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Properties

Label 205.28
Modulus $205$
Conductor $205$
Order $40$
Real no
Primitive yes
Minimal yes
Parity even

Related objects

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Show commands: Magma / Pari/GP / SageMath
Copy content comment:Define the Dirichlet character
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(205, base_ring=CyclotomicField(40)) M = H._module chi = DirichletCharacter(H, M([30,11]))
 
Copy content gp:[g,chi] = znchar(Mod(28, 205))
 
Copy content magma:// Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code chi := DirichletCharacter("205.28");
 

Basic properties

Modulus: \(205\)
Copy content comment:Modulus
 
Copy content sage:chi.modulus()
 
Copy content gp:g[1][1]
 
Copy content magma:Modulus(chi);
 
Conductor: \(205\)
Copy content comment:Conductor
 
Copy content sage:chi.conductor()
 
Copy content gp:znconreyconductor(g,chi)
 
Copy content magma:Conductor(chi);
 
Order: \(40\)
Copy content comment:Order
 
Copy content sage:chi.multiplicative_order()
 
Copy content gp:charorder(g,chi)
 
Copy content magma:Order(chi);
 
Real: no
Copy content comment:Whether the character is real
 
Copy content sage:chi.multiplicative_order() <= 2
 
Copy content gp:charorder(g,chi) <= 2
 
Copy content magma:Order(chi) le 2;
 
Primitive: yes
Copy content comment:If the character is primitive
 
Copy content sage:chi.is_primitive()
 
Copy content gp:#znconreyconductor(g,chi)==1
 
Copy content magma:IsPrimitive(chi);
 
Minimal: yes
Parity: even
Copy content comment:Parity
 
Copy content sage:chi.is_odd()
 
Copy content gp:zncharisodd(g,chi)
 
Copy content magma:IsOdd(chi);
 

Galois orbit 205.bb

\(\chi_{205}(13,\cdot)\) \(\chi_{205}(17,\cdot)\) \(\chi_{205}(22,\cdot)\) \(\chi_{205}(28,\cdot)\) \(\chi_{205}(47,\cdot)\) \(\chi_{205}(48,\cdot)\) \(\chi_{205}(53,\cdot)\) \(\chi_{205}(67,\cdot)\) \(\chi_{205}(93,\cdot)\) \(\chi_{205}(97,\cdot)\) \(\chi_{205}(117,\cdot)\) \(\chi_{205}(142,\cdot)\) \(\chi_{205}(147,\cdot)\) \(\chi_{205}(153,\cdot)\) \(\chi_{205}(193,\cdot)\) \(\chi_{205}(198,\cdot)\)

Copy content comment:Galois orbit
 
Copy content sage:chi.galois_orbit()
 
Copy content gp:order = charorder(g,chi) [ charpow(g,chi, k % order) | k <-[1..order-1], gcd(k,order)==1 ]
 
Copy content magma:order := Order(chi); { chi^k : k in [1..order-1] | GCD(k,order) eq 1 };
 

Related number fields

Field of values: \(\Q(\zeta_{40})\)
Copy content comment:Field of values of chi
 
Copy content sage:CyclotomicField(chi.multiplicative_order())
 
Copy content gp:nfinit(polcyclo(charorder(g,chi)))
 
Copy content magma:CyclotomicField(Order(chi));
 
Fixed field: 40.40.737344664758480175980241689422890987152982395783688920879217945970594882965087890625.1
Copy content comment:Fixed field
 
Copy content sage:chi.fixed_field()
 

Values on generators

\((42,6)\) → \((-i,e\left(\frac{11}{40}\right))\)

First values

\(a\) \(-1\)\(1\)\(2\)\(3\)\(4\)\(6\)\(7\)\(8\)\(9\)\(11\)\(12\)\(13\)
\( \chi_{ 205 }(28, a) \) \(1\)\(1\)\(e\left(\frac{9}{10}\right)\)\(e\left(\frac{3}{8}\right)\)\(e\left(\frac{4}{5}\right)\)\(e\left(\frac{11}{40}\right)\)\(e\left(\frac{19}{40}\right)\)\(e\left(\frac{7}{10}\right)\)\(-i\)\(e\left(\frac{33}{40}\right)\)\(e\left(\frac{7}{40}\right)\)\(e\left(\frac{31}{40}\right)\)
Copy content comment:Value of chi at x
 
Copy content sage:chi(x) # x integer
 
Copy content gp:chareval(g,chi,x) \\ x integer, value in Q/Z
 
Copy content magma:chi(x)
 
\( \chi_{ 205 }(28,a) \;\) at \(\;a = \) e.g. 2

Gauss sum

Copy content comment:Gauss sum
 
Copy content sage:chi.gauss_sum(a)
 
Copy content gp:znchargauss(g,chi,a)
 
\( \tau_{ a }( \chi_{ 205 }(28,·) )\;\) at \(\;a = \) e.g. 2

Jacobi sum

Copy content comment:Jacobi sum
 
Copy content sage:chi.jacobi_sum(n)
 
\( J(\chi_{ 205 }(28,·),\chi_{ 205 }(n,·)) \;\) for \( \; n = \) e.g. 1

Kloosterman sum

Copy content comment:Kloosterman sum
 
Copy content sage:chi.kloosterman_sum(a,b)
 
\(K(a,b,\chi_{ 205 }(28,·)) \;\) at \(\; a,b = \) e.g. 1,2