Properties

Label 380.2.l.a
Level $380$
Weight $2$
Character orbit 380.l
Analytic conductor $3.034$
Analytic rank $0$
Dimension $8$
CM discriminant -19
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [380,2,Mod(37,380)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(380, base_ring=CyclotomicField(4))
 
chi = DirichletCharacter(H, H._module([0, 1, 2]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("380.37");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 380 = 2^{2} \cdot 5 \cdot 19 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 380.l (of order \(4\), degree \(2\), 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: \(3.03431527681\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(i)\)
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: \( 2^{2}\cdot 5 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{4}]$

$q$-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.

\(f(q)\) \(=\) \( q + \beta_{6} q^{5} + (\beta_{7} - \beta_{6} + \beta_{5} + \cdots - 1) q^{7}+ \cdots + 3 \beta_{3} q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{6} q^{5} + (\beta_{7} - \beta_{6} + \beta_{5} + \cdots - 1) q^{7}+ \cdots + ( - 3 \beta_{7} - 3 \beta_{6} + \cdots + 3 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 2 q^{5} - 6 q^{7}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 2 q^{5} - 6 q^{7} + 14 q^{17} + 16 q^{23} + 18 q^{25} - 22 q^{35} + 2 q^{43} - 26 q^{47} - 18 q^{63} + 22 q^{73} + 26 q^{77} - 72 q^{81} - 64 q^{83} + 24 q^{85} + 38 q^{95}+O(q^{100}) \) 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

\(\beta_{1}\)\(=\) \( ( -14\nu^{7} + 55\nu^{6} + 224\nu^{5} + 1120\nu^{4} + 616\nu^{3} + 3080\nu^{2} + 2450\nu + 12375 ) / 7000 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 7\nu^{7} - 40\nu^{6} - 112\nu^{5} + 140\nu^{4} - 308\nu^{3} + 1260\nu^{2} - 1225\nu + 5000 ) / 3500 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -9\nu^{7} - 56\nu^{5} - 154\nu^{3} - 625\nu ) / 1750 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -5\nu^{7} + 18\nu^{6} + 112\nu^{4} + 1008\nu^{2} + 1395\nu + 2650 ) / 1400 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -9\nu^{7} - 56\nu^{5} - 504\nu^{3} - 2025\nu ) / 1400 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 9\nu^{6} + 56\nu^{4} + 224\nu^{2} + 625 ) / 280 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 28\nu^{7} + 45\nu^{6} + 252\nu^{5} + 280\nu^{4} + 1568\nu^{3} + 2520\nu^{2} + 2800\nu + 6625 ) / 3500 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( -\beta_{7} - \beta_{5} + \beta_{4} - \beta_{3} ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( 2\beta_{7} - \beta_{6} + 2\beta_{5} + 2\beta_{4} + \beta_{2} - \beta _1 - 5 ) / 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( 2\beta_{7} - 2\beta_{5} - 2\beta_{4} + 7\beta_{3} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( -8\beta_{7} + 5\beta_{6} - 8\beta_{5} - 8\beta_{4} + 5\beta_{2} + 13\beta _1 - 11 ) / 2 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( 9\beta_{7} - 18\beta_{6} + 31\beta_{5} + 9\beta_{4} - 45\beta_{3} - 18\beta_{2} + 18\beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 28\beta_{6} - 28\beta_{2} - 28\beta _1 + 27 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( -55\beta_{7} + 112\beta_{6} - 55\beta_{5} - 57\beta_{4} - 279\beta_{3} + 112\beta_{2} - 112\beta_1 ) / 2 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/380\mathbb{Z}\right)^\times\).

