Question

Is there a linear transformation that would flip the elements of a matrix around its center?

score 522 · Answer 1 · 2026-03-25 09:53:28

522

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Is there a linear transformation that would flip the elements of a matrix around its center?

Published on 25 Mar 2026 - 9:53

score 94 · Answer 2 · 2026-03-25 09:47:16

94

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Find minimal eigenvalue of the permutation matrix

Published on 25 Mar 2026 - 9:47

score 110 · Answer 3 · 2026-03-25 09:51:17

110

Views

How to prove the number of three-order $3\times 3$ matrices with row and column sums both equal to $r$ is $H_3(r) = \binom{r+5}{5} - \binom{r+2}{5}$?

Published on 25 Mar 2026 - 9:51

score 403 · Answer 4 · 2026-03-25 09:50:03

403

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Sum of Traces of all Permutations of a Matrix

Published on 25 Mar 2026 - 9:50

score 136 · Answer 5 · 2026-03-25 09:50:00

136

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Permutations of 1 to k among rows and columns of an n-order matrix

Published on 25 Mar 2026 - 9:50

score 200 · Answer 6 · 2026-03-25 09:48:47

200

Views

Matrices that commute with Elements from the Symmetric-Group and the Hyperoctahedral Group

Published on 25 Mar 2026 - 9:48

score 67 · Answer 7 · 2026-03-25 09:49:59

67

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Orthogonal projections of permutation matrices are symmetry group of regular simplex?

Published on 25 Mar 2026 - 9:49

score 473 · Answer 8 · 2026-05-10 17:55:56

473

Views

$PA = LU$ decomposition

Published on 10 May 2026 - 17:55

score 1k · Answer 9 · 2026-03-25 11:20:19

1k

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An $n\times n$ matrix that has exactly one $1$ and one $-1$ in each row and column and others are $0$

Published on 25 Mar 2026 - 11:20

score 420 · Answer 10 · 2026-04-01 07:34:14

420

Views

Permutation matrices with trace $0$.

Published on 01 Apr 2026 - 7:34

score 208 · Answer 11 · 2026-03-25 09:48:31

208

Views

Orthogonal matrices $A$ for which $A^n = I$

Published on 25 Mar 2026 - 9:48

score 424 · Answer 12 · 2026-05-10 16:00:45

424

Views

Fourier transform of circulant or cyclic permutation matrix

Published on 10 May 2026 - 16:00

score 21 · Answer 13 · 2026-03-25 09:47:07

21

Views

How many permutation matrices are their own transpose?

Published on 25 Mar 2026 - 9:47

score 64 · Answer 14 · 2026-03-25 11:22:43

64

Views

Given $n$ unique items and an $m^{th}$ normalised value, compute $m^{th}$ permutation without factorial expansion

Published on 25 Mar 2026 - 11:22

score 502 · Answer 15 · 2026-03-25 09:48:15

502

Views

Two permutation matrices represent conjugate permutations iff they have same characteristic polynomial.

Published on 25 Mar 2026 - 9:48

List Question

Is there a linear transformation that would flip the elements of a matrix around its center?

Find minimal eigenvalue of the permutation matrix

How to prove the number of three-order $3\times 3$ matrices with row and column sums both equal to $r$ is $H_3(r) = \binom{r+5}{5} - \binom{r+2}{5}$?

Sum of Traces of all Permutations of a Matrix

Permutations of 1 to k among rows and columns of an n-order matrix

Matrices that commute with Elements from the Symmetric-Group and the Hyperoctahedral Group

Orthogonal projections of permutation matrices are symmetry group of regular simplex?

$PA = LU$ decomposition

An $n\times n$ matrix that has exactly one $1$ and one $-1$ in each row and column and others are $0$

Permutation matrices with trace $0$.

Orthogonal matrices $A$ for which $A^n = I$

Fourier transform of circulant or cyclic permutation matrix

How many permutation matrices are their own transpose?

Given $n$ unique items and an $m^{th}$ normalised value, compute $m^{th}$ permutation without factorial expansion

Two permutation matrices represent conjugate permutations iff they have same characteristic polynomial.

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