sage: from dirichlet_conrey import DirichletGroup_conrey # requires nonstandard Sage package to be installed
sage: H = DirichletGroup_conrey(20)
sage: chi = H[7]
pari: [g,chi] = znchar(Mod(7,20))
Basic properties
| sage: chi.conductor()
pari: znconreyconductor(g,chi)
| ||
| Conductor | = | 20 |
| sage: chi.multiplicative_order()
pari: charorder(g,chi)
| ||
| Order | = | 4 |
| Real | = | no |
| sage: chi.is_primitive()
pari: #znconreyconductor(g,chi)==1 \\ if not primitive returns [cond,factorization]
| ||
| Primitive | = | yes |
| Minimal | = | yes |
| sage: chi.is_odd()
pari: zncharisodd(g,chi)
| ||
| Parity | = | even |
| Orbit label | = | 20.e |
| Orbit index | = | 5 |
Galois orbit
sage: chi.sage_character().galois_orbit()
pari: order = charorder(g,chi)
pari: [ charpow(g,chi, k % order) | k <-[1..order-1], gcd(k,order)==1 ]
\(\chi_{20}(3,\cdot)\) \(\chi_{20}(7,\cdot)\)
Values on generators
\((11,17)\) → \((-1,i)\)
Values
| -1 | 1 | 3 | 7 | 9 | 11 | 13 | 17 |
| \(1\) | \(1\) | \(i\) | \(-i\) | \(-1\) | \(-1\) | \(-i\) | \(i\) |
Related number fields
| Field of values | \(\Q(i)\) |
Gauss sum
sage: chi.sage_character().gauss_sum(a)
pari: znchargauss(g,chi,a)
\(\displaystyle \tau_{2}(\chi_{20}(7,\cdot)) = \sum_{r\in \Z/20\Z} \chi_{20}(7,r) e\left(\frac{r}{10}\right) = -0.0 \)
Jacobi sum
sage: chi.sage_character().jacobi_sum(n)
\( \displaystyle J(\chi_{20}(7,\cdot),\chi_{20}(1,\cdot)) = \sum_{r\in \Z/20\Z} \chi_{20}(7,r) \chi_{20}(1,1-r) = 0 \)
Kloosterman sum
sage: chi.sage_character().kloosterman_sum(a,b)
\( \displaystyle K(1,2,\chi_{20}(7,·))
= \sum_{r \in \Z/20\Z}
\chi_{20}(7,r) e\left(\frac{1 r + 2 r^{-1}}{20}\right)
= 2.3511410092+2.3511410092i \)