Properties

Label 1216.2.c.i
Level $1216$
Weight $2$
Character orbit 1216.c
Analytic conductor $9.710$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1216,2,Mod(609,1216)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1216, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 1, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1216.609");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1216 = 2^{6} \cdot 19 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1216.c (of order \(2\), degree \(1\), minimal)

Newform invariants

comment: select newform
 
sage: f = N[0] # Warning: the index may be different
 
gp: f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(9.70980888579\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.2702336256.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 9x^{6} + 56x^{4} + 225x^{2} + 625 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{19}]\)
Coefficient ring index: \( 2^{6} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-expansion

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

Coefficients of the \(q\)-expansion are expressed in terms of a basis \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_{3} q^{5} + \beta_{5} q^{7} + 3 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_{3} q^{5} + \beta_{5} q^{7} + 3 q^{9} + ( - 2 \beta_{4} - \beta_{2}) q^{11} + (\beta_{3} - \beta_1) q^{13} - \beta_{6} q^{17} - \beta_{4} q^{19} + ( - \beta_{7} + \beta_{5}) q^{23} + (\beta_{6} - 1) q^{25} + (\beta_{3} - \beta_1) q^{29} - 2 \beta_{7} q^{31} + ( - 2 \beta_{4} + \beta_{2}) q^{35} + ( - 3 \beta_{3} - \beta_1) q^{37} + ( - 2 \beta_{6} - 2) q^{41} + ( - 6 \beta_{4} + \beta_{2}) q^{43} - 3 \beta_{3} q^{45} - \beta_{5} q^{47} + (3 \beta_{6} + 3) q^{49} + ( - 3 \beta_{3} - 3 \beta_1) q^{53} + ( - 5 \beta_{7} + 2 \beta_{5}) q^{55} + 2 \beta_{2} q^{59} - \beta_{3} q^{61} + 3 \beta_{5} q^{63} + 8 q^{65} + 2 \beta_{2} q^{67} + (4 \beta_{7} + 2 \beta_{5}) q^{71} + \beta_{6} q^{73} + (\beta_{3} - 2 \beta_1) q^{77} + ( - 4 \beta_{7} + 2 \beta_{5}) q^{79} + 9 q^{81} + ( - 4 \beta_{4} - 4 \beta_{2}) q^{83} + ( - 3 \beta_{3} - 2 \beta_1) q^{85} - 10 q^{89} + (12 \beta_{4} - 4 \beta_{2}) q^{91} - \beta_{7} q^{95} + ( - 2 \beta_{6} + 10) q^{97} + ( - 6 \beta_{4} - 3 \beta_{2}) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 24 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 24 q^{9} - 4 q^{17} - 4 q^{25} - 24 q^{41} + 36 q^{49} + 64 q^{65} + 4 q^{73} + 72 q^{81} - 80 q^{89} + 72 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 9x^{6} + 56x^{4} + 225x^{2} + 625 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{6} + 84\nu^{4} + 756\nu^{2} + 2325 ) / 700 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -\nu^{7} - 14\nu^{5} - 126\nu^{3} - 855\nu ) / 350 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 17\nu^{6} + 28\nu^{4} + 252\nu^{2} + 325 ) / 700 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -9\nu^{7} - 56\nu^{5} - 154\nu^{3} - 625\nu ) / 1750 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( 3\nu^{7} + 52\nu^{5} + 268\nu^{3} + 575\nu ) / 500 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -\nu^{6} - 9\nu^{4} - 31\nu^{2} - 100 ) / 25 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{7} + 4\nu^{5} + 36\nu^{3} + 45\nu ) / 100 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( -\beta_{7} - \beta_{5} - 2\beta_{4} - 2\beta_{2} ) / 4 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( 2\beta_{6} + 3\beta_{3} + 5\beta _1 - 10 ) / 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( 3\beta_{7} + \beta_{5} + 7\beta_{4} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( -18\beta_{6} - 29\beta_{3} - 11\beta _1 - 22 ) / 4 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -67\beta_{7} + 45\beta_{5} - 90\beta_{4} + 22\beta_{2} ) / 4 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 42\beta_{3} - 14\beta _1 + 27 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( 281\beta_{7} - 279\beta_{5} - 558\beta_{4} + 2\beta_{2} ) / 4 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1216\mathbb{Z}\right)^\times\).

