The ring of n×n matrices over a finite field F whose entries below the diagonal are all zero.
Keywords matrix ring
| Name | Measure | |
|---|---|---|
| cardinality | qn(n+1)/2 | |
| composition length | left: n(n+1)/2 | right: n(n+1)/2 |
| global dimension | left: 1 | right: 1 |
| Krull dimension (classical) | 0 |
| Name | Description |
|---|---|
| Left singular ideal | {0} |
| Right singular ideal | {0} |