Properties

Modulus 42
Conductor 7
Order 2
Real yes
Primitive no
Minimal yes
Parity odd
Orbit label 42.c

Related objects

Learn more about

Show commands for: Pari/GP / SageMath
sage: from sage.modular.dirichlet import DirichletCharacter
 
sage: H = DirichletGroup(42)
 
sage: M = H._module
 
sage: chi = DirichletCharacter(H, M([0,1]))
 
pari: [g,chi] = znchar(Mod(13,42))
 

Basic properties

sage: chi.conductor()
 
pari: znconreyconductor(g,chi)
 
Modulus = 42
Conductor = 7
sage: chi.multiplicative_order()
 
pari: charorder(g,chi)
 
Order = 2
Real = yes
sage: chi.is_primitive()
 
pari: #znconreyconductor(g,chi)==1 \\ if not primitive returns [cond,factorization]
 
Primitive = no
Minimal = yes
sage: chi.is_odd()
 
pari: zncharisodd(g,chi)
 
Parity = odd
Orbit label = 42.c
Orbit index = 3

Galois orbit

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

\(\chi_{42}(13,\cdot)\)

Values on generators

\((29,31)\) → \((1,-1)\)

Values

-115111317192325293137
\(-1\)\(1\)\(-1\)\(1\)\(-1\)\(-1\)\(-1\)\(1\)\(1\)\(1\)\(-1\)\(1\)
value at  e.g. 2

Related number fields

Field of values \(\Q\)

Gauss sum

sage: chi.gauss_sum(a)
 
pari: znchargauss(g,chi,a)
 
\( \tau_{ a }( \chi_{ 42 }(13,·) )\;\) at \(\;a = \) e.g. 2
\(\displaystyle \tau_{2}(\chi_{42}(13,\cdot)) = \sum_{r\in \Z/42\Z} \chi_{42}(13,r) e\left(\frac{r}{21}\right) = 2.6457513111i \)

Jacobi sum

sage: chi.jacobi_sum(n)
 
\( J(\chi_{ 42 }(13,·),\chi_{ 42 }(n,·)) \;\) for \( \; n = \) e.g. 1
\( \displaystyle J(\chi_{42}(13,\cdot),\chi_{42}(1,\cdot)) = \sum_{r\in \Z/42\Z} \chi_{42}(13,r) \chi_{42}(1,1-r) = 0 \)

Kloosterman sum

sage: chi.kloosterman_sum(a,b)
 
\(K(a,b,\chi_{ 42 }(13,·)) \;\) at \(\; a,b = \) e.g. 1,2
\( \displaystyle K(1,2,\chi_{42}(13,·)) = \sum_{r \in \Z/42\Z} \chi_{42}(13,r) e\left(\frac{1 r + 2 r^{-1}}{42}\right) = 6.5983958428i \)