Properties

Label 1764.2.k.b
Level $1764$
Weight $2$
Character orbit 1764.k
Analytic conductor $14.086$
Analytic rank $0$
Dimension $2$
Inner twists $2$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [1764,2,Mod(361,1764)] mf = mfinit([N,k,chi],0) lf = mfeigenbasis(mf)
 
Copy content magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code chi := DirichletCharacter("1764.361"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(1764, base_ring=CyclotomicField(6)) chi = DirichletCharacter(H, H._module([0, 0, 4])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 1764 = 2^{2} \cdot 3^{2} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1764.k (of order \(3\), degree \(2\), not minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [2,0,0,0,-3,0,0,0,0,0,-3,0,-4] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(13)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(14.0856109166\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{-3}) \)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{19}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 28)
Sato-Tate group: $\mathrm{SU}(2)[C_{3}]$

$q$-expansion

Copy content comment:q-expansion
 
Copy content sage:f.q_expansion() # note that sage often uses an isomorphic number field
 
Copy content gp:mfcoefs(f, 20)
 

Coefficients of the \(q\)-expansion are expressed in terms of a primitive root of unity \(\zeta_{6}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - 3 \zeta_{6} q^{5} + (3 \zeta_{6} - 3) q^{11} - 2 q^{13} + (3 \zeta_{6} - 3) q^{17} - \zeta_{6} q^{19} + 3 \zeta_{6} q^{23} + (4 \zeta_{6} - 4) q^{25} + 6 q^{29} + (7 \zeta_{6} - 7) q^{31} + \zeta_{6} q^{37} + \cdots + 10 q^{97} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 3 q^{5} - 3 q^{11} - 4 q^{13} - 3 q^{17} - q^{19} + 3 q^{23} - 4 q^{25} + 12 q^{29} - 7 q^{31} + q^{37} + 12 q^{41} - 8 q^{43} + 9 q^{47} + 3 q^{53} + 18 q^{55} - 9 q^{59} - q^{61} + 6 q^{65} + 7 q^{67}+ \cdots + 20 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1764\mathbb{Z}\right)^\times\).

\(n\) \(785\) \(883\) \(1081\)
\(\chi(n)\) \(1\) \(1\) \(-\zeta_{6}\)

Embeddings

For each embedding \(\iota_m\) of the coefficient field, the values \(\iota_m(a_n)\) are shown below.

For more information on an embedded modular form you can click on its label.

