Properties

Label 1728.25
Modulus $1728$
Conductor $864$
Order $72$
Real no
Primitive no
Minimal no
Parity even

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Show commands: PariGP / SageMath
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1728, base_ring=CyclotomicField(72))
 
M = H._module
 
chi = DirichletCharacter(H, M([0,9,40]))
 
pari: [g,chi] = znchar(Mod(25,1728))
 

Basic properties

Modulus: \(1728\)
Conductor: \(864\)
sage: chi.conductor()
 
pari: znconreyconductor(g,chi)
 
Order: \(72\)
sage: chi.multiplicative_order()
 
pari: charorder(g,chi)
 
Real: no
Primitive: no, induced from \(\chi_{864}(133,\cdot)\)
sage: chi.is_primitive()
 
pari: #znconreyconductor(g,chi)==1
 
Minimal: no
Parity: even
sage: chi.is_odd()
 
pari: zncharisodd(g,chi)
 

Galois orbit 1728.cc

\(\chi_{1728}(25,\cdot)\) \(\chi_{1728}(121,\cdot)\) \(\chi_{1728}(169,\cdot)\) \(\chi_{1728}(265,\cdot)\) \(\chi_{1728}(313,\cdot)\) \(\chi_{1728}(409,\cdot)\) \(\chi_{1728}(457,\cdot)\) \(\chi_{1728}(553,\cdot)\) \(\chi_{1728}(601,\cdot)\) \(\chi_{1728}(697,\cdot)\) \(\chi_{1728}(745,\cdot)\) \(\chi_{1728}(841,\cdot)\) \(\chi_{1728}(889,\cdot)\) \(\chi_{1728}(985,\cdot)\) \(\chi_{1728}(1033,\cdot)\) \(\chi_{1728}(1129,\cdot)\) \(\chi_{1728}(1177,\cdot)\) \(\chi_{1728}(1273,\cdot)\) \(\chi_{1728}(1321,\cdot)\) \(\chi_{1728}(1417,\cdot)\) \(\chi_{1728}(1465,\cdot)\) \(\chi_{1728}(1561,\cdot)\) \(\chi_{1728}(1609,\cdot)\) \(\chi_{1728}(1705,\cdot)\)

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: $\Q(\zeta_{72})$
Fixed field: Number field defined by a degree 72 polynomial

Values on generators

\((703,325,1217)\) → \((1,e\left(\frac{1}{8}\right),e\left(\frac{5}{9}\right))\)

First values

\(a\) \(-1\)\(1\)\(5\)\(7\)\(11\)\(13\)\(17\)\(19\)\(23\)\(25\)\(29\)\(31\)
\( \chi_{ 1728 }(25, a) \) \(1\)\(1\)\(e\left(\frac{65}{72}\right)\)\(e\left(\frac{5}{36}\right)\)\(e\left(\frac{61}{72}\right)\)\(e\left(\frac{23}{72}\right)\)\(e\left(\frac{5}{6}\right)\)\(e\left(\frac{13}{24}\right)\)\(e\left(\frac{31}{36}\right)\)\(e\left(\frac{29}{36}\right)\)\(e\left(\frac{67}{72}\right)\)\(e\left(\frac{1}{9}\right)\)
sage: chi.jacobi_sum(n)
 
\( \chi_{ 1728 }(25,a) \;\) at \(\;a = \) e.g. 2