Question

Galois Descent for representations of finite groups OR a question about block matrices where the blocks are Galois conjugates

score 275 · Answer 1 · 2026-05-10 23:08:22

275

Views

Galois Descent for representations of finite groups OR a question about block matrices where the blocks are Galois conjugates

Published on 10 May 2026 - 23:08

score 1.1k · Answer 2 · 2026-04-14 05:30:53

1.1k

Views

Finding orthogonal vector with complex coefficients

Published on 14 Apr 2026 - 5:30

score 56 · Answer 3 · 2026-04-09 13:30:44

56

Views

Proof of a statement regarding osculating spaces

Published on 09 Apr 2026 - 13:30

score 2.1k · Answer 4 · 2026-05-10 20:43:58

2.1k

Views

Prove that $-1$ is an eigenvalue of an orthogonal matrix $A \in M_{4 \times 4} (\Bbb R)$ with $\det(A)=-1$

Published on 10 May 2026 - 20:43

score 77 · Answer 5 · 2026-04-15 13:49:32

77

Views

Is there an open ball around the $0$ matrix such that the eigenvalues contains a cube?

Published on 15 Apr 2026 - 13:49

score 105 · Answer 6 · 2026-05-11 05:39:29

105

Views

What is the eigenvalue perturbation if a row-column pair is changed?

Published on 11 May 2026 - 5:39

score 247 · Answer 7 · 2026-05-11 03:12:04

247

Views

Is there a trick to invert $I+ABA$ given a spectral decomposition of $A$ and $B$?

Published on 11 May 2026 - 3:12

score 8.2k · Answer 8 · 2026-04-10 23:48:56

8.2k

Views

How to find the orthogonal complement of a given subspace?

Published on 10 Apr 2026 - 23:48

score 218 · Answer 9 · 2026-04-16 22:28:42

218

Views

Alternative scalar product for vectors

Published on 16 Apr 2026 - 22:28

score 98 · Answer 10 · 2026-04-14 14:18:41

98

Views

Specific isomorphism of $\mathbb{R}^2$ as an $\mathbb{R}[X]$-module

Published on 14 Apr 2026 - 14:18

score 94 · Answer 11 · 2026-05-15 10:40:38

94

Views

Finding the determinant of a $4\times4$ matrix using row reduction.

Published on 15 May 2026 - 10:40

score 115 · Answer 12 · 2026-04-14 04:17:29

115

Views

Do roots of a monic polynomial contain an open cube?

Published on 14 Apr 2026 - 4:17

score 42 · Answer 13 · 2026-05-10 14:04:51

42

Views

Clustering algorithm to group linear equation into groups to achieve certain conditions

Published on 10 May 2026 - 14:04

score 169 · Answer 14 · 2026-05-11 02:42:56

169

Views

Prove that the matrix $[\Gamma(\lambda_{i}+\mu_{j})]$ is nonsingular.

Published on 11 May 2026 - 2:42

score 80 · Answer 15 · 2026-04-11 13:22:20

80

Views

Retroreflectors in higher dimensions?

Published on 11 Apr 2026 - 13:22

List Question

Galois Descent for representations of finite groups OR a question about block matrices where the blocks are Galois conjugates

Finding orthogonal vector with complex coefficients

Proof of a statement regarding osculating spaces

Prove that $-1$ is an eigenvalue of an orthogonal matrix $A \in M_{4 \times 4} (\Bbb R)$ with $\det(A)=-1$

Is there an open ball around the $0$ matrix such that the eigenvalues contains a cube?

What is the eigenvalue perturbation if a row-column pair is changed?

Is there a trick to invert $I+ABA$ given a spectral decomposition of $A$ and $B$?

How to find the orthogonal complement of a given subspace?

Alternative scalar product for vectors

Specific isomorphism of $\mathbb{R}^2$ as an $\mathbb{R}[X]$-module

Finding the determinant of a $4\times4$ matrix using row reduction.

Do roots of a monic polynomial contain an open cube?

Clustering algorithm to group linear equation into groups to achieve certain conditions

Prove that the matrix $[\Gamma(\lambda_{i}+\mu_{j})]$ is nonsingular.

Retroreflectors in higher dimensions?

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