Given a matrix A, how to find  B such that AB=BA
121062
Given a matrix, is there always another matrix which commutes with it?
105921
Why do we have $ab=ba$?
139201
Finding Jordan basis of a matrix $(4\times 4)$
62614
How to get matrix $A$ from $A^\top A=B$ with given symmetric matrix $b$?
85297
find a $3 \times 3$ matrix $A$ such that $A \neq I_3$ and $A^{197}=I_3$.
147490
If matrix $AB=A$, does it mean B must be an identity matrix?
7622
$AB-BA=I$ having no solutions
105873
Construct an algorithm to find the multiple of A such that A%B is maximized
73155
Prove that for any square matrix, an invertible matrix B exists, so that BA is triangular
145980
For every matrix $A\in M_{2}( \mathbb{C}) $ there's  $X\in M_{2}( \mathbb{C})$ such that $X^2=A$?
158724
Show that $B$ is diagonalizable if If $AB=BA$ and $A$ has distinct real eigenvalues
79
Find $a$, $b$ and $c$ that satisfy the following equations
110408
Solving for $A$ in $Ax = b$
140252
Matrices - Conditions for $AB+BA=0$
49330
If for two suitable matrices $B$ and $C$, $AA^TB=AA^TC$ can we conclude that $A^TB=A^TC$?
8638
If I know $AB$, how can I calculate $BA$?
156438
Find a matrix equation equivalent to $A^TPA+P=I$