Properties

Label 1601.5
Modulus $1601$
Conductor $1601$
Order $400$
Real no
Primitive yes
Minimal yes
Parity even

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Show commands: PariGP / SageMath
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1601, base_ring=CyclotomicField(400))
 
M = H._module
 
chi = DirichletCharacter(H, M([261]))
 
pari: [g,chi] = znchar(Mod(5,1601))
 

Basic properties

Modulus: \(1601\)
Conductor: \(1601\)
sage: chi.conductor()
 
pari: znconreyconductor(g,chi)
 
Order: \(400\)
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 1601.s

\(\chi_{1601}(2,\cdot)\) \(\chi_{1601}(5,\cdot)\) \(\chi_{1601}(8,\cdot)\) \(\chi_{1601}(20,\cdot)\) \(\chi_{1601}(21,\cdot)\) \(\chi_{1601}(38,\cdot)\) \(\chi_{1601}(51,\cdot)\) \(\chi_{1601}(58,\cdot)\) \(\chi_{1601}(62,\cdot)\) \(\chi_{1601}(80,\cdot)\) \(\chi_{1601}(81,\cdot)\) \(\chi_{1601}(84,\cdot)\) \(\chi_{1601}(91,\cdot)\) \(\chi_{1601}(95,\cdot)\) \(\chi_{1601}(106,\cdot)\) \(\chi_{1601}(125,\cdot)\) \(\chi_{1601}(128,\cdot)\) \(\chi_{1601}(138,\cdot)\) \(\chi_{1601}(151,\cdot)\) \(\chi_{1601}(152,\cdot)\) \(\chi_{1601}(155,\cdot)\) \(\chi_{1601}(158,\cdot)\) \(\chi_{1601}(187,\cdot)\) \(\chi_{1601}(197,\cdot)\) \(\chi_{1601}(200,\cdot)\) \(\chi_{1601}(204,\cdot)\) \(\chi_{1601}(210,\cdot)\) \(\chi_{1601}(221,\cdot)\) \(\chi_{1601}(232,\cdot)\) \(\chi_{1601}(269,\cdot)\) ...

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: $\Q(\zeta_{400})$
Fixed field: Number field defined by a degree 400 polynomial (not computed)

Values on generators

\(3\) → \(e\left(\frac{261}{400}\right)\)

First values

\(a\) \(-1\)\(1\)\(2\)\(3\)\(4\)\(5\)\(6\)\(7\)\(8\)\(9\)\(10\)\(11\)
\( \chi_{ 1601 }(5, a) \) \(1\)\(1\)\(e\left(\frac{93}{100}\right)\)\(e\left(\frac{261}{400}\right)\)\(e\left(\frac{43}{50}\right)\)\(e\left(\frac{21}{100}\right)\)\(e\left(\frac{233}{400}\right)\)\(e\left(\frac{7}{400}\right)\)\(e\left(\frac{79}{100}\right)\)\(e\left(\frac{61}{200}\right)\)\(e\left(\frac{7}{50}\right)\)\(e\left(\frac{13}{400}\right)\)
sage: chi.jacobi_sum(n)
 
\( \chi_{ 1601 }(5,a) \;\) at \(\;a = \) e.g. 2