Properties

Modulus $20$
Structure \(C_{2}\times C_{4}\)
Order $8$

Learn more

Show commands: Pari/GP / SageMath

sage: H = DirichletGroup(20)
 
pari: g = idealstar(,20,2)
 

Character group

sage: G.order()
 
pari: g.no
 
Order = 8
sage: H.invariants()
 
pari: g.cyc
 
Structure = \(C_{2}\times C_{4}\)
sage: H.gens()
 
pari: g.gen
 
Generators = $\chi_{20}(11,\cdot)$, $\chi_{20}(17,\cdot)$

Characters

Each row describes a character. When available, the columns show the orbit label, order of the character, whether the character is primitive, and several values of the character.

Character Orbit Order Primitive \(-1\) \(1\) \(3\) \(7\) \(9\) \(11\) \(13\) \(17\)
\(\chi_{20}(1,\cdot)\) 20.a 1 no \(1\) \(1\) \(1\) \(1\) \(1\) \(1\) \(1\) \(1\)
\(\chi_{20}(3,\cdot)\) 20.e 4 yes \(1\) \(1\) \(-i\) \(i\) \(-1\) \(-1\) \(i\) \(-i\)
\(\chi_{20}(7,\cdot)\) 20.e 4 yes \(1\) \(1\) \(i\) \(-i\) \(-1\) \(-1\) \(-i\) \(i\)
\(\chi_{20}(9,\cdot)\) 20.c 2 no \(1\) \(1\) \(-1\) \(-1\) \(1\) \(1\) \(-1\) \(-1\)
\(\chi_{20}(11,\cdot)\) 20.b 2 no \(-1\) \(1\) \(-1\) \(-1\) \(1\) \(-1\) \(1\) \(1\)
\(\chi_{20}(13,\cdot)\) 20.f 4 no \(-1\) \(1\) \(i\) \(-i\) \(-1\) \(1\) \(i\) \(-i\)
\(\chi_{20}(17,\cdot)\) 20.f 4 no \(-1\) \(1\) \(-i\) \(i\) \(-1\) \(1\) \(-i\) \(i\)
\(\chi_{20}(19,\cdot)\) 20.d 2 yes \(-1\) \(1\) \(1\) \(1\) \(1\) \(-1\) \(-1\) \(-1\)