Properties

Label 1764.3.d.g
Level $1764$
Weight $3$
Character orbit 1764.d
Analytic conductor $48.066$
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] = [1764,3,Mod(685,1764)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1764, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 1]))
 
N = Newforms(chi, 3, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1764.685");
 
S:= CuspForms(chi, 3);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1764 = 2^{2} \cdot 3^{2} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 3 \)
Character orbit: \([\chi]\) \(=\) 1764.d (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: \(48.0655186332\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.3288334336.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 12x^{6} + 30x^{4} + 12x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{13}]\)
Coefficient ring index: \( 2^{3}\cdot 7^{6} \)
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.

\(f(q)\) \(=\) \( q - \beta_1 q^{5}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_1 q^{5} - \beta_{3} q^{11} + \beta_{6} q^{13} + 3 \beta_1 q^{17} + ( - 2 \beta_{6} + \beta_{5}) q^{19} + ( - \beta_{4} - \beta_{3}) q^{23} + (\beta_{2} - 3) q^{25} + ( - \beta_{4} + \beta_{3}) q^{29} + (4 \beta_{6} + 5 \beta_{5}) q^{31} + (3 \beta_{2} + 16) q^{37} + (\beta_{7} + \beta_1) q^{41} + ( - 2 \beta_{2} + 22) q^{43} + (\beta_{7} - 2 \beta_1) q^{47} + 2 \beta_{3} q^{53} + (18 \beta_{6} - \beta_{5}) q^{55} + ( - \beta_{7} - 2 \beta_1) q^{59} + ( - 13 \beta_{6} + 12 \beta_{5}) q^{61} + \beta_{3} q^{65} + (6 \beta_{2} - 32) q^{67} + (2 \beta_{4} + \beta_{3}) q^{71} + (21 \beta_{6} + 22 \beta_{5}) q^{73} + (8 \beta_{2} + 54) q^{79} + ( - 2 \beta_{7} + 2 \beta_1) q^{83} + ( - 3 \beta_{2} + 84) q^{85} + ( - 2 \beta_{7} + 9 \beta_1) q^{89} + (\beta_{4} - 2 \beta_{3}) q^{95} + (27 \beta_{6} + 2 \beta_{5}) q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 24 q^{25} + 128 q^{37} + 176 q^{43} - 256 q^{67} + 432 q^{79} + 672 q^{85}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 12x^{6} + 30x^{4} + 12x^{2} + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{7} + 13\nu^{5} + 43\nu^{3} + 55\nu ) / 4 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 7\nu^{6} + 84\nu^{4} + 203\nu^{2} + 42 ) / 2 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -6\nu^{6} - 71\nu^{4} - 174\nu^{2} - 57 ) / 2 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -17\nu^{6} - 193\nu^{4} - 395\nu^{2} - 39 ) / 2 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( -2\nu^{7} - 23\nu^{5} - 49\nu^{3} - 4\nu \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -9\nu^{7} - 107\nu^{5} - 259\nu^{3} - 81\nu ) / 4 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( 43\nu^{7} + 510\nu^{5} + 1212\nu^{3} + 307\nu \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{7} + 28\beta_{6} - 7\beta_{5} + 24\beta_1 ) / 98 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{4} - 11\beta_{3} - 7\beta_{2} - 147 ) / 49 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -13\beta_{7} - 280\beta_{6} + 21\beta_{5} - 116\beta_1 ) / 98 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( 14\beta_{3} + 12\beta_{2} + 147 ) / 7 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( 125\beta_{7} + 2464\beta_{6} + 21\beta_{5} + 844\beta_1 ) / 98 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( -29\beta_{4} - 857\beta_{3} - 791\beta_{2} - 8379 ) / 49 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( -1121\beta_{7} - 21532\beta_{6} - 791\beta_{5} - 6912\beta_1 ) / 98 \) Copy content Toggle raw display

