List questions from matrix-calculus

Published on 25 Mar 2026 - 23:36

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Nonnengative matrices sum and produt

Published on 27 Mar 2026 - 14:44

93

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Derivative of cost functions

Published on 30 Mar 2026 - 13:53

154

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When the singular values of a convex sum are preserved?

Published on 27 Mar 2026 - 0:03

52

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Solve $x \sqrt{x^T A x} + c =0$ for x in terms of $A$ and $c$ only

Published on 11 Feb 2020 - 21:04

103

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Proof that combined matrices are idempotent.

Published on 15 Feb 2020 - 20:13

42

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Stuck on a step in a simple matrix calculus derivation

Published on 15 Feb 2020 - 20:56

115

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Face-to-face with a trace at the end of a calculus case - what to do next?

Published on 28 Mar 2026 - 16:44

111

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Matrix-by-vector derivative Kronecker product

Published on 25 Mar 2026 - 14:21

80

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Minimization Problem - mixed 2D/3D rotation problem

Published on 16 Feb 2020 - 14:36

156

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How to show that $f:[0,1]\times{\rm Sp}(n,\mathbb{R})\to {\rm Sp}(n,\mathbb{R})$ is continuous?

Published on 17 Feb 2020 - 10:48

1.4k

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How to minimize a quadratic form with constraint that sum of elements of vector is one?

Published on 29 Mar 2026 - 8:15

72

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Orthogonal Projection of Approximate Matrix

Published on 26 Mar 2026 - 22:13

210

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Which linear maps $\mathbb{R}^{n^2} \to \mathbb{R}^{n^2} $ map $\text{GL}_n$ into $\text{GL}_n$?

Published on 25 Mar 2026 - 6:33

165

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6×6 Matrix Exponential using the Cayley-Hamilton theorem

Published on 19 Feb 2020 - 12:52

List Question

Coupled Differential Lyapunov Equation

Nonnengative matrices sum and produt

Derivative of cost functions

When the singular values of a convex sum are preserved?

Solve $x \sqrt{x^T A x} + c =0$ for x in terms of $A$ and $c$ only

Proof that combined matrices are idempotent.

Stuck on a step in a simple matrix calculus derivation

Face-to-face with a trace at the end of a calculus case - what to do next?

Matrix-by-vector derivative Kronecker product

Minimization Problem - mixed 2D/3D rotation problem

How to show that $f:[0,1]\times{\rm Sp}(n,\mathbb{R})\to {\rm Sp}(n,\mathbb{R})$ is continuous?

How to minimize a quadratic form with constraint that sum of elements of vector is one?

Orthogonal Projection of Approximate Matrix

Which linear maps $\mathbb{R}^{n^2} \to \mathbb{R}^{n^2} $ map $\text{GL}_n$ into $\text{GL}_n$?

6×6 Matrix Exponential using the Cayley-Hamilton theorem

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