Question

Skew-symmetric matrices and invariants

score 215 · Answer 1 · 2026-04-16 03:19:41

215

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Skew-symmetric matrices and invariants

Published on 16 Apr 2026 - 3:19

score 629 · Answer 2 · 2026-04-15 14:44:01

629

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If a matrix does not have have only the trivial solution, are the columns linearly dependent?

Published on 15 Apr 2026 - 14:44

score 1.9k · Answer 3 · 2026-04-10 12:39:07

1.9k

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Meaning of $x^T A x$

Published on 10 Apr 2026 - 12:39

score 446 · Answer 4 · 2026-04-17 07:10:49

446

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Why are there two non-trivial T-invariant subspaces and why the restriction to T is cyclic?

Published on 17 Apr 2026 - 7:10

score 547 · Answer 5 · 2026-04-17 05:47:36

547

Views

Two versions of constant rank theorem

Published on 17 Apr 2026 - 5:47

score 138 · Answer 6 · 2026-04-11 23:47:42

138

Views

How to derive the explicit formula for 2-dimensional recurrence relation $ f(m,n)$?

Published on 11 Apr 2026 - 23:47

score 338 · Answer 7 · 2026-05-05 12:21:26

338

Views

The Endomorphism algebra of graded vector space

Published on 05 May 2026 - 12:21

score 60 · Answer 8 · 2026-04-15 11:51:52

60

Views

Let $u$ and $v$ in $\mathbb R^n$. Evaluate $\|3u - 2v\|$ given that $\|u\| = 4, \|v\| = 5$, and $u\cdot v= 3$

Published on 15 Apr 2026 - 11:51

score 96 · Answer 9 · 2026-04-10 21:19:09

96

Views

How to find the eigenvectors of this matrix?

Published on 10 Apr 2026 - 21:19

score 55 · Answer 10 · 2026-04-15 10:37:07

55

Views

How is the derivative of a function $V : \mathbb{R}^{n\times n} \mapsto \mathbb{R}$ defined?

Published on 15 Apr 2026 - 10:37

score 29 · Answer 11 · 2026-03-24 22:07:43

29

Views

$Q \leq_{S^{n}} 0$ if and only if $Q \leq_{S^{n}} sI$ for some $s < 0$

Published on 24 Mar 2026 - 22:07

score 262 · Answer 12 · 2026-04-09 19:31:23

262

Views

prove unitary variance of operator 2 norm

Published on 09 Apr 2026 - 19:31

score 43 · Answer 13 · 2026-04-13 04:55:07

43

Views

About divisibility of n, where n is the order of a square matrix.

Published on 13 Apr 2026 - 4:55

score 64 · Answer 14 · 2026-04-13 22:53:06

64

Views

Determine congruent transformation between a pair of rotation matrix

Published on 13 Apr 2026 - 22:53

score 115 · Answer 15 · 2026-04-14 13:16:00

115

Views

Solve $ \arg \min_{V} {\left\| {V}^{T} V - T \right\|}_{2} $ over $ V \in \mathbb{R}^{n \times m} $

Published on 14 Apr 2026 - 13:16

List Question

Skew-symmetric matrices and invariants

If a matrix does not have have only the trivial solution, are the columns linearly dependent?

Meaning of $x^T A x$

Why are there two non-trivial T-invariant subspaces and why the restriction to T is cyclic?

Two versions of constant rank theorem

How to derive the explicit formula for 2-dimensional recurrence relation $ f(m,n)$?

The Endomorphism algebra of graded vector space

Let $u$ and $v$ in $\mathbb R^n$. Evaluate $\|3u - 2v\|$ given that $\|u\| = 4, \|v\| = 5$, and $u\cdot v= 3$

How to find the eigenvectors of this matrix?

How is the derivative of a function $V : \mathbb{R}^{n\times n} \mapsto \mathbb{R}$ defined?

$Q \leq_{S^{n}} 0$ if and only if $Q \leq_{S^{n}} sI$ for some $s < 0$

prove unitary variance of operator 2 norm

About divisibility of n, where n is the order of a square matrix.

Determine congruent transformation between a pair of rotation matrix

Solve $ \arg \min_{V} {\left\| {V}^{T} V - T \right\|}_{2} $ over $ V \in \mathbb{R}^{n \times m} $

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