ideals of a matrix ring?
138672
Finding Ideals in $\begin{bmatrix} \mathbb{Q} & \mathbb{Q}\\ 0 & 0 \end{bmatrix}$
137450
Two-sided ideal generated by subset of not commutative ring
587
Ideal Generated by the Union of Two Ideals
116883
About ideals in a ring which is a $k$ vector space
93723
Find all the maximal ideals in the ring $\mathbb{R}[x]$.
133706
If R is a local ring, then its maximal left-ideal is a left and right ideal
77382
Left ideals of $M_n(K)$
124646
Understanding the ideal $IJ$ in $R$
29019
Ideals in direct product of rings
83115
A set of elements in a reduced unity ring
17239
Find all ideals of ${\mathbb{Z}_n}$
111786
for any ring $A$ the matrix ring $M_n(A)$ is simple if and only if $A$ is simple
135699
Questions about a commutative ring with exactly three ideals
29600
What is true for a ring with exactly two right ideals
31585
Primary ideals of $\mathbb{Z}$
37393
$R$ is commutative, $I$,$J$ are ideals, $I+J=R$, then $IJ=I\cap J$
49875
Question on Comaximal Ideals