Properties

Label 8649.2.a.g
Level $8649$
Weight $2$
Character orbit 8649.a
Self dual yes
Analytic conductor $69.063$
Analytic rank $0$
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] = [8649,2,Mod(1,8649)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(8649, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([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("8649.1");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 8649 = 3^{2} \cdot 31^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 8649.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: \(69.0626127082\)
Analytic rank: \(0\)
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: \(\Z[a_1, a_2]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 31)
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.

\(f(q)\) \(=\) \( q - \beta q^{2} + (\beta - 1) q^{4} + ( - \beta + 2) q^{5} + 3 q^{7} + (2 \beta - 1) q^{8} +O(q^{10}) \) Copy content Toggle raw display \( q - \beta q^{2} + (\beta - 1) q^{4} + ( - \beta + 2) q^{5} + 3 q^{7} + (2 \beta - 1) q^{8} + ( - \beta + 1) q^{10} + (2 \beta + 2) q^{11} + ( - 3 \beta + 3) q^{13} - 3 \beta q^{14} - 3 \beta q^{16} + (2 \beta + 1) q^{17} + 5 q^{19} + (2 \beta - 3) q^{20} + ( - 4 \beta - 2) q^{22} + ( - 4 \beta + 3) q^{23} - 3 \beta q^{25} + 3 q^{26} + (3 \beta - 3) q^{28} + ( - \beta + 8) q^{29} + ( - \beta + 5) q^{32} + ( - 3 \beta - 2) q^{34} + ( - 3 \beta + 6) q^{35} + ( - 2 \beta - 1) q^{37} - 5 \beta q^{38} + (3 \beta - 4) q^{40} + (4 \beta - 4) q^{41} + (\beta - 4) q^{43} + 2 \beta q^{44} + (\beta + 4) q^{46} + (\beta + 4) q^{47} + 2 q^{49} + (3 \beta + 3) q^{50} + (3 \beta - 6) q^{52} + ( - 6 \beta + 9) q^{53} + 2 q^{55} + (6 \beta - 3) q^{56} + ( - 7 \beta + 1) q^{58} + (4 \beta - 7) q^{59} + (8 \beta - 2) q^{61} + (2 \beta + 1) q^{64} + ( - 6 \beta + 9) q^{65} + (2 \beta - 3) q^{67} + (\beta + 1) q^{68} + ( - 3 \beta + 3) q^{70} + (5 \beta + 3) q^{71} + (9 \beta - 3) q^{73} + (3 \beta + 2) q^{74} + (5 \beta - 5) q^{76} + (6 \beta + 6) q^{77} + ( - 3 \beta + 3) q^{80} - 4 q^{82} + ( - 5 \beta + 1) q^{83} + \beta q^{85} + (3 \beta - 1) q^{86} + (6 \beta + 2) q^{88} + (\beta + 7) q^{89} + ( - 9 \beta + 9) q^{91} + (3 \beta - 7) q^{92} + ( - 5 \beta - 1) q^{94} + ( - 5 \beta + 10) q^{95} + ( - 6 \beta - 9) q^{97} - 2 \beta q^{98} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - q^{2} - q^{4} + 3 q^{5} + 6 q^{7}+O(q^{10}) \) Copy content Toggle raw display \( 2 q - q^{2} - q^{4} + 3 q^{5} + 6 q^{7} + q^{10} + 6 q^{11} + 3 q^{13} - 3 q^{14} - 3 q^{16} + 4 q^{17} + 10 q^{19} - 4 q^{20} - 8 q^{22} + 2 q^{23} - 3 q^{25} + 6 q^{26} - 3 q^{28} + 15 q^{29} + 9 q^{32} - 7 q^{34} + 9 q^{35} - 4 q^{37} - 5 q^{38} - 5 q^{40} - 4 q^{41} - 7 q^{43} + 2 q^{44} + 9 q^{46} + 9 q^{47} + 4 q^{49} + 9 q^{50} - 9 q^{52} + 12 q^{53} + 4 q^{55} - 5 q^{58} - 10 q^{59} + 4 q^{61} + 4 q^{64} + 12 q^{65} - 4 q^{67} + 3 q^{68} + 3 q^{70} + 11 q^{71} + 3 q^{73} + 7 q^{74} - 5 q^{76} + 18 q^{77} + 3 q^{80} - 8 q^{82} - 3 q^{83} + q^{85} + q^{86} + 10 q^{88} + 15 q^{89} + 9 q^{91} - 11 q^{92} - 7 q^{94} + 15 q^{95} - 24 q^{97} - 2 q^{98}+O(q^{100}) \) 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
1.61803
−0.618034
−1.61803 0 0.618034 0.381966 0 3.00000 2.23607 0 −0.618034
1.2 0.618034 0 −1.61803 2.61803 0 3.00000 −2.23607 0 1.61803
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(3\) \(-1\)
\(31\) \(1\)

