Properties

Label 760.2.bf.a
Level $760$
Weight $2$
Character orbit 760.bf
Analytic conductor $6.069$
Analytic rank $0$
Dimension $8$
CM discriminant -40
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [760,2,Mod(179,760)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(760, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([3, 3, 3, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("760.179");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 760 = 2^{3} \cdot 5 \cdot 19 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 760.bf (of order \(6\), 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: \(6.06863055362\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{6})\)
Coefficient field: 8.0.207360000.2
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - 6x^{6} + 32x^{4} - 24x^{2} + 16 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 2^{4} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{6}]$

$q$-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.

\(f(q)\) \(=\) \( q + \beta_1 q^{2} + (2 \beta_{4} + 2) q^{4} - \beta_{6} q^{5} + ( - \beta_{5} + \beta_{3} - 2 \beta_1) q^{7} - 2 \beta_{5} q^{8} + (3 \beta_{4} + 3) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_1 q^{2} + (2 \beta_{4} + 2) q^{4} - \beta_{6} q^{5} + ( - \beta_{5} + \beta_{3} - 2 \beta_1) q^{7} - 2 \beta_{5} q^{8} + (3 \beta_{4} + 3) q^{9} + (\beta_{7} - \beta_{2}) q^{10} + (\beta_{7} - 2 \beta_{2} - 1) q^{11} + (4 \beta_{5} + 4 \beta_1) q^{13} + ( - 2 \beta_{4} + \beta_{2} - 4) q^{14} + 4 \beta_{4} q^{16} - 3 \beta_{5} q^{18} + (3 \beta_{4} - \beta_{2}) q^{19} - 2 \beta_{3} q^{20} + (2 \beta_{6} - 4 \beta_{3} - \beta_1) q^{22} + (\beta_{6} - 3 \beta_{5} + \cdots + 3 \beta_1) q^{23}+ \cdots + ( - 3 \beta_{7} - 3 \beta_{4} + \cdots - 3) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 8 q^{4} + 12 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 8 q^{4} + 12 q^{9} - 8 q^{11} - 24 q^{14} - 16 q^{16} - 12 q^{19} - 20 q^{25} + 64 q^{26} - 20 q^{35} - 24 q^{36} + 12 q^{41} - 8 q^{44} + 32 q^{49} - 64 q^{64} + 32 q^{74} - 48 q^{76} - 36 q^{81} + 84 q^{89} - 96 q^{91} - 12 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} - 6x^{6} + 32x^{4} - 24x^{2} + 16 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{7} + 104\nu ) / 64 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{7} + 232\nu ) / 64 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{6} + 72 ) / 32 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 3\nu^{6} - 16\nu^{4} + 96\nu^{2} - 72 ) / 64 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -3\nu^{7} + 16\nu^{5} - 80\nu^{3} + 8\nu ) / 32 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -7\nu^{6} + 48\nu^{4} - 224\nu^{2} + 168 ) / 64 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 3\nu^{7} - 16\nu^{5} + 88\nu^{3} - 8\nu ) / 16 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{2} - \beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{6} + 3\beta_{4} - \beta_{3} + 3 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( 2\beta_{7} + 4\beta_{5} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( 6\beta_{6} + 14\beta_{4} \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( 10\beta_{7} + 22\beta_{5} - 10\beta_{2} + 22\beta_1 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 32\beta_{3} - 72 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( -52\beta_{2} + 116\beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/760\mathbb{Z}\right)^\times\).

