Properties

Label 245.27
Modulus $245$
Conductor $245$
Order $28$
Real no
Primitive yes
Minimal yes
Parity even

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Show commands: PariGP / SageMath
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(245, base_ring=CyclotomicField(28))
 
M = H._module
 
chi = DirichletCharacter(H, M([7,2]))
 
pari: [g,chi] = znchar(Mod(27,245))
 

Basic properties

Modulus: \(245\)
Conductor: \(245\)
sage: chi.conductor()
 
pari: znconreyconductor(g,chi)
 
Order: \(28\)
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 245.s

\(\chi_{245}(13,\cdot)\) \(\chi_{245}(27,\cdot)\) \(\chi_{245}(62,\cdot)\) \(\chi_{245}(83,\cdot)\) \(\chi_{245}(118,\cdot)\) \(\chi_{245}(132,\cdot)\) \(\chi_{245}(153,\cdot)\) \(\chi_{245}(167,\cdot)\) \(\chi_{245}(188,\cdot)\) \(\chi_{245}(202,\cdot)\) \(\chi_{245}(223,\cdot)\) \(\chi_{245}(237,\cdot)\)

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: \(\Q(\zeta_{28})\)
Fixed field: Number field defined by a degree 28 polynomial

Values on generators

\((197,101)\) → \((i,e\left(\frac{1}{14}\right))\)

First values

\(a\) \(-1\)\(1\)\(2\)\(3\)\(4\)\(6\)\(8\)\(9\)\(11\)\(12\)\(13\)\(16\)
\( \chi_{ 245 }(27, a) \) \(1\)\(1\)\(e\left(\frac{3}{28}\right)\)\(e\left(\frac{23}{28}\right)\)\(e\left(\frac{3}{14}\right)\)\(e\left(\frac{13}{14}\right)\)\(e\left(\frac{9}{28}\right)\)\(e\left(\frac{9}{14}\right)\)\(e\left(\frac{6}{7}\right)\)\(e\left(\frac{1}{28}\right)\)\(e\left(\frac{3}{28}\right)\)\(e\left(\frac{3}{7}\right)\)
sage: chi.jacobi_sum(n)
 
\( \chi_{ 245 }(27,a) \;\) at \(\;a = \) e.g. 2

Gauss sum

sage: chi.gauss_sum(a)
 
pari: znchargauss(g,chi,a)
 
\( \tau_{ a }( \chi_{ 245 }(27,·) )\;\) at \(\;a = \) e.g. 2

Jacobi sum

sage: chi.jacobi_sum(n)
 
\( J(\chi_{ 245 }(27,·),\chi_{ 245 }(n,·)) \;\) for \( \; n = \) e.g. 1

Kloosterman sum

sage: chi.kloosterman_sum(a,b)
 
\(K(a,b,\chi_{ 245 }(27,·)) \;\) at \(\; a,b = \) e.g. 1,2