$M_{nn}$ Simple algebra
38817
Why is the ring of matrices over a field simple?
107594
Lie bracket for Lie algebra of $SO(n,m)$
117737
Why is $\mathfrak{sl}(n)$ the algebra of traceless matrices?
111786
for any ring $A$ the matrix ring $M_n(A)$ is simple if and only if $A$ is simple
41294
Permutation module of $S_n$
105363
$\mathbb Z^n/\langle (a,...,a) \rangle \cong \mathbb Z^{n-1} \oplus \mathbb Z/\langle a \rangle$
88124
$M,N\in \Bbb R ^{n\times n}$, show that $e^{(M+N)} = e^{M}e^N$ given $MN=NM$
122580
If N is elementary nilpotent matrix, show that N Transpose is similar to N
70861
$\mathbb P^n\times \mathbb P^m\not\cong \mathbb P^{m+n}$
3203
Quotient group $\mathbb Z^n/\ \text{im}(A)$
43990
R is a commutative ring with $1\ne 0$ and $R^m \cong R^n$, then $m=n$
78298
On the nilpotence of the matrix $AB-BA$
8417
Natural $(R/I)$-module structure for an $R$-module $M$ annihilated by $I$
115414
Lie Algebra of $SL_n(\mathbb H)$
72640
$(m,n) = (\gcd(m,n))$ as ideals in $\Bbb Z$
119452
Nilpotent matrices with same minimal polynomial and nullity
71822
Commutator algebra in exponents