from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(15, base_ring=CyclotomicField(4))
M = H._module
chi = DirichletCharacter(H, M([2,1]))
pari: [g,chi] = znchar(Mod(2,15))
Basic properties
| Modulus: | \(15\) | |
| Conductor: | \(15\) | sage: chi.conductor()
pari: znconreyconductor(g,chi)
|
| Order: | \(4\) | sage: chi.multiplicative_order()
pari: charorder(g,chi)
|
| Real: | no | |
| Primitive: | yes | sage: chi.is_primitive()
pari: #znconreyconductor(g,chi)==1
|
| Minimal: | yes | |
| Parity: | even | sage: chi.is_odd()
pari: zncharisodd(g,chi)
|
Galois orbit 15.e
\(\chi_{15}(2,\cdot)\) \(\chi_{15}(8,\cdot)\)
sage: chi.galois_orbit()
order = charorder(g,chi)
[ charpow(g,chi, k % order) | k <-[1..order-1], gcd(k,order)==1 ]
Related number fields
| Field of values: | \(\mathbb{Q}(i)\) |
| Fixed field: | \(\Q(\zeta_{15})^+\) |
Values on generators
\((11,7)\) → \((-1,i)\)
Values
| \(a\) | \(-1\) | \(1\) | \(2\) | \(4\) | \(7\) | \(8\) | \(11\) | \(13\) |
| \( \chi_{ 15 }(2, a) \) | \(1\) | \(1\) | \(-i\) | \(-1\) | \(i\) | \(i\) | \(-1\) | \(-i\) |
sage: chi.jacobi_sum(n)
Gauss sum
sage: chi.gauss_sum(a)
pari: znchargauss(g,chi,a)
Jacobi sum
sage: chi.jacobi_sum(n)
Kloosterman sum
sage: chi.kloosterman_sum(a,b)