Properties

Label 261.103
Modulus $261$
Conductor $261$
Order $21$
Real no
Primitive yes
Minimal yes
Parity even

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Show commands: PariGP / SageMath
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(261, base_ring=CyclotomicField(42))
 
M = H._module
 
chi = DirichletCharacter(H, M([14,6]))
 
pari: [g,chi] = znchar(Mod(103,261))
 

Basic properties

Modulus: \(261\)
Conductor: \(261\)
sage: chi.conductor()
 
pari: znconreyconductor(g,chi)
 
Order: \(21\)
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 261.q

\(\chi_{261}(7,\cdot)\) \(\chi_{261}(16,\cdot)\) \(\chi_{261}(25,\cdot)\) \(\chi_{261}(49,\cdot)\) \(\chi_{261}(52,\cdot)\) \(\chi_{261}(94,\cdot)\) \(\chi_{261}(103,\cdot)\) \(\chi_{261}(112,\cdot)\) \(\chi_{261}(139,\cdot)\) \(\chi_{261}(169,\cdot)\) \(\chi_{261}(223,\cdot)\) \(\chi_{261}(256,\cdot)\)

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: \(\Q(\zeta_{21})\)
Fixed field: Number field defined by a degree 21 polynomial

Values on generators

\((146,118)\) → \((e\left(\frac{1}{3}\right),e\left(\frac{1}{7}\right))\)

First values

\(a\) \(-1\)\(1\)\(2\)\(4\)\(5\)\(7\)\(8\)\(10\)\(11\)\(13\)\(14\)\(16\)
\( \chi_{ 261 }(103, a) \) \(1\)\(1\)\(e\left(\frac{10}{21}\right)\)\(e\left(\frac{20}{21}\right)\)\(e\left(\frac{17}{21}\right)\)\(e\left(\frac{1}{21}\right)\)\(e\left(\frac{3}{7}\right)\)\(e\left(\frac{2}{7}\right)\)\(e\left(\frac{19}{21}\right)\)\(e\left(\frac{5}{21}\right)\)\(e\left(\frac{11}{21}\right)\)\(e\left(\frac{19}{21}\right)\)
sage: chi.jacobi_sum(n)
 
\( \chi_{ 261 }(103,a) \;\) at \(\;a = \) e.g. 2

Gauss sum

sage: chi.gauss_sum(a)
 
pari: znchargauss(g,chi,a)
 
\( \tau_{ a }( \chi_{ 261 }(103,·) )\;\) at \(\;a = \) e.g. 2

Jacobi sum

sage: chi.jacobi_sum(n)
 
\( J(\chi_{ 261 }(103,·),\chi_{ 261 }(n,·)) \;\) for \( \; n = \) e.g. 1

Kloosterman sum

sage: chi.kloosterman_sum(a,b)
 
\(K(a,b,\chi_{ 261 }(103,·)) \;\) at \(\; a,b = \) e.g. 1,2