Question

Finding the $3 \times 3$ transformation matrix with respect to standard basis for $A \mapsto A+A^T$

score 29 · Answer 1 · 2026-03-27 07:18:48

29

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Finding the $3 \times 3$ transformation matrix with respect to standard basis for $A \mapsto A+A^T$

Published on 27 Mar 2026 - 7:18

score 522 · Answer 2 · 2026-03-25 22:09:26

522

Views

Determinant of a matrix after changes

Published on 25 Mar 2026 - 22:09

score 1k · Answer 3 · 2018-02-07 22:11:44

1k

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Find the values of A and b for which the planes are parallel

Published on 07 Feb 2018 - 22:11

score 546 · Answer 4 · 2026-03-24 20:38:07

546

Views

Rank of matrices, $Ax = b$

Published on 24 Mar 2026 - 20:38

score 44 · Answer 5 · 2026-03-24 02:58:29

44

Views

When is $ (1+ |x+y|^2)^{\alpha}(x_i + y_i)(x_j + y_j) \leq C \frac{1}{(|x|+|y|)^2}$ true?

Published on 24 Mar 2026 - 2:58

score 418 · Answer 6 · 2026-03-25 19:01:20

418

Views

Solving a linear equation with a double dot product

Published on 25 Mar 2026 - 19:01

score 412 · Answer 7 · 2026-03-26 14:27:44

412

Views

Checking if a vector can be eigenvector of an eigenvalue.

Published on 26 Mar 2026 - 14:27

score 2.3k · Answer 8 · 2026-03-27 07:12:04

2.3k

Views

Verify that T is a linear transformation

Published on 27 Mar 2026 - 7:12

score 83 · Answer 9 · 2026-03-26 16:05:51

83

Views

Geometric proof that $a_1 b_1 + a_2 b_2 = | \vec a | |\vec b | \cos(\varphi)$

Published on 26 Mar 2026 - 16:05

score 192 · Answer 10 · 2026-03-27 07:14:14

192

Views

How to determine whether transformation is linear and finding its matrix?

Published on 27 Mar 2026 - 7:14

score 507 · Answer 11 · 2018-02-08 03:33:18

507

Views

Augmented Matrix Free Variables

Published on 08 Feb 2018 - 3:33

score 88 · Answer 12 · 2026-03-25 06:06:19

88

Views

How to show the order of vectors doesn't matter when proving affine independence

Published on 25 Mar 2026 - 6:06

score 110 · Answer 13 · 2026-03-26 18:09:17

110

Views

Is there any connection between the fact that a set of vectors are mutually orthogonal and the same set of vectors are linearly independent

Published on 26 Mar 2026 - 18:09

score 439 · Answer 14 · 2026-03-24 22:01:52

439

Views

How can a bijection from $\mathbb R^n \to \mathbb R$ exist when a non square matrix is not invertible?

Published on 24 Mar 2026 - 22:01

score 466 · Answer 15 · 2026-03-22 06:00:25

466

Views

Either a self-adjoint operator has $n$ eigenvector or not at all

Published on 22 Mar 2026 - 6:00

List Question

Finding the $3 \times 3$ transformation matrix with respect to standard basis for $A \mapsto A+A^T$

Determinant of a matrix after changes

Find the values of A and b for which the planes are parallel

Rank of matrices, $Ax = b$

When is $ (1+ |x+y|^2)^{\alpha}(x_i + y_i)(x_j + y_j) \leq C \frac{1}{(|x|+|y|)^2}$ true?

Solving a linear equation with a double dot product

Checking if a vector can be eigenvector of an eigenvalue.

Verify that T is a linear transformation

Geometric proof that $a_1 b_1 + a_2 b_2 = | \vec a | |\vec b | \cos(\varphi)$

How to determine whether transformation is linear and finding its matrix?

Augmented Matrix Free Variables

How to show the order of vectors doesn't matter when proving affine independence

Is there any connection between the fact that a set of vectors are mutually orthogonal and the same set of vectors are linearly independent

How can a bijection from $\mathbb R^n \to \mathbb R$ exist when a non square matrix is not invertible?

Either a self-adjoint operator has $n$ eigenvector or not at all

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