List questions from matrices

Published on 11 Apr 2026 - 19:11

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Projective linear group PGLn()

Published on 13 Apr 2026 - 20:59

1.9k

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Right inverse implies at least a solution to AX=b and left inverse implies at most a solution to AX=b

Published on 14 Apr 2026 - 12:30

141

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Finding the minimal value of a $4\times 4$ determinant

Published on 25 Mar 2026 - 11:54

3.2k

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Matrix representation of complex number is just a trick?

Published on 13 Apr 2026 - 12:33

68

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Unsure of how to proceed through Trace Property

Published on 09 Apr 2026 - 14:45

114

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Is it true that $\|A\circ \bar{A}\|_2\leq\|AA^{\dagger}\|_2$?

Published on 02 May 2026 - 10:30

36

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Confused about covariance matrix notation in PCA explanation

Published on 11 Apr 2026 - 12:16

61

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Is it possible for the range of a matrix to be equal to the null space of its transpose? How does this have to do with real vs. complex?

Published on 10 Apr 2026 - 1:23

4.7k

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Trace of a Matrix: when to use? what is trace trick?

Published on 11 Apr 2026 - 9:52

175

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Relation between determinant of a Jacobi matrix and its minor

Published on 14 Apr 2026 - 7:09

50

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How find this determinant

Published on 11 Apr 2026 - 10:17

189

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Let $A = \left( \begin{smallmatrix} 1 & 0 \\ 1 & 1 \end{smallmatrix} \right)$ . Using elementary matrices, determine $A^n$ for any natural number $n$.

Published on 15 Apr 2026 - 3:31

378

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Determinant of Identity plus matrix times diagonal -- why does this hold?

Published on 12 Apr 2026 - 5:05

428

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Estimate of the perturbation of the spectral radius of a positive matrix

Published on 14 Apr 2026 - 2:14

List Question

Eigenvalues of a Matrix with Positive Entries

Projective linear group PGLn()

Right inverse implies at least a solution to AX=b and left inverse implies at most a solution to AX=b

Finding the minimal value of a $4\times 4$ determinant

Matrix representation of complex number is just a trick?

Unsure of how to proceed through Trace Property

Is it true that $\|A\circ \bar{A}\|_2\leq\|AA^{\dagger}\|_2$?

Confused about covariance matrix notation in PCA explanation

Is it possible for the range of a matrix to be equal to the null space of its transpose? How does this have to do with real vs. complex?

Trace of a Matrix: when to use? what is trace trick?

Relation between determinant of a Jacobi matrix and its minor

How find this determinant

Let $A = \left( \begin{smallmatrix} 1 & 0 \\ 1 & 1 \end{smallmatrix} \right)$ . Using elementary matrices, determine $A^n$ for any natural number $n$.

Determinant of Identity plus matrix times diagonal -- why does this hold?

Estimate of the perturbation of the spectral radius of a positive matrix

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