Description: Let $A=\mathbb Z/(4)$ and $B=(2)/(4)$ be that ideal in $A$. $R$ is the triangular ring $\begin{bmatrix}A&B\\ 0&A \end{bmatrix}$

Notes:

Keywords triangular ring

Reference(s):

This ring has the following properties:

$\pi$-regular
ACC annihilator (left)
ACC annihilator (right)
ACC principal (left)
ACC principal (right)
Artinian (left)
Artinian (right)
clean
coherent (left)
coherent (right)
cohopfian (left)
cohopfian (right)
DCC annihilator (left)
DCC annihilator (right)
Dedekind finite
essential socle (left)
essential socle (right)
exchange
finite
finite uniform dimension (left)
finite uniform dimension (right)
finitely cogenerated (left)
finitely cogenerated (right)
finitely generated socle (left)
finitely generated socle (right)
Goldie (left)
Goldie (right)
I_0
IBN
Kasch (left)
Kasch (right)
lift/rad
nil radical
nilpotent radical
Noetherian (left)
Noetherian (right)
nonzero socle (left)
nonzero socle (right)
orthogonally finite
perfect (left)
perfect (right)
quasi-duo (left)
quasi-duo (right)
semilocal
semiperfect
semiprimary
semiregular
stable range 1
stably finite
strongly $\pi$-regular
T-nilpotent radical (left)
T-nilpotent radical (right)
top regular
Zorn

The ring lacks the following properties:

Abelian
Baer
Bezout (left)
Bezout (right)
Bezout domain (left)
Bezout domain (right)
cogenerator ring (left)
cogenerator ring (right)
commutative
connected
distributive (left)
distributive (right)
division ring
domain
duo (left)
duo (right)
FI-injective (left)
FI-injective (right)
finitely pseudo-Frobenius (left)
finitely pseudo-Frobenius (right)
free ideal ring (left)
free ideal ring (right)
Frobenius
fully prime
fully semiprime
hereditary (left)
hereditary (right)
local
nonsingular (left)
nonsingular (right)
Ore domain (left)
Ore domain (right)
primary
prime
primitive (left)
primitive (right)
principal ideal domain (left)
principal ideal domain (right)
principal ideal ring (left)
principal ideal ring (right)
principally injective (left)
principally injective (right)
pseudo-Frobenius (left)
pseudo-Frobenius (right)
quasi-Frobenius
reduced
reversible
Rickart (left)
Rickart (right)
self-injective (left)
self-injective (right)
semi free ideal ring
semihereditary (left)
semihereditary (right)
semiprime
semiprimitive
semisimple
simple
simple Artinian
simple socle (left)
simple socle (right)
strongly regular
symmetric
top simple
top simple Artinian
uniform (left)
uniform (right)
unit regular
V ring (left)
V ring (right)
valuation ring (left)
valuation ring (right)
von Neumann regular

We don't know if the ring has or lacks the following properties: