Question

Given a conic $\mathscr{C}$, find a linear application $F$, that is not an isometry, s.t. $F(\mathscr{C})=\mathscr{C}$

score 91 · Answer 1 · 2026-04-15 07:55:49

91

Views

Given a conic $\mathscr{C}$, find a linear application $F$, that is not an isometry, s.t. $F(\mathscr{C})=\mathscr{C}$

Published on 15 Apr 2026 - 7:55

score 189 · Answer 2 · 2026-04-12 14:04:26

189

Views

How to prove that $\det \left(\begin{array}{cc} 0 & A\\ -B & I \end{array}\right) = \det(AB) $

Published on 12 Apr 2026 - 14:04

score 69 · Answer 3 · 2026-04-12 18:04:51

69

Views

When is the product of a matrix A, a diagonal matrix, and A transpose positive definite?

Published on 12 Apr 2026 - 18:04

score 102 · Answer 4 · 2026-04-15 12:56:54

102

Views

Diagonalizing Normal Matrix using Polar Decomposition of Vandermonde?

Published on 15 Apr 2026 - 12:56

score 17.1k · Answer 5 · 2026-04-16 14:21:05

17.1k

Views

Proof of "every finite dimensional vector space has a finite basis"

Published on 16 Apr 2026 - 14:21

score 26 · Answer 6 · 2026-04-16 06:16:34

26

Views

$\chi_f$ not coprime to $p \in K[X]$ with $p(f)(v) = 0$

Published on 16 Apr 2026 - 6:16

score 145 · Answer 7 · 2026-04-16 04:03:38

145

Views

Linear functional $f$ is a linear combination of $f_1,..., f_r$ if and only if $\cap N_i\subseteq N_f$

Published on 16 Apr 2026 - 4:03

score 2.5k · Answer 8 · 2026-04-13 08:59:43

2.5k

Views

Power method converging towards non-dominant eigenvector

Published on 13 Apr 2026 - 8:59

score 224 · Answer 9 · 2026-04-16 02:49:35

224

Views

Prove Theorem 2.2 for the case that β is infinite, that is, $R(T) = span({T(v) : v ∈ β})$.

Published on 16 Apr 2026 - 2:49

score 354 · Answer 10 · 2026-04-14 02:47:05

354

Views

Rotation of Gyroscopic Sensor, Euler Angles

Published on 14 Apr 2026 - 2:47

score 124 · Answer 11 · 2026-04-10 05:41:14

124

Views

Commutability transformation

Published on 10 Apr 2026 - 5:41

score 540 · Answer 12 · 2026-04-09 23:41:14

540

Views

Relationship between nullspace and column space

Published on 09 Apr 2026 - 23:41

score 84 · Answer 13 · 2026-04-14 08:09:54

84

Views

What do you mean by root(x)?

Published on 14 Apr 2026 - 8:09

score 333 · Answer 14 · 2026-04-13 00:44:56

333

Views

Reconstruction formula and projection of a vector onto a subspace

Published on 13 Apr 2026 - 0:44

score 30 · Answer 15 · 2026-04-08 17:31:14

30

Views

equation of 3d line from system of equation

Published on 08 Apr 2026 - 17:31

List Question

Given a conic $\mathscr{C}$, find a linear application $F$, that is not an isometry, s.t. $F(\mathscr{C})=\mathscr{C}$

How to prove that $\det \left(\begin{array}{cc} 0 & A\\ -B & I \end{array}\right) = \det(AB) $

When is the product of a matrix A, a diagonal matrix, and A transpose positive definite?

Diagonalizing Normal Matrix using Polar Decomposition of Vandermonde?

Proof of "every finite dimensional vector space has a finite basis"

$\chi_f$ not coprime to $p \in K[X]$ with $p(f)(v) = 0$

Linear functional $f$ is a linear combination of $f_1,..., f_r$ if and only if $\cap N_i\subseteq N_f$

Power method converging towards non-dominant eigenvector

Prove Theorem 2.2 for the case that β is infinite, that is, $R(T) = span({T(v) : v ∈ β})$.

Rotation of Gyroscopic Sensor, Euler Angles

Commutability transformation

Relationship between nullspace and column space

What do you mean by root(x)?

Reconstruction formula and projection of a vector onto a subspace

equation of 3d line from system of equation

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