Copy content comment:embeddings in the coefficient field
 
Copy content gp:mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
361.1
0.500000 + 0.866025i
0.500000 0.866025i
0 0 0 −1.50000 2.59808i 0 0 0 0 0
1549.1 0 0 0 −1.50000 + 2.59808i 0 0 0 0 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
7.c even 3 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1764.2.k.b 2
3.b odd 2 1 196.2.e.a 2
7.b odd 2 1 252.2.k.c 2
7.c even 3 1 1764.2.a.j 1
7.c even 3 1 inner 1764.2.k.b 2
7.d odd 6 1 252.2.k.c 2
7.d odd 6 1 1764.2.a.a 1
12.b even 2 1 784.2.i.d 2
21.c even 2 1 28.2.e.a 2
21.g even 6 1 28.2.e.a 2
21.g even 6 1 196.2.a.b 1
21.h odd 6 1 196.2.a.a 1
21.h odd 6 1 196.2.e.a 2
28.d even 2 1 1008.2.s.p 2
28.f even 6 1 1008.2.s.p 2
28.f even 6 1 7056.2.a.f 1
28.g odd 6 1 7056.2.a.bw 1
63.i even 6 1 2268.2.l.h 2
63.k odd 6 1 2268.2.i.h 2
63.l odd 6 1 2268.2.i.h 2
63.l odd 6 1 2268.2.l.a 2
63.o even 6 1 2268.2.i.a 2
63.o even 6 1 2268.2.l.h 2
63.s even 6 1 2268.2.i.a 2
63.t odd 6 1 2268.2.l.a 2
84.h odd 2 1 112.2.i.b 2
84.j odd 6 1 112.2.i.b 2
84.j odd 6 1 784.2.a.d 1
84.n even 6 1 784.2.a.g 1
84.n even 6 1 784.2.i.d 2
105.g even 2 1 700.2.i.c 2
105.k odd 4 2 700.2.r.b 4
105.o odd 6 1 4900.2.a.n 1
105.p even 6 1 700.2.i.c 2
105.p even 6 1 4900.2.a.g 1
105.w odd 12 2 700.2.r.b 4
105.w odd 12 2 4900.2.e.i 2
105.x even 12 2 4900.2.e.h 2
168.e odd 2 1 448.2.i.c 2
168.i even 2 1 448.2.i.e 2
168.s odd 6 1 3136.2.a.v 1
168.v even 6 1 3136.2.a.k 1
168.ba even 6 1 448.2.i.e 2
168.ba even 6 1 3136.2.a.h 1
168.be odd 6 1 448.2.i.c 2
168.be odd 6 1 3136.2.a.s 1
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
28.2.e.a 2 21.c even 2 1
28.2.e.a 2 21.g even 6 1
112.2.i.b 2 84.h odd 2 1
112.2.i.b 2 84.j odd 6 1
196.2.a.a 1 21.h odd 6 1
196.2.a.b 1 21.g even 6 1
196.2.e.a 2 3.b odd 2 1
196.2.e.a 2 21.h odd 6 1
252.2.k.c 2 7.b odd 2 1
252.2.k.c 2 7.d odd 6 1
448.2.i.c 2 168.e odd 2 1
448.2.i.c 2 168.be odd 6 1
448.2.i.e 2 168.i even 2 1
448.2.i.e 2 168.ba even 6 1
700.2.i.c 2 105.g even 2 1
700.2.i.c 2 105.p even 6 1
700.2.r.b 4 105.k odd 4 2
700.2.r.b 4 105.w odd 12 2
784.2.a.d 1 84.j odd 6 1
784.2.a.g 1 84.n even 6 1
784.2.i.d 2 12.b even 2 1
784.2.i.d 2 84.n even 6 1
1008.2.s.p 2 28.d even 2 1
1008.2.s.p 2 28.f even 6 1
1764.2.a.a 1 7.d odd 6 1
1764.2.a.j 1 7.c even 3 1
1764.2.k.b 2 1.a even 1 1 trivial
1764.2.k.b 2 7.c even 3 1 inner
2268.2.i.a 2 63.o even 6 1
2268.2.i.a 2 63.s even 6 1
2268.2.i.h 2 63.k odd 6 1
2268.2.i.h 2 63.l odd 6 1
2268.2.l.a 2 63.l odd 6 1
2268.2.l.a 2 63.t odd 6 1
2268.2.l.h 2 63.i even 6 1
2268.2.l.h 2 63.o even 6 1
3136.2.a.h 1 168.ba even 6 1
3136.2.a.k 1 168.v even 6 1
3136.2.a.s 1 168.be odd 6 1
3136.2.a.v 1 168.s odd 6 1
4900.2.a.g 1 105.p even 6 1
4900.2.a.n 1 105.o odd 6 1
4900.2.e.h 2 105.x even 12 2
4900.2.e.i 2 105.w odd 12 2
7056.2.a.f 1 28.f even 6 1
7056.2.a.bw 1 28.g odd 6 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1764, [\chi])\):

\( T_{5}^{2} + 3T_{5} + 9 \) Copy content Toggle raw display
\( T_{11}^{2} + 3T_{11} + 9 \) Copy content Toggle raw display
\( T_{13} + 2 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( T^{2} + 3T + 9 \) Copy content Toggle raw display
$7$ \( T^{2} \) Copy content Toggle raw display
$11$ \( T^{2} + 3T + 9 \) Copy content Toggle raw display
$13$ \( (T + 2)^{2} \) Copy content Toggle raw display
$17$ \( T^{2} + 3T + 9 \) Copy content Toggle raw display
$19$ \( T^{2} + T + 1 \) Copy content Toggle raw display
$23$ \( T^{2} - 3T + 9 \) Copy content Toggle raw display
$29$ \( (T - 6)^{2} \) Copy content Toggle raw display
$31$ \( T^{2} + 7T + 49 \) Copy content Toggle raw display
$37$ \( T^{2} - T + 1 \) Copy content Toggle raw display
$41$ \( (T - 6)^{2} \) Copy content Toggle raw display
$43$ \( (T + 4)^{2} \) Copy content Toggle raw display
$47$ \( T^{2} - 9T + 81 \) Copy content Toggle raw display
$53$ \( T^{2} - 3T + 9 \) Copy content Toggle raw display
$59$ \( T^{2} + 9T + 81 \) Copy content Toggle raw display
$61$ \( T^{2} + T + 1 \) Copy content Toggle raw display
$67$ \( T^{2} - 7T + 49 \) Copy content Toggle raw display
$71$ \( T^{2} \) Copy content Toggle raw display
$73$ \( T^{2} + T + 1 \) Copy content Toggle raw display
$79$ \( T^{2} - 13T + 169 \) Copy content Toggle raw display
$83$ \( (T - 12)^{2} \) Copy content Toggle raw display
$89$ \( T^{2} + 15T + 225 \) Copy content Toggle raw display
$97$ \( (T - 10)^{2} \) Copy content Toggle raw display
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