User Nathaniel Johnston

6 votes

Maximum determinant of binary matrices with special properties

answered Apr 3 at 16:14

4 votes

Accepted

Monotonicity of matrix conjugation

answered Mar 18 at 8:37

3 votes

Accepted

Does this matrix equation always have a solution?

answered Nov 24, 2023 at 21:44

1 vote

Accepted

Orthonormal matrices with columns that switch signs

answered May 25, 2023 at 16:02

2 votes

Accepted

Seeking closed-form solution for vector equation

answered May 8, 2023 at 18:29

12 votes

Conditions for including cones

answered May 1, 2023 at 17:34

3 votes

Accepted

Questions about hermitian positive semidefinite matrices

answered Dec 27, 2022 at 2:44

3 votes

Eigenvectors that are tensor products?

answered Nov 15, 2022 at 22:08

7 votes

Accepted

Solution to a Sylvester equation with positive definite coefficients

answered Aug 11, 2022 at 20:52

10 votes

Product of the entries of a matrix

answered Jun 1, 2022 at 16:17

22 votes

Which theorems have Pythagoras' Theorem as a special case?

answered May 5, 2022 at 12:08

17 votes

Possible values of the determinant for matrices with elements $\{1, 0, -1\}$

answered Apr 17, 2022 at 22:45

5 votes

Dual norm of a subspace of $\ell_\infty^3$

answered Feb 24, 2022 at 17:14

16 votes

Find the determinant of a matrix given the determinant of all $p\times p$ sub-matrices?

answered Feb 21, 2022 at 17:09

5 votes

When does a finite metric induce a matrix norm?

answered Sep 14, 2021 at 23:14

1 vote

Video lectures of mathematics courses available online for free

answered Aug 3, 2021 at 17:26

4 votes

Accepted

Operation including tensor product or Kronecker product transforming matrix $A$ into matrix $B$

answered Jul 23, 2021 at 13:14

2 votes

Accepted

rank of a linear combination of matrices

answered Jun 7, 2021 at 13:41

9 votes

Accepted

Is there a name for this type of matrix?

answered May 24, 2021 at 17:37

7 votes

Accepted

Tensor product of positive linear maps is positive

answered May 14, 2021 at 15:34

3 votes

limit of vector sequence is in range of limit of matrix sequence

answered Dec 7, 2020 at 17:14

3 votes

Complexity of solving $\sum_i A_i X B_i = C$

answered Nov 18, 2020 at 1:37

3 votes

Is the set of two-qubit absolutely separable states convex, and if so, what are its John ellipsoids?

answered Nov 12, 2020 at 13:40

5 votes

Accepted

Computing $(AA\otimes BB + AB \otimes BA)^{-1}$

answered Oct 28, 2020 at 11:03

31 votes

Square root of doubly positive symmetric matrices

answered Oct 18, 2020 at 10:41

11 votes

Linear algebra underlying quantum entanglement?

answered Mar 5, 2020 at 14:00

32 votes

Accepted

Necessary conditions for the existence of solution of Sylvester equation AX=XB

answered Feb 29, 2020 at 21:24

8 votes

Accepted

Positive-semidefiniteness of a Gram-like matrix

answered Feb 29, 2020 at 14:19

5 votes

Accepted

Limit of alternated row and column normalizations

answered Dec 29, 2019 at 3:46

16 votes

Operator norm of square root of matrix vs original

answered Dec 6, 2019 at 0:42

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55 Answers

Maximum determinant of binary matrices with special properties

Monotonicity of matrix conjugation

Does this matrix equation always have a solution?

Orthonormal matrices with columns that switch signs

Seeking closed-form solution for vector equation

Conditions for including cones

Questions about hermitian positive semidefinite matrices

Eigenvectors that are tensor products?

Solution to a Sylvester equation with positive definite coefficients

Product of the entries of a matrix

Which theorems have Pythagoras' Theorem as a special case?

Possible values of the determinant for matrices with elements $\{1, 0, -1\}$

Dual norm of a subspace of $\ell_\infty^3$

Find the determinant of a matrix given the determinant of all $p\times p$ sub-matrices?

When does a finite metric induce a matrix norm?

Video lectures of mathematics courses available online for free

Operation including tensor product or Kronecker product transforming matrix $A$ into matrix $B$

rank of a linear combination of matrices

Is there a name for this type of matrix?

Tensor product of positive linear maps is positive

limit of vector sequence is in range of limit of matrix sequence

Complexity of solving $\sum_i A_i X B_i = C$

Is the set of two-qubit absolutely separable states convex, and if so, what are its John ellipsoids?

Computing $(AA\otimes BB + AB \otimes BA)^{-1}$

Square root of doubly positive symmetric matrices

Linear algebra underlying quantum entanglement?

Necessary conditions for the existence of solution of Sylvester equation AX=XB

Positive-semidefiniteness of a Gram-like matrix

Limit of alternated row and column normalizations

Operator norm of square root of matrix vs original