List questions from matrix-calculus

Published on 03 Apr 2026 - 1:48

88

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Gradient of $(x,y) \mapsto y^\top A(x) y$

Published on 25 Mar 2026 - 17:22

66

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Identity tensor outer product representation

Published on 27 Mar 2026 - 0:00

144

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Derivative of $\frac{\partial f(X^{\top}X)}{\partial X}$

Published on 25 Mar 2026 - 17:19

99

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Proving that the norm $n \|A\|_{l_\infty}$ is a matrix norm.

Published on 26 Mar 2026 - 17:12

45

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What is the mathematical principle that explains the shape of a curve that depicts the mean distance between points on a grid and every other point?

Published on 18 May 2023 - 22:41

37

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Chain rule for derivative with respect to a matrix

Published on 20 May 2023 - 22:56

26

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Question About Matrix Component Notation

Published on 21 May 2023 - 12:19

72

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Derivative of a vector with respect to a matrix with quadratic term

Published on 24 May 2023 - 9:37

23

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Z-module matrix calculation

Published on 24 May 2023 - 12:53

156

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Hessian matrix of $\Lambda \mapsto y' (I + X\Lambda X')^{-1}y$

Published on 26 Mar 2026 - 3:00

59

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Derivative of matrix variable product with respect to matrix variable

Published on 29 May 2023 - 22:31

73

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Matrix calculus with row vectors

Published on 30 May 2023 - 16:34

189

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What is the Hessian of $x \mapsto\log \det \left( A^T A + R^T \operatorname{diag}(x)^{-1} R \right)$?

Published on 25 Mar 2026 - 17:26

196

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When is a solution of a differential matrix Riccati equation positive definite?

Published on 26 Mar 2026 - 17:32

List Question

Deriving a Restricted Mean Matrix for Matrix variate data

Gradient of $(x,y) \mapsto y^\top A(x) y$

Identity tensor outer product representation

Derivative of $\frac{\partial f(X^{\top}X)}{\partial X}$

Proving that the norm $n \|A\|_{l_\infty}$ is a matrix norm.

What is the mathematical principle that explains the shape of a curve that depicts the mean distance between points on a grid and every other point?

Chain rule for derivative with respect to a matrix

Question About Matrix Component Notation

Derivative of a vector with respect to a matrix with quadratic term

Z-module matrix calculation

Hessian matrix of $\Lambda \mapsto y' (I + X\Lambda X')^{-1}y$

Derivative of matrix variable product with respect to matrix variable

Matrix calculus with row vectors

What is the Hessian of $x \mapsto\log \det \left( A^T A + R^T \operatorname{diag}(x)^{-1} R \right)$?

When is a solution of a differential matrix Riccati equation positive definite?

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