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Question involving orthogonal matrix and congruent matrices $P^{t}AP=I$

score 234 · Answer 1 · 2026-03-30 22:56:40

234

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Question involving orthogonal matrix and congruent matrices $P^{t}AP=I$

Published on 30 Mar 2026 - 22:56

score 21.1k · Answer 2 · 2026-03-25 14:15:48

21.1k

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Can I extract common factor from a column in matrix?

Published on 25 Mar 2026 - 14:15

score 227 · Answer 3 · 2026-03-31 19:22:25

227

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inverse of lower triangular matrix with factorials

Published on 31 Mar 2026 - 19:22

score 35 · Answer 4 · 2018-01-23 05:37:49

35

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Question on matrices theory

Published on 23 Jan 2018 - 5:37

score 90 · Answer 5 · 2026-03-26 14:13:17

90

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If $T$ is a linear map and $\mathcal M(T)$ is its matrix, what exactly does the multiplication $\mathcal M(T)v$ mean?

Published on 26 Mar 2026 - 14:13

score 840 · Answer 6 · 2026-03-26 19:20:54

840

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Linearly independence of the set $\{I_n, A, A^2, \dots, A^{n^2} \}$, where $A$ is a square matrix

Published on 26 Mar 2026 - 19:20

score 68 · Answer 7 · 2026-03-29 15:25:28

68

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If $A \in \mathcal M_n(\mathbb C)$ is of finite order then $\vert \operatorname{tr}(A) \vert \le n$

Published on 29 Mar 2026 - 15:25

score 60 · Answer 8 · 2026-03-24 20:38:06

60

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Norm of a particular matrix (regarding inequality)

Published on 24 Mar 2026 - 20:38

score 1.4k · Answer 9 · 2026-03-24 07:17:56

1.4k

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Let $A$ be a diagonalizable real matrix such as $A^3=A$. Prove that $\mbox{rank}(A) = \mbox{tr}(A^2)$

Published on 24 Mar 2026 - 7:17

score 5.5k · Answer 10 · 2026-03-26 18:58:18

5.5k

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Is the identity matrix an upper triangular matrix?

Published on 26 Mar 2026 - 18:58

score 15k · Answer 11 · 2026-03-27 23:00:20

15k

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Find all $x \in\mathbb R^4$ that are mapped into the zero vector by the transformation $x \mapsto Ax$

Published on 27 Mar 2026 - 23:00

score 30 · Answer 12 · 2026-03-22 07:53:22

30

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integrand of norm subjected to translation

Published on 22 Mar 2026 - 7:53

score 35 · Answer 13 · 2026-03-25 07:43:52

35

Views

Determining if $m \times n$ matrix spans $\mathbb{R}^{m-1}$ space

Published on 25 Mar 2026 - 7:43

score 55 · Answer 14 · 2026-03-25 11:08:48

55

Views

Help to calculate eigenvectors

Published on 25 Mar 2026 - 11:08

score 89 · Answer 15 · 2018-01-24 02:28:33

89

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Is it true for the symmetric matrices?

Published on 24 Jan 2018 - 2:28

List Question

Question involving orthogonal matrix and congruent matrices $P^{t}AP=I$

Can I extract common factor from a column in matrix?

inverse of lower triangular matrix with factorials

Question on matrices theory

If $T$ is a linear map and $\mathcal M(T)$ is its matrix, what exactly does the multiplication $\mathcal M(T)v$ mean?

Linearly independence of the set $\{I_n, A, A^2, \dots, A^{n^2} \}$, where $A$ is a square matrix

If $A \in \mathcal M_n(\mathbb C)$ is of finite order then $\vert \operatorname{tr}(A) \vert \le n$

Norm of a particular matrix (regarding inequality)

Let $A$ be a diagonalizable real matrix such as $A^3=A$. Prove that $\mbox{rank}(A) = \mbox{tr}(A^2)$

Is the identity matrix an upper triangular matrix?

Find all $x \in\mathbb R^4$ that are mapped into the zero vector by the transformation $x \mapsto Ax$

integrand of norm subjected to translation

Determining if $m \times n$ matrix spans $\mathbb{R}^{m-1}$ space

Help to calculate eigenvectors

Is it true for the symmetric matrices?

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