\(n\) \(191\) \(705\) \(837\)
\(\chi(n)\) \(1\) \(1\) \(-1\)

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.

comment: embeddings in the coefficient field
 
gp: mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
609.1
−0.656712 2.13746i
0.656712 + 2.13746i
1.52274 1.63746i
−1.52274 + 1.63746i
1.52274 + 1.63746i
−1.52274 1.63746i
−0.656712 + 2.13746i
0.656712 2.13746i
0 0 0 3.04547i 0 −0.418627 0 3.00000 0
609.2 0 0 0 3.04547i 0 0.418627 0 3.00000 0
609.3 0 0 0 1.31342i 0 −4.77753 0 3.00000 0
609.4 0 0 0 1.31342i 0 4.77753 0 3.00000 0
609.5 0 0 0 1.31342i 0 −4.77753 0 3.00000 0
609.6 0 0 0 1.31342i 0 4.77753 0 3.00000 0
609.7 0 0 0 3.04547i 0 −0.418627 0 3.00000 0
609.8 0 0 0 3.04547i 0 0.418627 0 3.00000 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 609.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 inner
8.b even 2 1 inner
8.d odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1216.2.c.i 8
4.b odd 2 1 inner 1216.2.c.i 8
8.b even 2 1 inner 1216.2.c.i 8
8.d odd 2 1 inner 1216.2.c.i 8
16.e even 4 1 4864.2.a.bj 4
16.e even 4 1 4864.2.a.bk 4
16.f odd 4 1 4864.2.a.bj 4
16.f odd 4 1 4864.2.a.bk 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1216.2.c.i 8 1.a even 1 1 trivial
1216.2.c.i 8 4.b odd 2 1 inner
1216.2.c.i 8 8.b even 2 1 inner
1216.2.c.i 8 8.d odd 2 1 inner
4864.2.a.bj 4 16.e even 4 1
4864.2.a.bj 4 16.f odd 4 1
4864.2.a.bk 4 16.e even 4 1
4864.2.a.bk 4 16.f odd 4 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1216, [\chi])\):

\( T_{3} \) Copy content Toggle raw display
\( T_{5}^{4} + 11T_{5}^{2} + 16 \) Copy content Toggle raw display
\( T_{7}^{4} - 23T_{7}^{2} + 4 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( (T^{4} + 11 T^{2} + 16)^{2} \) Copy content Toggle raw display
$7$ \( (T^{4} - 23 T^{2} + 4)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} + 33 T^{2} + 144)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 44 T^{2} + 256)^{2} \) Copy content Toggle raw display
$17$ \( (T^{2} + T - 14)^{4} \) Copy content Toggle raw display
$19$ \( (T^{2} + 1)^{4} \) Copy content Toggle raw display
$23$ \( (T^{2} - 12)^{4} \) Copy content Toggle raw display
$29$ \( (T^{4} + 44 T^{2} + 256)^{2} \) Copy content Toggle raw display
$31$ \( (T^{4} - 44 T^{2} + 256)^{2} \) Copy content Toggle raw display
$37$ \( (T^{4} + 92 T^{2} + 64)^{2} \) Copy content Toggle raw display
$41$ \( (T^{2} + 6 T - 48)^{4} \) Copy content Toggle raw display
$43$ \( (T^{4} + 113 T^{2} + 784)^{2} \) Copy content Toggle raw display
$47$ \( (T^{4} - 23 T^{2} + 4)^{2} \) Copy content Toggle raw display
$53$ \( (T^{2} + 108)^{4} \) Copy content Toggle raw display
$59$ \( (T^{4} + 116 T^{2} + 3136)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} + 11 T^{2} + 16)^{2} \) Copy content Toggle raw display
$67$ \( (T^{4} + 116 T^{2} + 3136)^{2} \) Copy content Toggle raw display
$71$ \( (T^{4} - 348 T^{2} + 28224)^{2} \) Copy content Toggle raw display
$73$ \( (T^{2} - T - 14)^{4} \) Copy content Toggle raw display
$79$ \( (T^{4} - 188 T^{2} + 3136)^{2} \) Copy content Toggle raw display
$83$ \( (T^{4} + 464 T^{2} + 50176)^{2} \) Copy content Toggle raw display
$89$ \( (T + 10)^{8} \) Copy content Toggle raw display
$97$ \( (T^{2} - 18 T + 24)^{4} \) Copy content Toggle raw display
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