Question

Positive semidefinitness of commutators of representations

score 29 · Answer 1 · 2023-11-08 03:56:40

29

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Positive semidefinitness of commutators of representations

Published on 08 Nov 2023 - 3:56

score 15 · Answer 2 · 2026-03-05 04:07:40

15

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How can we ensure the matrix $\mathbf{T} - ( \mathbf{C} \circ \mathbf{A} )( \mathbf{C} \circ \mathbf{A} )^H$ is positive semi-definite(PSD)

Published on 05 Mar 2026 - 4:07

score 23 · Answer 3 · 2023-11-23 10:22:50

23

Views

Problem regarding Positive Semi definite matrices

Published on 23 Nov 2023 - 10:22

score 119 · Answer 4 · 2023-11-30 06:24:14

119

Views

Matrix with entries $A_{ij} = u^{|i-j|} - u^{i+j}$ is positive semidefinite when $u \in (0, 1)$?

Published on 30 Nov 2023 - 6:24

score 31 · Answer 5 · 2026-03-27 06:09:55

31

Views

Projections in semi-normed spaces

Published on 27 Mar 2026 - 6:09

score 26 · Answer 6 · 2023-12-04 17:51:36

26

Views

Do the sum of a positive semi-definite matrix and a matrix which eigenvalues are positive or egal to zero have positive or egal to zero eigenvalues?

Published on 04 Dec 2023 - 17:51

score 63 · Answer 7 · 2023-12-11 05:43:56

63

Views

$2×2 $ real symmetric matrix full classification

Published on 11 Dec 2023 - 5:43

score 84 · Answer 8 · 2026-03-25 20:34:46

84

Views

Matrix inequality involving square root and positive matrices

Published on 25 Mar 2026 - 20:34

score 38 · Answer 9 · 2023-12-19 11:44:52

38

Views

Matrix built from 2 covariance matrices is also a covariance matrix

Published on 19 Dec 2023 - 11:44

score 77 · Answer 10 · 2023-12-21 13:16:25

77

Views

How to prove the inequality $\det\left(\sum_{i=1}^k{A_i^TA_i}\right) \geq 0$ for matrices $A_1, \dots, A_k\in M_n(\mathbb{R})$?

Published on 21 Dec 2023 - 13:16

score 70 · Answer 11 · 2026-03-25 10:58:28

70

Views

From where does positive semidefinite thing came

Published on 25 Mar 2026 - 10:58

score 95 · Answer 12 · 2023-12-31 01:10:40

95

Views

Product of a positive semi-definite matrix and a diagonal matrix

Published on 31 Dec 2023 - 1:10

score 42 · Answer 13 · 2026-03-25 17:32:07

42

Views

Positive semidefiniteness of a RKHS

Published on 25 Mar 2026 - 17:32

score 27 · Answer 14 · 2024-01-17 16:23:14

27

Views

What is the relationship between a P-matrix and a positive definite matrix?

Published on 17 Jan 2024 - 16:23

score 45 · Answer 15 · 2024-01-17 19:51:21

45

Views

Square root of non-symmetric positive semi-definite matrix.

Published on 17 Jan 2024 - 19:51

List Question

Positive semidefinitness of commutators of representations

How can we ensure the matrix $\mathbf{T} - ( \mathbf{C} \circ \mathbf{A} )( \mathbf{C} \circ \mathbf{A} )^H$ is positive semi-definite(PSD)

Problem regarding Positive Semi definite matrices

Matrix with entries $A_{ij} = u^{|i-j|} - u^{i+j}$ is positive semidefinite when $u \in (0, 1)$?

Projections in semi-normed spaces

Do the sum of a positive semi-definite matrix and a matrix which eigenvalues are positive or egal to zero have positive or egal to zero eigenvalues?

$2×2 $ real symmetric matrix full classification

Matrix inequality involving square root and positive matrices

Matrix built from 2 covariance matrices is also a covariance matrix

How to prove the inequality $\det\left(\sum_{i=1}^k{A_i^TA_i}\right) \geq 0$ for matrices $A_1, \dots, A_k\in M_n(\mathbb{R})$?

From where does positive semidefinite thing came

Product of a positive semi-definite matrix and a diagonal matrix

Positive semidefiniteness of a RKHS

What is the relationship between a P-matrix and a positive definite matrix?

Square root of non-symmetric positive semi-definite matrix.

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