Basic invariants
| Dimension: | $3$ |
| Group: | $A_5$ |
| Conductor: | \(210681\)\(\medspace = 3^{6} \cdot 17^{2} \) |
| Frobenius-Schur indicator: | $1$ |
| Root number: | $1$ |
| Artin stem field: | Galois closure of 5.1.210681.1 |
| Galois orbit size: | $2$ |
| Smallest permutation container: | $A_5$ |
| Parity: | even |
| Determinant: | 1.1.1t1.a.a |
| Projective image: | $A_5$ |
| Projective stem field: | Galois closure of 5.1.210681.1 |
Defining polynomial
| $f(x)$ | $=$ |
\( x^{5} - 2x^{4} + 4x^{3} - 5x^{2} + 4x - 5 \)
|
The roots of $f$ are computed in an extension of $\Q_{ 7 }$ to precision 5.
Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 7 }$:
\( x^{2} + 6x + 3 \)
Roots:
| $r_{ 1 }$ | $=$ |
\( 5 a + 4 + \left(a + 4\right)\cdot 7 + \left(a + 6\right)\cdot 7^{3} + 4 a\cdot 7^{4} +O(7^{5})\)
|
| $r_{ 2 }$ | $=$ |
\( a + 5 + \left(5 a + 2\right)\cdot 7 + 6\cdot 7^{2} + \left(5 a + 1\right)\cdot 7^{3} + 7^{4} +O(7^{5})\)
|
| $r_{ 3 }$ | $=$ |
\( 2 a + 2 + \left(5 a + 1\right)\cdot 7 + \left(6 a + 6\right)\cdot 7^{2} + \left(5 a + 6\right)\cdot 7^{3} + \left(2 a + 3\right)\cdot 7^{4} +O(7^{5})\)
|
| $r_{ 4 }$ | $=$ |
\( 6 + 5\cdot 7 + 5\cdot 7^{2} + 6\cdot 7^{3} + 3\cdot 7^{4} +O(7^{5})\)
|
| $r_{ 5 }$ | $=$ |
\( 6 a + 6 + \left(a + 6\right)\cdot 7 + \left(6 a + 1\right)\cdot 7^{2} + \left(a + 6\right)\cdot 7^{3} + \left(6 a + 3\right)\cdot 7^{4} +O(7^{5})\)
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Generators of the action on the roots $r_1, \ldots, r_{ 5 }$
| Cycle notation |
Character values on conjugacy classes
| Size | Order | Action on $r_1, \ldots, r_{ 5 }$ | Character value | Complex conjugation |
| $1$ | $1$ | $()$ | $3$ | |
| $15$ | $2$ | $(1,2)(3,4)$ | $-1$ | ✓ |
| $20$ | $3$ | $(1,2,3)$ | $0$ | |
| $12$ | $5$ | $(1,2,3,4,5)$ | $-\zeta_{5}^{3} - \zeta_{5}^{2}$ | |
| $12$ | $5$ | $(1,3,4,5,2)$ | $\zeta_{5}^{3} + \zeta_{5}^{2} + 1$ |