List questions from matrix-equations

Published on 18 Apr 2026 - 7:35

118

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Functions of a Matrix

Published on 24 Apr 2026 - 23:09

74

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Find Linear Map between Majorized Vectors

Published on 14 Mar 2026 - 14:14

275

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prove that a 2D matrix finite difference equation is symmetric and positive definite

Published on 14 Apr 2026 - 4:38

350

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Using a pseudo-inverse for the solution/least-squares of $X$ in $AXA^T=B$

Published on 11 Apr 2026 - 20:16

56

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re-writte $AX B+C(X \odot X) D $ into compact form $f(\mathbf{A},\mathbf{B}, \mathbf{C}, \mathbf{D}) \mathbf{X}$

Published on 16 Apr 2026 - 9:22

233

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Orthogonal Projection Operator and a Subset

Published on 14 Apr 2026 - 4:21

144

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Matrix equation $X+AX^{-1}A^T=B$

Published on 11 Apr 2026 - 6:44

359

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Let $A$ and $B$ be arbitrary $n \times n$ matrices. If $B$ is invertible, prove that $AB^{-1} = B^{-1}A$ if and only if $AB=BA$.

Published on 16 Apr 2026 - 14:47

311

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How is $w=\lambda^{-1}X'(y-Xw)$ derived? [Ridge Regression]

Published on 15 Apr 2026 - 4:59

191

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Spectral norm inequality: Applying lipschitz continous function elementwise

Published on 14 Apr 2026 - 23:22

201

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Inequality for Hadamard product of matrices

Published on 11 Apr 2026 - 23:05

185

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Perfect square in terms of matrices

Published on 25 Apr 2026 - 0:57

68

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How can I multiply 2 matrices by a coefficient and then sum the results?

Published on 14 Apr 2026 - 10:18

99

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$X$ a $2\times 2$ matrix, find $Y$ such that $Y^{n}=X$

Published on 15 Apr 2026 - 2:23

List Question

Is there an explicit solution to this equation?

Functions of a Matrix

Find Linear Map between Majorized Vectors

prove that a 2D matrix finite difference equation is symmetric and positive definite

Using a pseudo-inverse for the solution/least-squares of $X$ in $AXA^T=B$

re-writte $AX B+C(X \odot X) D $ into compact form $f(\mathbf{A},\mathbf{B}, \mathbf{C}, \mathbf{D}) \mathbf{X}$

Orthogonal Projection Operator and a Subset

Matrix equation $X+AX^{-1}A^T=B$

Let $A$ and $B$ be arbitrary $n \times n$ matrices. If $B$ is invertible, prove that $AB^{-1} = B^{-1}A$ if and only if $AB=BA$.

How is $w=\lambda^{-1}X'(y-Xw)$ derived? [Ridge Regression]

Spectral norm inequality: Applying lipschitz continous function elementwise

Inequality for Hadamard product of matrices

Perfect square in terms of matrices

How can I multiply 2 matrices by a coefficient and then sum the results?

$X$ a $2\times 2$ matrix, find $Y$ such that $Y^{n}=X$

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