sage: from sage.modular.dirichlet import DirichletCharacter
sage: H = DirichletGroup(38, base_ring=CyclotomicField(18))
sage: M = H._module
sage: chi = DirichletCharacter(H, M([13]))
pari: [g,chi] = znchar(Mod(3,38))
Basic properties
| Modulus: | \(38\) | |
| Conductor: | \(19\) | sage: chi.conductor()
pari: znconreyconductor(g,chi)
|
| Order: | \(18\) | sage: chi.multiplicative_order()
pari: charorder(g,chi)
|
| Real: | no | |
| Primitive: | no, induced from \(\chi_{19}(3,\cdot)\) | sage: chi.is_primitive()
pari: #znconreyconductor(g,chi)==1
|
| Minimal: | yes | |
| Parity: | odd | sage: chi.is_odd()
pari: zncharisodd(g,chi)
|
Galois orbit 38.f
\(\chi_{38}(3,\cdot)\) \(\chi_{38}(13,\cdot)\) \(\chi_{38}(15,\cdot)\) \(\chi_{38}(21,\cdot)\) \(\chi_{38}(29,\cdot)\) \(\chi_{38}(33,\cdot)\)
sage: chi.galois_orbit()
pari: order = charorder(g,chi)
pari: [ charpow(g,chi, k % order) | k <-[1..order-1], gcd(k,order)==1 ]
Values on generators
\(21\) → \(e\left(\frac{13}{18}\right)\)
Values
| \(-1\) | \(1\) | \(3\) | \(5\) | \(7\) | \(9\) | \(11\) | \(13\) | \(15\) | \(17\) | \(21\) | \(23\) |
| \(-1\) | \(1\) | \(e\left(\frac{7}{18}\right)\) | \(e\left(\frac{5}{9}\right)\) | \(e\left(\frac{1}{3}\right)\) | \(e\left(\frac{7}{9}\right)\) | \(e\left(\frac{2}{3}\right)\) | \(e\left(\frac{11}{18}\right)\) | \(e\left(\frac{17}{18}\right)\) | \(e\left(\frac{2}{9}\right)\) | \(e\left(\frac{13}{18}\right)\) | \(e\left(\frac{4}{9}\right)\) |
Related number fields
| Field of values: | \(\Q(\zeta_{9})\) |
| Fixed field: | \(\Q(\zeta_{19})\) |
Gauss sum
sage: chi.gauss_sum(a)
pari: znchargauss(g,chi,a)
\(\displaystyle \tau_{2}(\chi_{38}(3,\cdot)) = \sum_{r\in \Z/38\Z} \chi_{38}(3,r) e\left(\frac{r}{19}\right) = -2.7996661877+-3.3409383767i \)
Jacobi sum
sage: chi.jacobi_sum(n)
\( \displaystyle J(\chi_{38}(3,\cdot),\chi_{38}(1,\cdot)) = \sum_{r\in \Z/38\Z} \chi_{38}(3,r) \chi_{38}(1,1-r) = 0 \)
Kloosterman sum
sage: chi.kloosterman_sum(a,b)
\( \displaystyle K(1,2,\chi_{38}(3,·))
= \sum_{r \in \Z/38\Z}
\chi_{38}(3,r) e\left(\frac{1 r + 2 r^{-1}}{38}\right)
= 5.0197514099+4.2120715567i \)