Properties

Label 2005.42
Modulus $2005$
Conductor $2005$
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(2005, base_ring=CyclotomicField(400))
 
M = H._module
 
chi = DirichletCharacter(H, M([100,89]))
 
pari: [g,chi] = znchar(Mod(42,2005))
 

Basic properties

Modulus: \(2005\)
Conductor: \(2005\)
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 2005.by

\(\chi_{2005}(12,\cdot)\) \(\chi_{2005}(13,\cdot)\) \(\chi_{2005}(23,\cdot)\) \(\chi_{2005}(37,\cdot)\) \(\chi_{2005}(42,\cdot)\) \(\chi_{2005}(62,\cdot)\) \(\chi_{2005}(67,\cdot)\) \(\chi_{2005}(87,\cdot)\) \(\chi_{2005}(117,\cdot)\) \(\chi_{2005}(122,\cdot)\) \(\chi_{2005}(137,\cdot)\) \(\chi_{2005}(152,\cdot)\) \(\chi_{2005}(163,\cdot)\) \(\chi_{2005}(187,\cdot)\) \(\chi_{2005}(192,\cdot)\) \(\chi_{2005}(193,\cdot)\) \(\chi_{2005}(207,\cdot)\) \(\chi_{2005}(208,\cdot)\) \(\chi_{2005}(217,\cdot)\) \(\chi_{2005}(238,\cdot)\) \(\chi_{2005}(297,\cdot)\) \(\chi_{2005}(347,\cdot)\) \(\chi_{2005}(367,\cdot)\) \(\chi_{2005}(378,\cdot)\) \(\chi_{2005}(388,\cdot)\) \(\chi_{2005}(418,\cdot)\) \(\chi_{2005}(428,\cdot)\) \(\chi_{2005}(447,\cdot)\) \(\chi_{2005}(453,\cdot)\) \(\chi_{2005}(467,\cdot)\) ...

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

\((402,1206)\) → \((i,e\left(\frac{89}{400}\right))\)

First values

\(a\) \(-1\)\(1\)\(2\)\(3\)\(4\)\(6\)\(7\)\(8\)\(9\)\(11\)\(12\)\(13\)
\( \chi_{ 2005 }(42, a) \) \(1\)\(1\)\(e\left(\frac{7}{200}\right)\)\(e\left(\frac{389}{400}\right)\)\(e\left(\frac{7}{100}\right)\)\(e\left(\frac{3}{400}\right)\)\(e\left(\frac{9}{200}\right)\)\(e\left(\frac{21}{200}\right)\)\(e\left(\frac{189}{200}\right)\)\(e\left(\frac{33}{200}\right)\)\(e\left(\frac{17}{400}\right)\)\(e\left(\frac{291}{400}\right)\)
sage: chi.jacobi_sum(n)
 
\( \chi_{ 2005 }(42,a) \;\) at \(\;a = \) e.g. 2