List questions from matrix-calculus

Published on 25 Mar 2026 - 21:22

849

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The nonsingular matrix closest to singular one

Published on 21 Nov 2018 - 19:52

2.4k

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Gradient of $||Ax - y||^2$ with respect to $A$

Published on 22 Nov 2018 - 6:38

1.8k

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Multiplying only diagonal elements of a matrix

Published on 26 Mar 2026 - 7:56

69

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Decomposing a positive semi-definite matrix with all -1,+1 elements

Published on 25 Mar 2026 - 7:41

54

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Derivative of ${\rm Re} \left\{ {\rm tr} \left [Z^H \left( AX \right) \right] \right\}$ w.r.t. $X \in \mathbb{C}^{m \times n}$.

Published on 23 Nov 2018 - 15:22

73

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LU decomposition of a matrix given LU decomposition of its blocks.

Published on 25 Mar 2026 - 3:07

39

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Derivative of $f = {\rm tr} \left[ U^T \; {\rm unvec} \left( B \ {\rm vec}(X) \right) \right]$ w.r.t. $X$?

Published on 25 Nov 2018 - 19:20

192

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Choosing the adequate layout convention for matrix derivatives

Published on 28 Nov 2018 - 1:17

50

Views

Why the intersection appears in the matrix

Published on 28 Nov 2018 - 3:10

37

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Is the spectral decompsoition of semidefinite matrix unique?

Published on 26 Mar 2026 - 9:16

71

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Find a response vector that minimizes the distance to the true line

Published on 26 Mar 2026 - 4:30

57

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Matrix calculus (simple question)

Published on 30 Nov 2018 - 15:04

38

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How to find multiplicity of eigenvalues?

Published on 26 Mar 2026 - 19:09

155

Views

$A^TJA = J$ $ \rightarrow \det(A) = 1$

Published on 02 Dec 2018 - 20:39

List Question

Derivate of an Inverse of a Matrix

The nonsingular matrix closest to singular one

Gradient of $||Ax - y||^2$ with respect to $A$

Multiplying only diagonal elements of a matrix

Decomposing a positive semi-definite matrix with all -1,+1 elements

Derivative of ${\rm Re} \left\{ {\rm tr} \left [Z^H \left( AX \right) \right] \right\}$ w.r.t. $X \in \mathbb{C}^{m \times n}$.

LU decomposition of a matrix given LU decomposition of its blocks.

Derivative of $f = {\rm tr} \left[ U^T \; {\rm unvec} \left( B \ {\rm vec}(X) \right) \right]$ w.r.t. $X$?

Choosing the adequate layout convention for matrix derivatives

Why the intersection appears in the matrix

Is the spectral decompsoition of semidefinite matrix unique?

Find a response vector that minimizes the distance to the true line

Matrix calculus (simple question)

How to find multiplicity of eigenvalues?

$A^TJA = J$ $ \rightarrow \det(A) = 1$

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