# Properties

 Modulus 181 Conductor 181 Order 90 Real no Primitive yes Minimal yes Parity even Orbit label 181.q

# Related objects

Show commands for: Pari/GP / SageMath
sage: from sage.modular.dirichlet import DirichletCharacter

sage: H = DirichletGroup(181)

sage: M = H._module

sage: chi = DirichletCharacter(H, M([13]))

pari: [g,chi] = znchar(Mod(37,181))

## Basic properties

 sage: chi.conductor()  pari: znconreyconductor(g,chi) Modulus = 181 Conductor = 181 sage: chi.multiplicative_order()  pari: charorder(g,chi) Order = 90 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 = 181.q Orbit index = 17

## Galois orbit

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

$$2$$ → $$e\left(\frac{13}{90}\right)$$

## Values

 -1 1 2 3 4 5 6 7 8 9 10 11 $$1$$ $$1$$ $$e\left(\frac{13}{90}\right)$$ $$e\left(\frac{4}{45}\right)$$ $$e\left(\frac{13}{45}\right)$$ $$e\left(\frac{8}{15}\right)$$ $$e\left(\frac{7}{30}\right)$$ $$e\left(\frac{1}{6}\right)$$ $$e\left(\frac{13}{30}\right)$$ $$e\left(\frac{8}{45}\right)$$ $$e\left(\frac{61}{90}\right)$$ $$e\left(\frac{43}{45}\right)$$
value at  e.g. 2

## Related number fields

 Field of values $$\Q(\zeta_{45})$$

## Gauss sum

sage: chi.gauss_sum(a)

pari: znchargauss(g,chi,a)

$$\tau_{ a }( \chi_{ 181 }(37,·) )\;$$ at $$\;a =$$ e.g. 2
$$\displaystyle \tau_{2}(\chi_{181}(37,\cdot)) = \sum_{r\in \Z/181\Z} \chi_{181}(37,r) e\left(\frac{2r}{181}\right) = 3.6607410852+12.9460022674i$$

## Jacobi sum

sage: chi.jacobi_sum(n)

$$J(\chi_{ 181 }(37,·),\chi_{ 181 }(n,·)) \;$$ for $$\; n =$$ e.g. 1
$$\displaystyle J(\chi_{181}(37,\cdot),\chi_{181}(1,\cdot)) = \sum_{r\in \Z/181\Z} \chi_{181}(37,r) \chi_{181}(1,1-r) = -1$$

## Kloosterman sum

sage: chi.kloosterman_sum(a,b)

$$K(a,b,\chi_{ 181 }(37,·)) \;$$ at $$\; a,b =$$ e.g. 1,2
$$\displaystyle K(1,2,\chi_{181}(37,·)) = \sum_{r \in \Z/181\Z} \chi_{181}(37,r) e\left(\frac{1 r + 2 r^{-1}}{181}\right) = -14.9017774248+-7.2680824777i$$