Properties

Label 255.2
Modulus $255$
Conductor $255$
Order $8$
Real no
Primitive yes
Minimal yes
Parity even

Related objects

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Show commands: Pari/GP / SageMath
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(255, base_ring=CyclotomicField(8)) M = H._module chi = DirichletCharacter(H, M([4,2,7]))
 
Copy content pari:[g,chi] = znchar(Mod(2,255))
 

Basic properties

Modulus: \(255\)
Conductor: \(255\)
Copy content sage:chi.conductor()
 
Copy content pari:znconreyconductor(g,chi)
 
Order: \(8\)
Copy content sage:chi.multiplicative_order()
 
Copy content pari:charorder(g,chi)
 
Real: no
Primitive: yes
Copy content sage:chi.is_primitive()
 
Copy content pari:#znconreyconductor(g,chi)==1
 
Minimal: yes
Parity: even
Copy content sage:chi.is_odd()
 
Copy content pari:zncharisodd(g,chi)
 

Galois orbit 255.ba

\(\chi_{255}(2,\cdot)\) \(\chi_{255}(8,\cdot)\) \(\chi_{255}(32,\cdot)\) \(\chi_{255}(128,\cdot)\)

Copy content sage:chi.galois_orbit()
 
Copy content pari:order = charorder(g,chi) [ charpow(g,chi, k % order) | k <-[1..order-1], gcd(k,order)==1 ]
 

Related number fields

Field of values: \(\Q(\zeta_{8})\)
Fixed field: 8.8.519334883015625.2

Values on generators

\((86,52,241)\) → \((-1,i,e\left(\frac{7}{8}\right))\)

First values

\(a\) \(-1\)\(1\)\(2\)\(4\)\(7\)\(8\)\(11\)\(13\)\(14\)\(16\)\(19\)\(22\)
\( \chi_{ 255 }(2, a) \) \(1\)\(1\)\(1\)\(1\)\(e\left(\frac{7}{8}\right)\)\(1\)\(e\left(\frac{5}{8}\right)\)\(i\)\(e\left(\frac{7}{8}\right)\)\(1\)\(-i\)\(e\left(\frac{5}{8}\right)\)
Copy content sage:chi.jacobi_sum(n)
 
\( \chi_{ 255 }(2,a) \;\) at \(\;a = \) e.g. 2

Gauss sum

Copy content sage:chi.gauss_sum(a)
 
Copy content pari:znchargauss(g,chi,a)
 
\( \tau_{ a }( \chi_{ 255 }(2,·) )\;\) at \(\;a = \) e.g. 2

Jacobi sum

Copy content sage:chi.jacobi_sum(n)
 
\( J(\chi_{ 255 }(2,·),\chi_{ 255 }(n,·)) \;\) for \( \; n = \) e.g. 1

Kloosterman sum

Copy content sage:chi.kloosterman_sum(a,b)
 
\(K(a,b,\chi_{ 255 }(2,·)) \;\) at \(\; a,b = \) e.g. 1,2