Properties

Label 8712.2.a.bm
Level $8712$
Weight $2$
Character orbit 8712.a
Self dual yes
Analytic conductor $69.566$
Analytic rank $1$
Dimension $2$
CM no
Inner twists $1$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [8712,2,Mod(1,8712)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(8712, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 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("8712.1");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 8712 = 2^{3} \cdot 3^{2} \cdot 11^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 8712.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: \(69.5656702409\)
Analytic rank: \(1\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{5}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - x - 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 88)
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 \(\beta = \frac{1}{2}(1 + \sqrt{5})\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \beta q^{5} + (\beta - 1) q^{7}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta q^{5} + (\beta - 1) q^{7} + ( - 3 \beta + 4) q^{13} + 3 \beta q^{17} + (3 \beta - 3) q^{19} + 4 q^{23} + (\beta - 4) q^{25} + ( - 7 \beta + 3) q^{29} + ( - 5 \beta - 2) q^{31} + q^{35} + (\beta - 9) q^{37} + (\beta - 9) q^{41} + ( - 4 \beta - 4) q^{43} + ( - 9 \beta + 5) q^{47} + ( - \beta - 5) q^{49} + \beta q^{53} + (\beta + 3) q^{59} - 3 \beta q^{61} + (\beta - 3) q^{65} + (4 \beta - 12) q^{67} + ( - 5 \beta + 2) q^{71} + (3 \beta + 5) q^{73} + ( - 3 \beta + 2) q^{79} + (\beta + 10) q^{83} + (3 \beta + 3) q^{85} + ( - 4 \beta + 2) q^{89} + (4 \beta - 7) q^{91} + 3 q^{95} + (7 \beta - 8) q^{97} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q + q^{5} - q^{7}+O(q^{10}) \) Copy content Toggle raw display \( 2 q + q^{5} - q^{7} + 5 q^{13} + 3 q^{17} - 3 q^{19} + 8 q^{23} - 7 q^{25} - q^{29} - 9 q^{31} + 2 q^{35} - 17 q^{37} - 17 q^{41} - 12 q^{43} + q^{47} - 11 q^{49} + q^{53} + 7 q^{59} - 3 q^{61} - 5 q^{65} - 20 q^{67} - q^{71} + 13 q^{73} + q^{79} + 21 q^{83} + 9 q^{85} - 10 q^{91} + 6 q^{95} - 9 q^{97}+O(q^{100}) \) 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
−0.618034
1.61803
0 0 0 −0.618034 0 −1.61803 0 0 0
1.2 0 0 0 1.61803 0 0.618034 0 0 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \(1\)
\(3\) \(-1\)
\(11\) \(-1\)

Inner twists

This newform does not admit any (nontrivial) inner twists.

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 8712.2.a.bm 2
3.b odd 2 1 968.2.a.h 2
11.b odd 2 1 8712.2.a.bp 2
11.d odd 10 2 792.2.r.b 4
12.b even 2 1 1936.2.a.u 2
24.f even 2 1 7744.2.a.cc 2
24.h odd 2 1 7744.2.a.cq 2
33.d even 2 1 968.2.a.i 2
33.f even 10 2 88.2.i.a 4
33.f even 10 2 968.2.i.d 4
33.h odd 10 2 968.2.i.c 4
33.h odd 10 2 968.2.i.k 4
132.d odd 2 1 1936.2.a.t 2
132.n odd 10 2 176.2.m.a 4
264.m even 2 1 7744.2.a.cr 2
264.p odd 2 1 7744.2.a.cb 2
264.r odd 10 2 704.2.m.g 4
264.u even 10 2 704.2.m.b 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
88.2.i.a 4 33.f even 10 2
176.2.m.a 4 132.n odd 10 2
704.2.m.b 4 264.u even 10 2
704.2.m.g 4 264.r odd 10 2
792.2.r.b 4 11.d odd 10 2
968.2.a.h 2 3.b odd 2 1
968.2.a.i 2 33.d even 2 1
968.2.i.c 4 33.h odd 10 2
968.2.i.d 4 33.f even 10 2
968.2.i.k 4 33.h odd 10 2
1936.2.a.t 2 132.d odd 2 1
1936.2.a.u 2 12.b even 2 1
7744.2.a.cb 2 264.p odd 2 1
7744.2.a.cc 2 24.f even 2 1
7744.2.a.cq 2 24.h odd 2 1
7744.2.a.cr 2 264.m even 2 1
8712.2.a.bm 2 1.a even 1 1 trivial
8712.2.a.bp 2 11.b odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(8712))\):

\( T_{5}^{2} - T_{5} - 1 \) Copy content Toggle raw display
\( T_{7}^{2} + T_{7} - 1 \) Copy content Toggle raw display
\( T_{13}^{2} - 5T_{13} - 5 \) Copy content Toggle raw display
\( T_{17}^{2} - 3T_{17} - 9 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( T^{2} - T - 1 \) Copy content Toggle raw display
$7$ \( T^{2} + T - 1 \) Copy content Toggle raw display
$11$ \( T^{2} \) Copy content Toggle raw display
$13$ \( T^{2} - 5T - 5 \) Copy content Toggle raw display
$17$ \( T^{2} - 3T - 9 \) Copy content Toggle raw display
$19$ \( T^{2} + 3T - 9 \) Copy content Toggle raw display
$23$ \( (T - 4)^{2} \) Copy content Toggle raw display
$29$ \( T^{2} + T - 61 \) Copy content Toggle raw display
$31$ \( T^{2} + 9T - 11 \) Copy content Toggle raw display
$37$ \( T^{2} + 17T + 71 \) Copy content Toggle raw display
$41$ \( T^{2} + 17T + 71 \) Copy content Toggle raw display
$43$ \( T^{2} + 12T + 16 \) Copy content Toggle raw display
$47$ \( T^{2} - T - 101 \) Copy content Toggle raw display
$53$ \( T^{2} - T - 1 \) Copy content Toggle raw display
$59$ \( T^{2} - 7T + 11 \) Copy content Toggle raw display
$61$ \( T^{2} + 3T - 9 \) Copy content Toggle raw display
$67$ \( T^{2} + 20T + 80 \) Copy content Toggle raw display
$71$ \( T^{2} + T - 31 \) Copy content Toggle raw display
$73$ \( T^{2} - 13T + 31 \) Copy content Toggle raw display
$79$ \( T^{2} - T - 11 \) Copy content Toggle raw display
$83$ \( T^{2} - 21T + 109 \) Copy content Toggle raw display
$89$ \( T^{2} - 20 \) Copy content Toggle raw display
$97$ \( T^{2} + 9T - 41 \) Copy content Toggle raw display
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