Character values

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

\(n\) \(785\) \(883\) \(1081\)
\(\chi(n)\) \(1\) \(1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
685.1
1.67825i
0.595859i
2.95189i
0.338766i
2.95189i
0.338766i
1.67825i
0.595859i
0 0 0 6.15626i 0 0 0 0 0
685.2 0 0 0 6.15626i 0 0 0 0 0
685.3 0 0 0 4.25447i 0 0 0 0 0
685.4 0 0 0 4.25447i 0 0 0 0 0
685.5 0 0 0 4.25447i 0 0 0 0 0
685.6 0 0 0 4.25447i 0 0 0 0 0
685.7 0 0 0 6.15626i 0 0 0 0 0
685.8 0 0 0 6.15626i 0 0 0 0 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 685.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 inner
7.b odd 2 1 inner
21.c even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1764.3.d.g 8
3.b odd 2 1 inner 1764.3.d.g 8
7.b odd 2 1 inner 1764.3.d.g 8
7.c even 3 2 1764.3.z.n 16
7.d odd 6 2 1764.3.z.n 16
21.c even 2 1 inner 1764.3.d.g 8
21.g even 6 2 1764.3.z.n 16
21.h odd 6 2 1764.3.z.n 16
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1764.3.d.g 8 1.a even 1 1 trivial
1764.3.d.g 8 3.b odd 2 1 inner
1764.3.d.g 8 7.b odd 2 1 inner
1764.3.d.g 8 21.c even 2 1 inner
1764.3.z.n 16 7.c even 3 2
1764.3.z.n 16 7.d odd 6 2
1764.3.z.n 16 21.g even 6 2
1764.3.z.n 16 21.h odd 6 2

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{3}^{\mathrm{new}}(1764, [\chi])\):

\( T_{5}^{4} + 56T_{5}^{2} + 686 \) Copy content Toggle raw display
\( T_{11}^{4} - 364T_{11}^{2} + 1372 \) 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
$5$ \( (T^{4} + 56 T^{2} + 686)^{2} \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( (T^{4} - 364 T^{2} + 1372)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 20 T^{2} + 2)^{2} \) Copy content Toggle raw display
$17$ \( (T^{4} + 504 T^{2} + 55566)^{2} \) Copy content Toggle raw display
$19$ \( (T^{4} + 136 T^{2} + 4232)^{2} \) Copy content Toggle raw display
$23$ \( (T^{4} - 1652 T^{2} + 396508)^{2} \) Copy content Toggle raw display
$29$ \( (T^{4} - 2100 T^{2} + 725788)^{2} \) Copy content Toggle raw display
$31$ \( (T^{4} + 1160 T^{2} + 223112)^{2} \) Copy content Toggle raw display
$37$ \( (T^{2} - 32 T - 626)^{4} \) Copy content Toggle raw display
$41$ \( (T^{4} + 4928 T^{2} + 3655694)^{2} \) Copy content Toggle raw display
$43$ \( (T^{2} - 44 T + 92)^{4} \) Copy content Toggle raw display
$47$ \( (T^{4} + 4928 T^{2} + 6061496)^{2} \) Copy content Toggle raw display
$53$ \( (T^{4} - 1456 T^{2} + 21952)^{2} \) Copy content Toggle raw display
$59$ \( (T^{4} + 5152 T^{2} + 2636984)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} + 10388 T^{2} + 25589858)^{2} \) Copy content Toggle raw display
$67$ \( (T^{2} + 64 T - 2504)^{4} \) Copy content Toggle raw display
$71$ \( (T^{4} - 5964 T^{2} + 1318492)^{2} \) Copy content Toggle raw display
$73$ \( (T^{4} + 24484 T^{2} + 122649122)^{2} \) Copy content Toggle raw display
$79$ \( (T^{2} - 108 T - 3356)^{4} \) Copy content Toggle raw display
$83$ \( (T^{4} + 19264 T^{2} + 86940896)^{2} \) Copy content Toggle raw display
$89$ \( (T^{4} + 22792 T^{2} + 104876366)^{2} \) Copy content Toggle raw display
$97$ \( (T^{4} + 14308 T^{2} + 235298)^{2} \) Copy content Toggle raw display
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