Properties

Label 7220.2.a.t
Level $7220$
Weight $2$
Character orbit 7220.a
Self dual yes
Analytic conductor $57.652$
Analytic rank $1$
Dimension $8$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [7220,2,Mod(1,7220)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(7220, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("7220.1");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 7220 = 2^{2} \cdot 5 \cdot 19^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 7220.a (trivial)

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: yes
Analytic conductor: \(57.6519902594\)
Analytic rank: \(1\)
Dimension: \(8\)
Coefficient field: 8.8.14884000000.2
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - 11x^{6} + 36x^{4} - 31x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Fricke sign: \(1\)
Sato-Tate group: $\mathrm{SU}(2)$

$q$-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.

\(f(q)\) \(=\) \( q + \beta_1 q^{3} + q^{5} + (\beta_{4} - \beta_{2} - 1) q^{7} + \beta_{2} q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_1 q^{3} + q^{5} + (\beta_{4} - \beta_{2} - 1) q^{7} + \beta_{2} q^{9} + (\beta_{4} + \beta_{3} + 2) q^{11} + ( - \beta_{7} + \beta_{6} - 2 \beta_{5}) q^{13} + \beta_1 q^{15} + ( - \beta_{4} - \beta_{2} - 4) q^{17} + ( - \beta_{7} - \beta_{6} + \cdots - 2 \beta_1) q^{21}+ \cdots + (4 \beta_{4} + \beta_{3} + \beta_{2} + 5) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 8 q^{5} - 10 q^{7} - 2 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 8 q^{5} - 10 q^{7} - 2 q^{9} + 8 q^{11} - 26 q^{17} - 10 q^{23} + 8 q^{25} - 10 q^{35} + 2 q^{39} - 8 q^{43} - 2 q^{45} + 20 q^{47} - 6 q^{49} + 8 q^{55} - 8 q^{61} - 30 q^{63} - 76 q^{73} - 20 q^{77} - 28 q^{81} - 64 q^{83} - 26 q^{85} + 6 q^{87} - 58 q^{93} + 18 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} - 11x^{6} + 36x^{4} - 31x^{2} + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - 3 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{4} - 5\nu^{2} + 1 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( \nu^{6} - 8\nu^{4} + 16\nu^{2} - 7 ) / 4 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( \nu^{7} - 8\nu^{5} + 16\nu^{3} - 7\nu ) / 4 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -\nu^{7} + 12\nu^{5} - 40\nu^{3} + 27\nu ) / 4 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{7} - 12\nu^{5} + 44\nu^{3} - 43\nu ) / 4 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} + 3 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{7} + \beta_{6} + 4\beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{3} + 5\beta_{2} + 14 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( 6\beta_{7} + 7\beta_{6} + \beta_{5} + 19\beta_1 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 4\beta_{4} + 8\beta_{3} + 24\beta_{2} + 71 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( 32\beta_{7} + 40\beta_{6} + 12\beta_{5} + 95\beta_1 \) Copy content Toggle raw display

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1.1
−2.30927
−2.08529
−1.13370
−0.183172
0.183172
1.13370
2.08529
2.30927
0 −2.30927 0 1.00000 0 −2.71472 0 2.33275 0
1.2 0 −2.08529 0 1.00000 0 −3.96645 0 1.34841 0
1.3 0 −1.13370 0 1.00000 0 1.33275 0 −1.71472 0
1.4 0 −0.183172 0 1.00000 0 0.348414 0 −2.96645 0
1.5 0 0.183172 0 1.00000 0 0.348414 0 −2.96645 0
1.6 0 1.13370 0 1.00000 0 1.33275 0 −1.71472 0
1.7 0 2.08529 0 1.00000 0 −3.96645 0 1.34841 0
1.8 0 2.30927 0 1.00000 0 −2.71472 0 2.33275 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 1.8
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \(-1\)
\(5\) \(-1\)
\(19\) \(1\)

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
19.b odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 7220.2.a.t 8
19.b odd 2 1 inner 7220.2.a.t 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
7220.2.a.t 8 1.a even 1 1 trivial
7220.2.a.t 8 19.b odd 2 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(7220))\):

\( T_{3}^{8} - 11T_{3}^{6} + 36T_{3}^{4} - 31T_{3}^{2} + 1 \) Copy content Toggle raw display
\( T_{7}^{4} + 5T_{7}^{3} - 15T_{7} + 5 \) Copy content Toggle raw display
\( T_{13}^{4} - 18T_{13}^{2} + 61 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} - 11 T^{6} + \cdots + 1 \) Copy content Toggle raw display
$5$ \( (T - 1)^{8} \) Copy content Toggle raw display
$7$ \( (T^{4} + 5 T^{3} - 15 T + 5)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} - 4 T^{3} - 9 T^{2} + \cdots + 11)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} - 18 T^{2} + 61)^{2} \) Copy content Toggle raw display
$17$ \( (T^{4} + 13 T^{3} + \cdots - 44)^{2} \) Copy content Toggle raw display
$19$ \( T^{8} \) Copy content Toggle raw display
$23$ \( (T^{4} + 5 T^{3} + \cdots + 275)^{2} \) Copy content Toggle raw display
$29$ \( T^{8} - 49 T^{6} + \cdots + 16 \) Copy content Toggle raw display
$31$ \( T^{8} - 131 T^{6} + \cdots + 22801 \) Copy content Toggle raw display
$37$ \( T^{8} - 151 T^{6} + \cdots + 39601 \) Copy content Toggle raw display
$41$ \( T^{8} - 116 T^{6} + \cdots + 151321 \) Copy content Toggle raw display
$43$ \( (T^{4} + 4 T^{3} - 69 T^{2} + \cdots - 89)^{2} \) Copy content Toggle raw display
$47$ \( (T^{4} - 10 T^{3} + \cdots + 55)^{2} \) Copy content Toggle raw display
$53$ \( T^{8} - 194 T^{6} + \cdots + 128881 \) Copy content Toggle raw display
$59$ \( T^{8} - 234 T^{6} + \cdots + 1125721 \) Copy content Toggle raw display
$61$ \( (T^{4} + 4 T^{3} + \cdots + 236)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} - 215 T^{6} + \cdots + 5313025 \) Copy content Toggle raw display
$71$ \( T^{8} - 260 T^{6} + \cdots + 990025 \) Copy content Toggle raw display
$73$ \( (T^{4} + 38 T^{3} + \cdots + 5071)^{2} \) Copy content Toggle raw display
$79$ \( T^{8} - 134 T^{6} + \cdots + 16 \) Copy content Toggle raw display
$83$ \( (T^{4} + 32 T^{3} + \cdots + 2036)^{2} \) Copy content Toggle raw display
$89$ \( T^{8} - 391 T^{6} + \cdots + 5148361 \) Copy content Toggle raw display
$97$ \( T^{8} - 299 T^{6} + \cdots + 290521 \) Copy content Toggle raw display
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