Question

How to check if the columns of a given vector spans Rn

score 20.8k · Answer 1 · 2026-03-27 00:03:59

20.8k

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How to check if the columns of a given vector spans Rn

Published on 27 Mar 2026 - 0:03

score 304 · Answer 2 · 2026-03-23 00:59:42

304

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Reflection matrix in $\Bbb R^2$ (matrix $R$ satisfying $R^2 = 1$)

Published on 23 Mar 2026 - 0:59

score 80 · Answer 3 · 2026-03-26 22:16:14

80

Views

Real parts of diagonal elements of $(I-U)^{-1}(I+U)$ are zero?

Published on 26 Mar 2026 - 22:16

score 135 · Answer 4 · 2026-03-26 16:10:09

135

Views

Let $V$ be a vector space of dimension $m\geq 2$ and $T: V\to V$ be a linear transformation such that $T^{n+1}=0$ and $T^{n}\neq 0$

Published on 26 Mar 2026 - 16:10

score 1.2k · Answer 5 · 2026-03-20 11:22:15

1.2k

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How the principal submatrix of a PSD matrix could be positive definite?

Published on 20 Mar 2026 - 11:22

score 2.9k · Answer 6 · 2026-03-29 22:24:30

2.9k

Views

Hadamard product of a positive semidefinite matrix with a negative definite matrix

Published on 29 Mar 2026 - 22:24

score 215 · Answer 7 · 2026-03-24 23:49:54

215

Views

Inverse of a particular matrix: $A = D + aJ$, all entries of $J$ are equal to $1$

Published on 24 Mar 2026 - 23:49

score 6.8k · Answer 8 · 2026-03-22 20:40:08

6.8k

Views

Positive-definiteness of the Schur Complement

Published on 22 Mar 2026 - 20:40

score 1.9k · Answer 9 · 2026-03-24 20:32:13

1.9k

Views

Norm of a vector and a positive definite matrix (inequality)

Published on 24 Mar 2026 - 20:32

score 204 · Answer 10 · 2026-03-22 01:12:11

204

Views

Showing a block matrix is SPD

Published on 22 Mar 2026 - 1:12

score 933 · Answer 11 · 2026-03-20 05:39:04

933

Views

inverting a matrix using the LU decomposition approach

Published on 20 Mar 2026 - 5:39

score 29 · Answer 12 · 2018-01-24 15:13:55

29

Views

Help with definition used in description of circle-line intersection

Published on 24 Jan 2018 - 15:13

score 482 · Answer 13 · 2026-03-31 17:17:49

482

Views

How to simulate a random unitary matrix with the condition that each entry is a complex number with the absolute value 1 in matlab

Published on 31 Mar 2026 - 17:17

score 6.4k · Answer 14 · 2026-03-24 23:51:36

6.4k

Views

Why is that if every row of a matrix sums to 1, then the rows of the inverse matrix sums to 1 too?

Published on 24 Mar 2026 - 23:51

score 189 · Answer 15 · 2018-01-24 16:26:32

189

Views

Normal matrix that isn't unitary

Published on 24 Jan 2018 - 16:26

List Question

How to check if the columns of a given vector spans Rn

Reflection matrix in $\Bbb R^2$ (matrix $R$ satisfying $R^2 = 1$)

Real parts of diagonal elements of $(I-U)^{-1}(I+U)$ are zero?

Let $V$ be a vector space of dimension $m\geq 2$ and $T: V\to V$ be a linear transformation such that $T^{n+1}=0$ and $T^{n}\neq 0$

How the principal submatrix of a PSD matrix could be positive definite?

Hadamard product of a positive semidefinite matrix with a negative definite matrix

Inverse of a particular matrix: $A = D + aJ$, all entries of $J$ are equal to $1$

Positive-definiteness of the Schur Complement

Norm of a vector and a positive definite matrix (inequality)

Showing a block matrix is SPD

inverting a matrix using the LU decomposition approach

Help with definition used in description of circle-line intersection

How to simulate a random unitary matrix with the condition that each entry is a complex number with the absolute value 1 in matlab

Why is that if every row of a matrix sums to 1, then the rows of the inverse matrix sums to 1 too?

Normal matrix that isn't unitary

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