\(n\) \(21\) \(77\) \(191\)
\(\chi(n)\) \(-1\) \(-\beta_{3}\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
37.1
−1.52274 1.63746i
1.52274 1.63746i
−0.656712 + 2.13746i
0.656712 + 2.13746i
1.52274 + 1.63746i
−1.52274 + 1.63746i
0.656712 2.13746i
−0.656712 2.13746i
0 0 0 −2.13746 0.656712i 0 3.52622 + 3.52622i 0 3.00000i 0
37.2 0 0 0 −2.13746 + 0.656712i 0 −1.25130 1.25130i 0 3.00000i 0
37.3 0 0 0 1.63746 1.52274i 0 −2.84677 2.84677i 0 3.00000i 0
37.4 0 0 0 1.63746 + 1.52274i 0 −2.42815 2.42815i 0 3.00000i 0
113.1 0 0 0 −2.13746 0.656712i 0 −1.25130 + 1.25130i 0 3.00000i 0
113.2 0 0 0 −2.13746 + 0.656712i 0 3.52622 3.52622i 0 3.00000i 0
113.3 0 0 0 1.63746 1.52274i 0 −2.42815 + 2.42815i 0 3.00000i 0
113.4 0 0 0 1.63746 + 1.52274i 0 −2.84677 + 2.84677i 0 3.00000i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 37.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
19.b odd 2 1 CM by \(\Q(\sqrt{-19}) \)
5.c odd 4 1 inner
95.g even 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 380.2.l.a 8
3.b odd 2 1 3420.2.bb.c 8
5.b even 2 1 1900.2.l.a 8
5.c odd 4 1 inner 380.2.l.a 8
5.c odd 4 1 1900.2.l.a 8
15.e even 4 1 3420.2.bb.c 8
19.b odd 2 1 CM 380.2.l.a 8
57.d even 2 1 3420.2.bb.c 8
95.d odd 2 1 1900.2.l.a 8
95.g even 4 1 inner 380.2.l.a 8
95.g even 4 1 1900.2.l.a 8
285.j odd 4 1 3420.2.bb.c 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
380.2.l.a 8 1.a even 1 1 trivial
380.2.l.a 8 5.c odd 4 1 inner
380.2.l.a 8 19.b odd 2 1 CM
380.2.l.a 8 95.g even 4 1 inner
1900.2.l.a 8 5.b even 2 1
1900.2.l.a 8 5.c odd 4 1
1900.2.l.a 8 95.d odd 2 1
1900.2.l.a 8 95.g even 4 1
3420.2.bb.c 8 3.b odd 2 1
3420.2.bb.c 8 15.e even 4 1
3420.2.bb.c 8 57.d even 2 1
3420.2.bb.c 8 285.j odd 4 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3} \) acting on \(S_{2}^{\mathrm{new}}(380, [\chi])\). 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
$5$ \( (T^{4} + T^{3} - 4 T^{2} + \cdots + 25)^{2} \) Copy content Toggle raw display
$7$ \( T^{8} + 6 T^{7} + \cdots + 14884 \) Copy content Toggle raw display
$11$ \( (T^{4} - 47 T^{2} + 196)^{2} \) Copy content Toggle raw display
$13$ \( T^{8} \) Copy content Toggle raw display
$17$ \( T^{8} - 14 T^{7} + \cdots + 412164 \) Copy content Toggle raw display
$19$ \( (T^{2} + 19)^{4} \) Copy content Toggle raw display
$23$ \( (T^{4} - 8 T^{3} + \cdots + 900)^{2} \) Copy content Toggle raw display
$29$ \( T^{8} \) Copy content Toggle raw display
$31$ \( T^{8} \) Copy content Toggle raw display
$37$ \( T^{8} \) Copy content Toggle raw display
$41$ \( T^{8} \) Copy content Toggle raw display
$43$ \( T^{8} - 2 T^{7} + \cdots + 2815684 \) Copy content Toggle raw display
$47$ \( T^{8} + 26 T^{7} + \cdots + 1004004 \) Copy content Toggle raw display
$53$ \( T^{8} \) Copy content Toggle raw display
$59$ \( T^{8} \) Copy content Toggle raw display
$61$ \( (T^{4} - 347 T^{2} + 26896)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( T^{8} \) Copy content Toggle raw display
$73$ \( T^{8} - 22 T^{7} + \cdots + 235991044 \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( (T^{4} + 32 T^{3} + \cdots + 8100)^{2} \) Copy content Toggle raw display
$89$ \( T^{8} \) Copy content Toggle raw display
$97$ \( T^{8} \) Copy content Toggle raw display
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