Center of matrices over a field
4280
A linear operator commuting with all such operators is a scalar multiple of the identity.
59202
What is the angle between those two matrices over $\mathbb{C}$?
115182
Centre of symmetric group algebra
34759
Name of a special matrix
25357
Matrices $B$ that commute with every matrix commuting with $A$
87451
Construction of matrices under ZFC axioms
138672
Finding Ideals in $\begin{bmatrix} \mathbb{Q} & \mathbb{Q}\\ 0 & 0 \end{bmatrix}$
108850
Complex matrix that commutes with another complex matrix.
111911
Dimensions of symmetric and skew-symmetric matrices
129476
The trace map in a finite field.
87636
A Product function for matrix products
27689
Separability over intersection of intermediate fields
136142
Is division of matrices possible?
130720
Special linear algebra over finite field with characteristic 3
123044
Commutative matrices are multiples of the identity
125647
Solutions to the matrix equation $\mathbf{AB-BA=I}$ over general fields
138410
Centralizer of $\mathbb{C}[G]$ in $\mathbb{C}[H]$