Question

Eigenvalues of $\bf A'(AA'+BB')^{-1}A$

score 160 · Answer 1 · 2026-03-27 01:50:39

160

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Eigenvalues of $\bf A'(AA'+BB')^{-1}A$

Published on 27 Mar 2026 - 1:50

score 1.5k · Answer 2 · 2026-04-03 03:36:58

1.5k

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Is a doubly stochastic matrix positive semidefinite if the maximum of each row occurs on the diagonal?

Published on 03 Apr 2026 - 3:36

score 71 · Answer 3 · 2026-03-27 01:42:38

71

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Linear Algebra-Eigenvalue/vectors

Published on 27 Mar 2026 - 1:42

score 3.2k · Answer 4 · 2026-04-03 03:40:19

3.2k

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Determine if a vector is in the span of vectors

Published on 03 Apr 2026 - 3:40

score 590 · Answer 5 · 2026-03-25 09:38:41

590

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connection of linear combination and linear dependent and linear independent

Published on 25 Mar 2026 - 9:38

score 92 · Answer 6 · 2026-04-03 05:21:04

92

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Is it possible to find a $3 \times 3$ matrix satisfying $p(t)=t^2+t+1$

Published on 03 Apr 2026 - 5:21

score 483 · Answer 7 · 2026-03-25 01:31:13

483

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Derivative of $BAA^Tx$ with respect to $A$

Published on 25 Mar 2026 - 1:31

score 380 · Answer 8 · 2026-04-03 05:22:16

380

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Prove that $B$ is non singular and that $AB^{-1}A=A$

Published on 03 Apr 2026 - 5:22

score 55 · Answer 9 · 2026-04-03 05:21:43

55

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Elementary matrices operations and simplified expression

Published on 03 Apr 2026 - 5:21

score 60 · Answer 10 · 2026-03-26 17:18:15

60

Views

Solving $\mathbf{Bx}=\mathbf{z}$ with $\mathbf{B^T B} = \mathbf{A^T A} + \lambda \mathbf{I}$ for large matrix $\mathbf{A}$

Published on 26 Mar 2026 - 17:18

score 17k · Answer 11 · 2026-03-23 05:54:13

17k

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Operator norm calculation for simple matrix

Published on 23 Mar 2026 - 5:54

score 141 · Answer 12 · 2026-03-26 06:05:31

141

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Determinant of Union Jack matrix without Scottish diagonal

Published on 26 Mar 2026 - 6:05

score 152 · Answer 13 · 2026-03-25 01:18:55

152

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Prove $\Delta=\left|\begin{smallmatrix} 3x&-x+y&-x+z\\ -y+x&3y&-y+z\\-z+x&-z+y&3z\end{smallmatrix}\right|=3(x+y+z)(xy+yz+zx)$

Published on 25 Mar 2026 - 1:18

score 190 · Answer 14 · 2026-03-25 14:25:29

190

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$\exp$ of symmetric and skew-symmetric matrices of $\mathfrak{sl}(n, \mathbb{R})$ spans $SL(n, \mathbb{R})$

Published on 25 Mar 2026 - 14:25

score 548 · Answer 15 · 2026-03-26 07:33:16

548

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Is there a semi-norm that respects matrix similitary?

Published on 26 Mar 2026 - 7:33

List Question

Eigenvalues of $\bf A'(AA'+BB')^{-1}A$

Is a doubly stochastic matrix positive semidefinite if the maximum of each row occurs on the diagonal?

Linear Algebra-Eigenvalue/vectors

Determine if a vector is in the span of vectors

connection of linear combination and linear dependent and linear independent

Is it possible to find a $3 \times 3$ matrix satisfying $p(t)=t^2+t+1$

Derivative of $BAA^Tx$ with respect to $A$

Prove that $B$ is non singular and that $AB^{-1}A=A$

Elementary matrices operations and simplified expression

Solving $\mathbf{Bx}=\mathbf{z}$ with $\mathbf{B^T B} = \mathbf{A^T A} + \lambda \mathbf{I}$ for large matrix $\mathbf{A}$

Operator norm calculation for simple matrix

Determinant of Union Jack matrix without Scottish diagonal

Prove $\Delta=\left|\begin{smallmatrix} 3x&-x+y&-x+z\\ -y+x&3y&-y+z\\-z+x&-z+y&3z\end{smallmatrix}\right|=3(x+y+z)(xy+yz+zx)$

$\exp$ of symmetric and skew-symmetric matrices of $\mathfrak{sl}(n, \mathbb{R})$ spans $SL(n, \mathbb{R})$

Is there a semi-norm that respects matrix similitary?

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