Question

$A \in M_2(\mathbb{R})$ positive stable if and only if $\textrm{trace}(A) > 0$ and $\det(A) > 0$?

score 71 · Answer 1 · 2026-04-12 04:29:55

71

Views

$A \in M_2(\mathbb{R})$ positive stable if and only if $\textrm{trace}(A) > 0$ and $\det(A) > 0$?

Published on 12 Apr 2026 - 4:29

score 41 · Answer 2 · 2026-04-16 14:32:49

41

Views

To find the rank of a matrix:

Published on 16 Apr 2026 - 14:32

score 764 · Answer 3 · 2026-04-12 14:54:03

764

Views

Sums of Nilpotent Matrices

Published on 12 Apr 2026 - 14:54

score 651 · Answer 4 · 2026-04-14 18:13:28

651

Views

Is there any elegant way to calculate the eigenvalues of the Cartan matrix of type $A_n$?

Published on 14 Apr 2026 - 18:13

score 29 · Answer 5 · 2026-04-29 12:52:44

29

Views

Arithmetic Progressions in Abstract Root Systems

Published on 29 Apr 2026 - 12:52

score 72 · Answer 6 · 2026-04-15 08:10:49

72

Views

Show that E_n - λN is invertible for every λ∈K and determine (E_n - λN)^-1

Published on 15 Apr 2026 - 8:10

score 23 · Answer 7 · 2026-04-11 02:47:18

23

Views

Factorizing a linear map through another one that has a smaller kernel

Published on 11 Apr 2026 - 2:47

score 367 · Answer 8 · 2026-04-10 09:45:38

367

Views

How to I find T(0,1,1)?

Published on 10 Apr 2026 - 9:45

score 95 · Answer 9 · 2026-04-14 17:24:02

95

Views

Constructing two symmetrical square matrices from a non-square matrix

Published on 14 Apr 2026 - 17:24

score 113 · Answer 10 · 2026-04-29 12:50:10

113

Views

How can I prove that the determinant of the matrix is $0$ only when $a=b=c=d=0$?

Published on 29 Apr 2026 - 12:50

score 44 · Answer 11 · 2026-04-10 22:31:37

44

Views

Denormalizing a linear combination of normalized variables

Published on 10 Apr 2026 - 22:31

score 887 · Answer 12 · 2026-04-14 14:06:30

887

Views

Minimum and maximum eigenvalues of $B$

Published on 14 Apr 2026 - 14:06

score 236 · Answer 13 · 2026-04-29 12:27:58

236

Views

Benefits of factoring matrix multiplication into two matrix multiplications?

Published on 29 Apr 2026 - 12:27

score 39 · Answer 14 · 2026-04-09 22:59:37

39

Views

how to solve an equation with coordinates

Published on 09 Apr 2026 - 22:59

score 27 · Answer 15 · 2026-04-13 06:17:06

27

Views

Problem about the number of values the sum of two variables can take.

Published on 13 Apr 2026 - 6:17

List Question

$A \in M_2(\mathbb{R})$ positive stable if and only if $\textrm{trace}(A) > 0$ and $\det(A) > 0$?

To find the rank of a matrix:

Sums of Nilpotent Matrices

Is there any elegant way to calculate the eigenvalues of the Cartan matrix of type $A_n$?

Arithmetic Progressions in Abstract Root Systems

Show that E_n - λN is invertible for every λ∈K and determine (E_n - λN)^-1

Factorizing a linear map through another one that has a smaller kernel

How to I find T(0,1,1)?

Constructing two symmetrical square matrices from a non-square matrix

How can I prove that the determinant of the matrix is $0$ only when $a=b=c=d=0$?

Denormalizing a linear combination of normalized variables

Minimum and maximum eigenvalues of $B$

Benefits of factoring matrix multiplication into two matrix multiplications?

how to solve an equation with coordinates

Problem about the number of values the sum of two variables can take.

Trending Questions

Popular # Hahtags

Popular Questions