D4 puntgroep
niet-Abels, 5(6) niet-reduceerbare representatiesSubgroepen van de D4 puntgroep: C2, C4, D2
Karaktertabel van de D4 puntgroep
| E | 2C4 (z) | C2 (z) | 2C'2 | 2C''2 | linear functions, rotations | quadratic functions | |
|---|---|---|---|---|---|---|---|
| A1 | 1 | 1 | 1 | 1 | 1 | x2+y2, z2 | |
| A2 | 1 | 1 | 1 | -1 | -1 | z, Rz | |
| B1 | 1 | -1 | 1 | 1 | -1 | x2-y2 | |
| B2 | 1 | -1 | 1 | -1 | 1 | xy | |
| E | 2 | 0 | -2 | 0 | 0 | (x, y) (Rx, Ry) | (xz, yz) |
Vermenigvuldigingstabel voor D4 puntgroep
| A1 | A2 | B1 | B2 | E | |
|---|---|---|---|---|---|
| A1 | A1 | A2 | B1 | B2 | E |
| A2 | A2 | A1 | B2 | B1 | E |
| B1 | B1 | B2 | A1 | A2 | E |
| B2 | B2 | B1 | A2 | A1 | E |
| E | E | E | E | E | A1+A2+B1+B2 |
| C1 | Cs | Ci | ||
| C2 | C3 | C4 | C5 | C6 |
| C2v | C3v | C4v | C5v | C6v |
| C2h | C3h | C4h | C5h | C6h |
| D2 | D3 | D4 | D5 | D6 |
| D2h | D3h | D4h | D5h | D6h |
| D2d | D3d | D4d | D5d | D6d |
| S4 | S6 | S8 | S10 | |
| Td | Oh | Ih | ||
| C∞v | D∞h |
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