Triangular ring $\begin{bmatrix}\mathbb Q& k\\ 0& k\end{bmatrix}$ where $k$ is the field of constructible numbers.
Keywords triangular ring
| Name | Measure | |
|---|---|---|
| cardinality | $\aleph_0$ | |
| composition length | left: $\infty$ | right: 3 |
| Krull dimension (classical) | 0 |
| Name | Description |
|---|---|
| Left singular ideal | $\{0\}$ |
| Right singular ideal | $\{0\}$ |