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 8649.2.a.g 2
3.b odd 2 1 961.2.a.d 2
31.b odd 2 1 8649.2.a.f 2
31.d even 5 2 279.2.i.a 4
93.c even 2 1 961.2.a.e 2
93.g even 6 2 961.2.c.d 4
93.h odd 6 2 961.2.c.f 4
93.k even 10 2 961.2.d.b 4
93.k even 10 2 961.2.d.e 4
93.l odd 10 2 31.2.d.a 4
93.l odd 10 2 961.2.d.f 4
93.o odd 30 4 961.2.g.b 8
93.o odd 30 4 961.2.g.f 8
93.p even 30 4 961.2.g.c 8
93.p even 30 4 961.2.g.g 8
372.t even 10 2 496.2.n.b 4
465.x odd 10 2 775.2.k.c 4
465.bj even 20 4 775.2.bf.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
31.2.d.a 4 93.l odd 10 2
279.2.i.a 4 31.d even 5 2
496.2.n.b 4 372.t even 10 2
775.2.k.c 4 465.x odd 10 2
775.2.bf.a 8 465.bj even 20 4
961.2.a.d 2 3.b odd 2 1
961.2.a.e 2 93.c even 2 1
961.2.c.d 4 93.g even 6 2
961.2.c.f 4 93.h odd 6 2
961.2.d.b 4 93.k even 10 2
961.2.d.e 4 93.k even 10 2
961.2.d.f 4 93.l odd 10 2
961.2.g.b 8 93.o odd 30 4
961.2.g.c 8 93.p even 30 4
961.2.g.f 8 93.o odd 30 4
961.2.g.g 8 93.p even 30 4
8649.2.a.f 2 31.b odd 2 1
8649.2.a.g 2 1.a even 1 1 trivial

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(8649))\):

\( T_{2}^{2} + T_{2} - 1 \) Copy content Toggle raw display
\( T_{5}^{2} - 3T_{5} + 1 \) Copy content Toggle raw display
\( T_{7} - 3 \) Copy content Toggle raw display
\( T_{11}^{2} - 6T_{11} + 4 \) Copy content Toggle raw display
\( T_{13}^{2} - 3T_{13} - 9 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} + T - 1 \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( T^{2} - 3T + 1 \) Copy content Toggle raw display
$7$ \( (T - 3)^{2} \) Copy content Toggle raw display
$11$ \( T^{2} - 6T + 4 \) Copy content Toggle raw display
$13$ \( T^{2} - 3T - 9 \) Copy content Toggle raw display
$17$ \( T^{2} - 4T - 1 \) Copy content Toggle raw display
$19$ \( (T - 5)^{2} \) Copy content Toggle raw display
$23$ \( T^{2} - 2T - 19 \) Copy content Toggle raw display
$29$ \( T^{2} - 15T + 55 \) Copy content Toggle raw display
$31$ \( T^{2} \) Copy content Toggle raw display
$37$ \( T^{2} + 4T - 1 \) Copy content Toggle raw display
$41$ \( T^{2} + 4T - 16 \) Copy content Toggle raw display
$43$ \( T^{2} + 7T + 11 \) Copy content Toggle raw display
$47$ \( T^{2} - 9T + 19 \) Copy content Toggle raw display
$53$ \( T^{2} - 12T - 9 \) Copy content Toggle raw display
$59$ \( T^{2} + 10T + 5 \) Copy content Toggle raw display
$61$ \( T^{2} - 4T - 76 \) Copy content Toggle raw display
$67$ \( T^{2} + 4T - 1 \) Copy content Toggle raw display
$71$ \( T^{2} - 11T - 1 \) Copy content Toggle raw display
$73$ \( T^{2} - 3T - 99 \) Copy content Toggle raw display
$79$ \( T^{2} \) Copy content Toggle raw display
$83$ \( T^{2} + 3T - 29 \) Copy content Toggle raw display
$89$ \( T^{2} - 15T + 55 \) Copy content Toggle raw display
$97$ \( T^{2} + 24T + 99 \) Copy content Toggle raw display
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