Properties

Label 1620.61
Modulus $1620$
Conductor $81$
Order $27$
Real no
Primitive no
Minimal yes
Parity even

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Show commands: PariGP / SageMath
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1620, base_ring=CyclotomicField(54))
 
M = H._module
 
chi = DirichletCharacter(H, M([0,52,0]))
 
pari: [g,chi] = znchar(Mod(61,1620))
 

Basic properties

Modulus: \(1620\)
Conductor: \(81\)
sage: chi.conductor()
 
pari: znconreyconductor(g,chi)
 
Order: \(27\)
sage: chi.multiplicative_order()
 
pari: charorder(g,chi)
 
Real: no
Primitive: no, induced from \(\chi_{81}(61,\cdot)\)
sage: chi.is_primitive()
 
pari: #znconreyconductor(g,chi)==1
 
Minimal: yes
Parity: even
sage: chi.is_odd()
 
pari: zncharisodd(g,chi)
 

Galois orbit 1620.bg

\(\chi_{1620}(61,\cdot)\) \(\chi_{1620}(121,\cdot)\) \(\chi_{1620}(241,\cdot)\) \(\chi_{1620}(301,\cdot)\) \(\chi_{1620}(421,\cdot)\) \(\chi_{1620}(481,\cdot)\) \(\chi_{1620}(601,\cdot)\) \(\chi_{1620}(661,\cdot)\) \(\chi_{1620}(781,\cdot)\) \(\chi_{1620}(841,\cdot)\) \(\chi_{1620}(961,\cdot)\) \(\chi_{1620}(1021,\cdot)\) \(\chi_{1620}(1141,\cdot)\) \(\chi_{1620}(1201,\cdot)\) \(\chi_{1620}(1321,\cdot)\) \(\chi_{1620}(1381,\cdot)\) \(\chi_{1620}(1501,\cdot)\) \(\chi_{1620}(1561,\cdot)\)

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: \(\Q(\zeta_{27})\)
Fixed field: Number field defined by a degree 27 polynomial

Values on generators

\((811,1541,1297)\) → \((1,e\left(\frac{26}{27}\right),1)\)

First values

\(a\) \(-1\)\(1\)\(7\)\(11\)\(13\)\(17\)\(19\)\(23\)\(29\)\(31\)\(37\)\(41\)
\( \chi_{ 1620 }(61, a) \) \(1\)\(1\)\(e\left(\frac{11}{27}\right)\)\(e\left(\frac{14}{27}\right)\)\(e\left(\frac{19}{27}\right)\)\(e\left(\frac{7}{9}\right)\)\(e\left(\frac{2}{9}\right)\)\(e\left(\frac{16}{27}\right)\)\(e\left(\frac{17}{27}\right)\)\(e\left(\frac{7}{27}\right)\)\(e\left(\frac{4}{9}\right)\)\(e\left(\frac{1}{27}\right)\)
sage: chi.jacobi_sum(n)
 
\( \chi_{ 1620 }(61,a) \;\) at \(\;a = \) e.g. 2