Properties

Label 385.2.h.b
Level $385$
Weight $2$
Character orbit 385.h
Analytic conductor $3.074$
Analytic rank $0$
Dimension $8$
CM discriminant -55
Inner twists $8$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [385,2,Mod(384,385)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(385, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 1, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("385.384");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 385 = 5 \cdot 7 \cdot 11 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 385.h (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: \(3.07424047782\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.599695360000.19
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - 3x^{4} + 16 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{2} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{2}]$

$q$-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.

\(f(q)\) \(=\) \( q + \beta_{6} q^{2} + (\beta_{5} + 2) q^{4} + \beta_1 q^{5} - \beta_{2} q^{7} + (3 \beta_{6} - \beta_{4} + \beta_{2}) q^{8} - 3 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{6} q^{2} + (\beta_{5} + 2) q^{4} + \beta_1 q^{5} - \beta_{2} q^{7} + (3 \beta_{6} - \beta_{4} + \beta_{2}) q^{8} - 3 q^{9} + (\beta_{7} + \beta_{4} + \beta_{2}) q^{10} - \beta_{5} q^{11} + (2 \beta_{7} - \beta_{4} - \beta_{2}) q^{13} + ( - \beta_{3} - \beta_1 + 1) q^{14} + (2 \beta_{5} + 7) q^{16} + (2 \beta_{7} + \beta_{4} + \beta_{2}) q^{17} - 3 \beta_{6} q^{18} + ( - \beta_{5} + 2 \beta_{3} + \beta_1 - 1) q^{20} + ( - 3 \beta_{6} + \beta_{4} - \beta_{2}) q^{22} - 5 q^{25} + (\beta_{5} - 2 \beta_{3} + 1) q^{26} + ( - \beta_{7} - \beta_{6} + \cdots - 2 \beta_{2}) q^{28}+ \cdots + 3 \beta_{5} q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 16 q^{4} - 24 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 16 q^{4} - 24 q^{9} + 4 q^{14} + 56 q^{16} - 40 q^{25} - 48 q^{36} - 88 q^{44} - 44 q^{56} + 112 q^{64} + 60 q^{70} - 64 q^{71} + 72 q^{81} + 136 q^{86} - 48 q^{91}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} - 3x^{4} + 16 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{6} + \nu^{2} ) / 4 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{7} + 5\nu^{3} ) / 8 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{4} + \nu^{2} - 1 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( \nu^{5} - \nu ) / 2 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -\nu^{6} + 7\nu^{2} ) / 4 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -\nu^{7} + 3\nu^{3} + 8\nu ) / 8 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{7} - 3\nu^{3} + 8\nu ) / 8 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{7} + \beta_{6} ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{5} + \beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -\beta_{7} + \beta_{6} + 2\beta_{2} ) / 2 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( -\beta_{5} + 2\beta_{3} - \beta _1 + 2 ) / 2 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( \beta_{7} + \beta_{6} + 4\beta_{4} ) / 2 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( -\beta_{5} + 7\beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( 5\beta_{7} - 5\beta_{6} + 6\beta_{2} ) / 2 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/385\mathbb{Z}\right)^\times\).

\(n\) \(211\) \(232\) \(276\)
\(\chi(n)\) \(-1\) \(-1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
384.1
−1.35246 + 0.413333i
−1.35246 0.413333i
−0.413333 + 1.35246i
−0.413333 1.35246i
0.413333 1.35246i
0.413333 + 1.35246i
1.35246 0.413333i
1.35246 + 0.413333i
−2.70493 0 5.31662 2.23607i 0 0.428223 2.61087i −8.97122 −3.00000 6.04840i
384.2 −2.70493 0 5.31662 2.23607i 0 0.428223 + 2.61087i −8.97122 −3.00000 6.04840i
384.3 −0.826665 0 −1.31662 2.23607i 0 −2.61087 + 0.428223i 2.74174 −3.00000 1.84848i
384.4 −0.826665 0 −1.31662 2.23607i 0 −2.61087 0.428223i 2.74174 −3.00000 1.84848i
384.5 0.826665 0 −1.31662 2.23607i 0 2.61087 0.428223i −2.74174 −3.00000 1.84848i
384.6 0.826665 0 −1.31662 2.23607i 0 2.61087 + 0.428223i −2.74174 −3.00000 1.84848i
384.7 2.70493 0 5.31662 2.23607i 0 −0.428223 + 2.61087i 8.97122 −3.00000 6.04840i
384.8 2.70493 0 5.31662 2.23607i 0 −0.428223 2.61087i 8.97122 −3.00000 6.04840i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 384.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
55.d odd 2 1 CM by \(\Q(\sqrt{-55}) \)
5.b even 2 1 inner
7.b odd 2 1 inner
11.b odd 2 1 inner
35.c odd 2 1 inner
77.b even 2 1 inner
385.h even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 385.2.h.b 8
5.b even 2 1 inner 385.2.h.b 8
7.b odd 2 1 inner 385.2.h.b 8
11.b odd 2 1 inner 385.2.h.b 8
35.c odd 2 1 inner 385.2.h.b 8
55.d odd 2 1 CM 385.2.h.b 8
77.b even 2 1 inner 385.2.h.b 8
385.h even 2 1 inner 385.2.h.b 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
385.2.h.b 8 1.a even 1 1 trivial
385.2.h.b 8 5.b even 2 1 inner
385.2.h.b 8 7.b odd 2 1 inner
385.2.h.b 8 11.b odd 2 1 inner
385.2.h.b 8 35.c odd 2 1 inner
385.2.h.b 8 55.d odd 2 1 CM
385.2.h.b 8 77.b even 2 1 inner
385.2.h.b 8 385.h even 2 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2}^{4} - 8T_{2}^{2} + 5 \) acting on \(S_{2}^{\mathrm{new}}(385, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} - 8 T^{2} + 5)^{2} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( (T^{2} + 5)^{4} \) Copy content Toggle raw display
$7$ \( T^{8} - 78T^{4} + 2401 \) Copy content Toggle raw display
$11$ \( (T^{2} - 11)^{4} \) Copy content Toggle raw display
$13$ \( (T^{4} + 52 T^{2} + 500)^{2} \) Copy content Toggle raw display
$17$ \( (T^{4} + 68 T^{2} + 980)^{2} \) Copy content Toggle raw display
$19$ \( T^{8} \) Copy content Toggle raw display
$23$ \( T^{8} \) Copy content Toggle raw display
$29$ \( T^{8} \) Copy content Toggle raw display
$31$ \( (T^{2} + 80)^{4} \) Copy content Toggle raw display
$37$ \( T^{8} \) Copy content Toggle raw display
$41$ \( T^{8} \) Copy content Toggle raw display
$43$ \( (T^{4} - 172 T^{2} + 7220)^{2} \) Copy content Toggle raw display
$47$ \( T^{8} \) Copy content Toggle raw display
$53$ \( T^{8} \) Copy content Toggle raw display
$59$ \( (T^{2} + 220)^{4} \) Copy content Toggle raw display
$61$ \( T^{8} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( (T + 8)^{8} \) Copy content Toggle raw display
$73$ \( (T^{4} + 292 T^{2} + 20)^{2} \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( (T^{4} + 332 T^{2} + 27380)^{2} \) Copy content Toggle raw display
$89$ \( (T^{2} + 180)^{4} \) Copy content Toggle raw display
$97$ \( T^{8} \) Copy content Toggle raw display
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