Matrix with trace zero
114250
If $V_0$ is the subspace of matrices of the form $C=AB-BA$ for some $A,B$ in a vector space $V$ then $V_0=\{A\in V|\operatorname{Trace} (A)=0\}$
26386
How to estimate the matrix condition number in the 2-Norm?
129743
$A$ be a $2\times 2$ real matrix with trace $2$ and determinant $-3$
120407
Is every noninvertible matrix a zero divisor?
13948
Matrix in a matrix
33560
Show that matrices $A$ and $B$ commute if and only if $\begin{vmatrix} b & a-c \\ e & d-f\end{vmatrix}=0.$
122951
If the $\det(A)=0$ why does the matrix $A$ have an eigenvector?
127799
Eigenvalues of symmetric matrices are real without (!) complex numbers
120937
Matrices that commute with all matrices
46128
Representation of Matrix with Rank 1
22222
Properties of zero-diagonal symmetric matrices
30037
What information does the trace of a matrix give?
43570
Finding two non-zero matrices where $AX = BA$
55159
Find all matrices that commute with given matrix
133758
Traces of powers of a matrix $A$ over an algebra are zero implies $A$ nilpotent.
98541
If a Matrix Has Only Zero as an Eigen-Value Then It Is Nilpotent
74441
Zero divisors in matrix rings