from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1980, base_ring=CyclotomicField(4))
M = H._module
chi = DirichletCharacter(H, M([2,2,1,2]))
pari: [g,chi] = znchar(Mod(1187,1980))
Basic properties
| Modulus: | \(1980\) | |
| Conductor: | \(660\) | sage: chi.conductor()
pari: znconreyconductor(g,chi)
|
| Order: | \(4\) | sage: chi.multiplicative_order()
pari: charorder(g,chi)
|
| Real: | no | |
| Primitive: | no, induced from \(\chi_{660}(527,\cdot)\) | sage: chi.is_primitive()
pari: #znconreyconductor(g,chi)==1
|
| Minimal: | yes | |
| Parity: | even | sage: chi.is_odd()
pari: zncharisodd(g,chi)
|
Galois orbit 1980.r
\(\chi_{1980}(1187,\cdot)\) \(\chi_{1980}(1583,\cdot)\)
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: | \(\Q(\sqrt{-1}) \) |
| Fixed field: | 4.4.2178000.1 |
Values on generators
\((991,1541,397,541)\) → \((-1,-1,i,-1)\)
First values
| \(a\) | \(-1\) | \(1\) | \(7\) | \(13\) | \(17\) | \(19\) | \(23\) | \(29\) | \(31\) | \(37\) | \(41\) | \(43\) |
| \( \chi_{ 1980 }(1187, a) \) | \(1\) | \(1\) | \(i\) | \(i\) | \(i\) | \(-1\) | \(-i\) | \(-1\) | \(-1\) | \(i\) | \(1\) | \(-i\) |
sage: chi.jacobi_sum(n)