\(n\) \(191\) \(381\) \(401\) \(457\)
\(\chi(n)\) \(-1\) \(-1\) \(1 + \beta_{4}\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
179.1
−0.756934 0.437016i
1.98168 + 1.14412i
0.756934 + 0.437016i
−1.98168 1.14412i
−0.756934 + 0.437016i
1.98168 1.14412i
0.756934 0.437016i
−1.98168 + 1.14412i
−1.22474 0.707107i 0 1.00000 + 1.73205i −1.11803 + 1.93649i 0 4.68556 2.82843i 1.50000 + 2.59808i 2.73861 1.58114i
179.2 −1.22474 0.707107i 0 1.00000 + 1.73205i 1.11803 1.93649i 0 0.213422 2.82843i 1.50000 + 2.59808i −2.73861 + 1.58114i
179.3 1.22474 + 0.707107i 0 1.00000 + 1.73205i −1.11803 + 1.93649i 0 −0.213422 2.82843i 1.50000 + 2.59808i −2.73861 + 1.58114i
179.4 1.22474 + 0.707107i 0 1.00000 + 1.73205i 1.11803 1.93649i 0 −4.68556 2.82843i 1.50000 + 2.59808i 2.73861 1.58114i
259.1 −1.22474 + 0.707107i 0 1.00000 1.73205i −1.11803 1.93649i 0 4.68556 2.82843i 1.50000 2.59808i 2.73861 + 1.58114i
259.2 −1.22474 + 0.707107i 0 1.00000 1.73205i 1.11803 + 1.93649i 0 0.213422 2.82843i 1.50000 2.59808i −2.73861 1.58114i
259.3 1.22474 0.707107i 0 1.00000 1.73205i −1.11803 1.93649i 0 −0.213422 2.82843i 1.50000 2.59808i −2.73861 1.58114i
259.4 1.22474 0.707107i 0 1.00000 1.73205i 1.11803 + 1.93649i 0 −4.68556 2.82843i 1.50000 2.59808i 2.73861 + 1.58114i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 179.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
40.e odd 2 1 CM by \(\Q(\sqrt{-10}) \)
5.b even 2 1 inner
8.d odd 2 1 inner
19.d odd 6 1 inner
95.h odd 6 1 inner
152.o even 6 1 inner
760.bf even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 760.2.bf.a 8
5.b even 2 1 inner 760.2.bf.a 8
8.d odd 2 1 inner 760.2.bf.a 8
19.d odd 6 1 inner 760.2.bf.a 8
40.e odd 2 1 CM 760.2.bf.a 8
95.h odd 6 1 inner 760.2.bf.a 8
152.o even 6 1 inner 760.2.bf.a 8
760.bf even 6 1 inner 760.2.bf.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
760.2.bf.a 8 1.a even 1 1 trivial
760.2.bf.a 8 5.b even 2 1 inner
760.2.bf.a 8 8.d odd 2 1 inner
760.2.bf.a 8 19.d odd 6 1 inner
760.2.bf.a 8 40.e odd 2 1 CM
760.2.bf.a 8 95.h odd 6 1 inner
760.2.bf.a 8 152.o even 6 1 inner
760.2.bf.a 8 760.bf even 6 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3} \) acting on \(S_{2}^{\mathrm{new}}(760, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} - 2 T^{2} + 4)^{2} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( (T^{4} + 5 T^{2} + 25)^{2} \) Copy content Toggle raw display
$7$ \( (T^{4} - 22 T^{2} + 1)^{2} \) Copy content Toggle raw display
$11$ \( (T^{2} + 2 T - 29)^{4} \) Copy content Toggle raw display
$13$ \( (T^{4} - 32 T^{2} + 1024)^{2} \) Copy content Toggle raw display
$17$ \( T^{8} \) Copy content Toggle raw display
$19$ \( (T^{4} + 6 T^{3} + \cdots + 361)^{2} \) Copy content Toggle raw display
$23$ \( T^{8} + 118 T^{6} + \cdots + 5764801 \) Copy content Toggle raw display
$29$ \( T^{8} \) Copy content Toggle raw display
$31$ \( T^{8} \) Copy content Toggle raw display
$37$ \( (T^{4} + 94 T^{2} + 289)^{2} \) Copy content Toggle raw display
$41$ \( (T^{4} - 6 T^{3} + \cdots + 1369)^{2} \) Copy content Toggle raw display
$43$ \( T^{8} \) Copy content Toggle raw display
$47$ \( (T^{4} + 180 T^{2} + 32400)^{2} \) Copy content Toggle raw display
$53$ \( T^{8} - 286 T^{6} + \cdots + 260144641 \) Copy content Toggle raw display
$59$ \( (T^{4} - 40 T^{2} + 1600)^{2} \) Copy content Toggle raw display
$61$ \( T^{8} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( T^{8} \) Copy content Toggle raw display
$73$ \( T^{8} \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( T^{8} \) Copy content Toggle raw display
$89$ \( (T^{4} - 42 T^{3} + \cdots + 11449)^{2} \) Copy content Toggle raw display
$97$ \( T^{8} \) Copy content Toggle raw display
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