New posts in matrices

Use row reductions to show $det(T)=0$

linear-algebra matrices determinant

Probability of determinants being coprime

probability matrices analytic-number-theory determinant

Correct name for multi-dimensional array/matrix/tensor

matrices terminology tensors

Definition of positive definite operator in infinite dimensional space

matrices functional-analysis

Gradient of squared Frobenius norm

matrices derivatives normed-spaces

intuition behind cyclicality of the trace?

matrices intuition

Relate the singular values of $A$ and $\frac{A^T+A}{2}$

linear-algebra matrices

How to show that $(Re\lambda_1,\dotsb,Re\lambda_n)^T$ is majorized by $(\lambda_1(H),\dotsb,\lambda_n(H))^T$?

matrices hermitian-matrices

Notation for the ith row and column of a matrix

matrices notation vectors

Searching two matrix A and B, such that exp(A+B)=exp(A)exp(B) but AB is not equal to BA. [duplicate]

matrices exponential-function functional-calculus

How to rotate a matrix by 45 degrees?

linear-algebra matrices rotations

Monotone matrix

linear-algebra matrices

For every *non-square* matrix prove that $AA^t$ or/and $A^tA$ is singular

linear-algebra matrices transpose

On an operator norm inequality for two triangular matrices

linear-algebra matrices

Is every square traceless matrix unitarily similar to a zero-diagonal matrix?

linear-algebra matrices

Find the value of k, (if any), for which the system below has unique, infinite or no solution. [duplicate]

linear-algebra matrices systems-of-equations

Cholesky decomposition in positive semi-definite matrix

linear-algebra matrices positive-semidefinite cholesky-decomposition

Find and classify the critical points of the system $x'=2-xy, y'=2x-y$

matrices ordinary-differential-equations

How to tell is a matrix is a covariance matrix?

probability matrices covariance

Equivalence of skew-symmetric matrices

linear-algebra matrices permutations skew-symmetric-matrices