 54 · Answer 7 · 2026-03-27 03:46:04

54

Views

Lattice with only isotropic vectors (does not exist)

Published on 27 Mar 2026 - 3:46

score 55 · Answer 8 · 2026-03-29 10:49:01

55

Views

Calculating dot product of fourier amplitude spectra through quadratic form in signal space?

Published on 29 Mar 2026 - 10:49

score 150 · Answer 9 · 2026-03-25 07:47:24

150

Views

Finding integer roots of an integer quadratic form

Published on 25 Mar 2026 - 7:47

score 71 · Answer 10 · 2023-03-03 07:54:44

71

Views

Does the set of points $\{\mathbf{x}|\mathbf{x}=(\mathbf{v}^H\mathbf{R}\mathbf{v})\mathbf{v}\}$ represent a multidimensional ellipse?

Published on 03 Mar 2023 - 7:54

score 418 · Answer 11 · 2026-03-26 04:51:35

418

Views

Geometric interpretation of the Hessian

Published on 26 Mar 2026 - 4:51

score 156 · Answer 12 · 2023-03-08 07:46:41

156

Views

How can one prove that if discriminant of a quadratic function is zero, then it is perfect square?

Published on 08 Mar 2023 - 7:46

score 57 · Answer 13 · 2023-03-10 17:56:23

57

Views

Randomly sampling of points from the intersection of unit n-sphere and n-dimensional Quadratic form

Published on 10 Mar 2023 - 17:56

score 43 · Answer 14 · 2026-03-25 08:05:34

43

Views

Algorithm for the maximal isotropic subspace

Published on 25 Mar 2026 - 8:05

score 79 · Answer 15 · 2026-03-27 03:44:20

79

Views

Orthogonal group of Lorentzian lattice $I_{1, n}$ is infinite for $n\geq 2$

Published on 27 Mar 2026 - 3:44

List Question

Finding a rational (or integral) parametrization for a system of (homogeneous?) quadratic forms?

Is there a general algorithm to decide whether an integer value is attainable by a quadratic form?

Find matrix with 0 or 1 that in square gives matrix with of only ones.

Eigendecomposition of $A^TD_iA$, with $A$ rectangular and $D_i$ diagonal

Groebner basis for system of integral quadratic forms

Examples of Witt decomposition

Lattice with only isotropic vectors (does not exist)

Calculating dot product of fourier amplitude spectra through quadratic form in signal space?

Finding integer roots of an integer quadratic form

Does the set of points $\{\mathbf{x}|\mathbf{x}=(\mathbf{v}^H\mathbf{R}\mathbf{v})\mathbf{v}\}$ represent a multidimensional ellipse?

Geometric interpretation of the Hessian

How can one prove that if discriminant of a quadratic function is zero, then it is perfect square?

Randomly sampling of points from the intersection of unit n-sphere and n-dimensional Quadratic form

Algorithm for the maximal isotropic subspace

Orthogonal group of Lorentzian lattice $I_{1, n}$ is infinite for $n\geq 2$

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