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Properties

Label 81.31
Modulus $81$
Conductor $81$
Order $27$
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(81, base_ring=CyclotomicField(54)) M = H._module chi = DirichletCharacter(H, M([20]))
 
Copy content pari:[g,chi] = znchar(Mod(31,81))
 

Basic properties

Modulus: \(81\)
Conductor: \(81\)
Copy content sage:chi.conductor()
 
Copy content pari:znconreyconductor(g,chi)
 
Order: \(27\)
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 81.g

\(\chi_{81}(4,\cdot)\) \(\chi_{81}(7,\cdot)\) \(\chi_{81}(13,\cdot)\) \(\chi_{81}(16,\cdot)\) \(\chi_{81}(22,\cdot)\) \(\chi_{81}(25,\cdot)\) \(\chi_{81}(31,\cdot)\) \(\chi_{81}(34,\cdot)\) \(\chi_{81}(40,\cdot)\) \(\chi_{81}(43,\cdot)\) \(\chi_{81}(49,\cdot)\) \(\chi_{81}(52,\cdot)\) \(\chi_{81}(58,\cdot)\) \(\chi_{81}(61,\cdot)\) \(\chi_{81}(67,\cdot)\) \(\chi_{81}(70,\cdot)\) \(\chi_{81}(76,\cdot)\) \(\chi_{81}(79,\cdot)\)

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: \(\Q(\zeta_{27})\)
Fixed field: Number field defined by a degree 27 polynomial

Values on generators

\(2\) → \(e\left(\frac{10}{27}\right)\)

First values

\(a\) \(-1\)\(1\)\(2\)\(4\)\(5\)\(7\)\(8\)\(10\)\(11\)\(13\)\(14\)\(16\)
\( \chi_{ 81 }(31, a) \) \(1\)\(1\)\(e\left(\frac{10}{27}\right)\)\(e\left(\frac{20}{27}\right)\)\(e\left(\frac{14}{27}\right)\)\(e\left(\frac{25}{27}\right)\)\(e\left(\frac{1}{9}\right)\)\(e\left(\frac{8}{9}\right)\)\(e\left(\frac{22}{27}\right)\)\(e\left(\frac{26}{27}\right)\)\(e\left(\frac{8}{27}\right)\)\(e\left(\frac{13}{27}\right)\)
Copy content sage:chi.jacobi_sum(n)
 
\( \chi_{ 81 }(31,a) \;\) at \(\;a = \) e.g. 2

Gauss sum

Copy content sage:chi.gauss_sum(a)
 
Copy content pari:znchargauss(g,chi,a)
 
\( \tau_{ a }( \chi_{ 81 }(31,·) )\;\) at \(\;a = \) e.g. 2

Jacobi sum

Copy content sage:chi.jacobi_sum(n)
 
\( J(\chi_{ 81 }(31,·),\chi_{ 81 }(n,·)) \;\) for \( \; n = \) e.g. 1

Kloosterman sum

Copy content sage:chi.kloosterman_sum(a,b)
 
\(K(a,b,\chi_{ 81 }(31,·)) \;\) at \(\; a,b = \) e.g. 1,2