| Diagonalmatrix | Nominativ, Singular | nominative case, singular | |
| Diagonalmatrixe | Genitiv, Singular | genitive case, singular | |
| Diagonalmatrixen | Dativ, Singular | dative case, singular | |
| Diagonalmatrix(e)s | Akkusativ, Singular | accusative case, singular | |
| Diagonalmatrixer | Nominativ, Plural | nominative case, plural | |
| Diagonalmatrixern | Genitiv, Plural | genitive case, plural | |
| Diagonalmatrixn | Dativ, Plural | dative case, plural |