Question involving triangular matrices and simple modules.
108975
The simple modules of upper triangular matrix algebras.
151251
A simple algebra that is not semisimple
4652
Is $V$ a simple $\text{End}_kV$-module?
100303
A necessary and sufficient condition for $A\cap(B+C)=(A\cap B)+C$ to hold for submodules
41294
Permutation module of $S_n$
35247
The characteristic and minimal polynomial of a companion matrix
8417
Natural $(R/I)$-module structure for an $R$-module $M$ annihilated by $I$
15417
Tricky problem on skew-symmetric matrices
43570
Finding two non-zero matrices where $AX = BA$
50404
How to prove a matrix is nilpotent?
82020
basic linear algebra question, proving it is a diagonal matrix and scalar matrix.
47589
Product of a primitive matrix and its transpose.
89047
If a matrix is triangular, is there a quicker way to tell if it is can be diagonalized?
31029
Characteristic polynomial of a matrix of $1$'s
39657
Strictly Upper Triangular $n\times n$ Matrices form a Nilpotent Lie Algebra over $\mathbb{C}$ for $n\geq 2$
44898
Help with commutative property of matrices problem
152721
Help showing $H_n=\sum_{h \in H}h \in F[H]$ is a simple submodule