List questions from matrix-equations

Published on 03 Dec 2019 - 15:04

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If $AX = U$ has infinitely many solutions, then prove that $BX=V$ cannot have a unique solution.

Published on 03 Apr 2026 - 17:30

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A matrix $B = A^8 - 11A^7-4A^6+A^5+A^4-11A^3-4A^2+A+I$ so what the $\det B$?

Published on 05 Dec 2019 - 1:40

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Conditions for infinite solutions

Published on 06 Dec 2019 - 5:36

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relation between matrix multiplication and Hadamard product

Published on 25 Mar 2026 - 16:08

396

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Question regarding matrix satisfying $A^8=I$

Published on 07 Dec 2019 - 13:00

96

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How many 4 by 4 real matrices $A$, up to similarity, satisfy $(A-I)(A^2 + I)^2 = 0$

Published on 09 Dec 2019 - 22:54

104

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Can we find $\alpha>0$ such that .... [tedious estimations]

Published on 27 Mar 2026 - 16:47

28

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converting element indexing equation into matrix equation

Published on 28 Mar 2026 - 21:50

253

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Proving systems of nonlinear modular equations have no solution

Published on 11 Dec 2019 - 16:42

58

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Linear Algebra (Matrixes with powers)

Published on 13 Dec 2019 - 18:19

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How to get rotation value in each axis from 4x4 transformation matrix?

Published on 30 Mar 2026 - 20:41

198

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Simplifying matrix expression by centering columns

Published on 16 Dec 2019 - 11:20

65

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Moments of Multivariate SDEs

Published on 26 Mar 2026 - 6:13

404

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Relationship between Hadamard and Inner Product

Published on 25 Mar 2026 - 17:38

List Question

Proof of $C^{T}DC$ is always symmetric for real matrices

If $AX = U$ has infinitely many solutions, then prove that $BX=V$ cannot have a unique solution.

A matrix $B = A^8 - 11A^7-4A^6+A^5+A^4-11A^3-4A^2+A+I$ so what the $\det B$?

Conditions for infinite solutions

relation between matrix multiplication and Hadamard product

Question regarding matrix satisfying $A^8=I$

How many 4 by 4 real matrices $A$, up to similarity, satisfy $(A-I)(A^2 + I)^2 = 0$

Can we find $\alpha>0$ such that .... [tedious estimations]

converting element indexing equation into matrix equation

Proving systems of nonlinear modular equations have no solution

Linear Algebra (Matrixes with powers)

How to get rotation value in each axis from 4x4 transformation matrix?

Simplifying matrix expression by centering columns

Moments of Multivariate SDEs

Relationship between Hadamard and Inner Product

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