Properties

Label 3920.2.a.bt
Level $3920$
Weight $2$
Character orbit 3920.a
Self dual yes
Analytic conductor $31.301$
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] = [3920,2,Mod(1,3920)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(3920, 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("3920.1");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 3920 = 2^{4} \cdot 5 \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 3920.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: \(31.3013575923\)
Analytic rank: \(1\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{33}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - x - 8 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 280)
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 \(\beta = \frac{1}{2}(1 + \sqrt{33})\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta q^{3} + q^{5} + (\beta + 5) q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q - \beta q^{3} + q^{5} + (\beta + 5) q^{9} + (\beta - 4) q^{11} + (\beta - 2) q^{13} - \beta q^{15} + ( - \beta - 2) q^{17} + 2 \beta q^{19} - 2 \beta q^{23} + q^{25} + ( - 3 \beta - 8) q^{27} + (\beta - 2) q^{29} - 8 q^{31} + (3 \beta - 8) q^{33} - 2 q^{37} + (\beta - 8) q^{39} + (2 \beta - 2) q^{41} + ( - 2 \beta + 4) q^{43} + (\beta + 5) q^{45} + 3 \beta q^{47} + (3 \beta + 8) q^{51} + ( - 2 \beta + 6) q^{53} + (\beta - 4) q^{55} + ( - 2 \beta - 16) q^{57} + 8 q^{59} + ( - 2 \beta - 2) q^{61} + (\beta - 2) q^{65} + 4 q^{67} + (2 \beta + 16) q^{69} - 8 q^{71} + 6 q^{73} - \beta q^{75} + (3 \beta - 8) q^{79} + (8 \beta + 9) q^{81} + 4 \beta q^{83} + ( - \beta - 2) q^{85} + (\beta - 8) q^{87} + (2 \beta - 10) q^{89} + 8 \beta q^{93} + 2 \beta q^{95} + ( - 5 \beta - 2) q^{97} + (2 \beta - 12) q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - q^{3} + 2 q^{5} + 11 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 2 q - q^{3} + 2 q^{5} + 11 q^{9} - 7 q^{11} - 3 q^{13} - q^{15} - 5 q^{17} + 2 q^{19} - 2 q^{23} + 2 q^{25} - 19 q^{27} - 3 q^{29} - 16 q^{31} - 13 q^{33} - 4 q^{37} - 15 q^{39} - 2 q^{41} + 6 q^{43} + 11 q^{45} + 3 q^{47} + 19 q^{51} + 10 q^{53} - 7 q^{55} - 34 q^{57} + 16 q^{59} - 6 q^{61} - 3 q^{65} + 8 q^{67} + 34 q^{69} - 16 q^{71} + 12 q^{73} - q^{75} - 13 q^{79} + 26 q^{81} + 4 q^{83} - 5 q^{85} - 15 q^{87} - 18 q^{89} + 8 q^{93} + 2 q^{95} - 9 q^{97} - 22 q^{99}+O(q^{100}) \) 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
3.37228
−2.37228
0 −3.37228 0 1.00000 0 0 0 8.37228 0
1.2 0 2.37228 0 1.00000 0 0 0 2.62772 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \(1\)
\(5\) \(-1\)
\(7\) \(-1\)

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 3920.2.a.bt 2
4.b odd 2 1 1960.2.a.s 2
7.b odd 2 1 560.2.a.h 2
20.d odd 2 1 9800.2.a.bu 2
21.c even 2 1 5040.2.a.by 2
28.d even 2 1 280.2.a.c 2
28.f even 6 2 1960.2.q.t 4
28.g odd 6 2 1960.2.q.r 4
35.c odd 2 1 2800.2.a.bk 2
35.f even 4 2 2800.2.g.r 4
56.e even 2 1 2240.2.a.bk 2
56.h odd 2 1 2240.2.a.bg 2
84.h odd 2 1 2520.2.a.x 2
140.c even 2 1 1400.2.a.r 2
140.j odd 4 2 1400.2.g.i 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
280.2.a.c 2 28.d even 2 1
560.2.a.h 2 7.b odd 2 1
1400.2.a.r 2 140.c even 2 1
1400.2.g.i 4 140.j odd 4 2
1960.2.a.s 2 4.b odd 2 1
1960.2.q.r 4 28.g odd 6 2
1960.2.q.t 4 28.f even 6 2
2240.2.a.bg 2 56.h odd 2 1
2240.2.a.bk 2 56.e even 2 1
2520.2.a.x 2 84.h odd 2 1
2800.2.a.bk 2 35.c odd 2 1
2800.2.g.r 4 35.f even 4 2
3920.2.a.bt 2 1.a even 1 1 trivial
5040.2.a.by 2 21.c even 2 1
9800.2.a.bu 2 20.d odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(3920))\):

\( T_{3}^{2} + T_{3} - 8 \) Copy content Toggle raw display
\( T_{11}^{2} + 7T_{11} + 4 \) Copy content Toggle raw display
\( T_{13}^{2} + 3T_{13} - 6 \) Copy content Toggle raw display
\( T_{17}^{2} + 5T_{17} - 2 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} \) Copy content Toggle raw display
$3$ \( T^{2} + T - 8 \) Copy content Toggle raw display
$5$ \( (T - 1)^{2} \) Copy content Toggle raw display
$7$ \( T^{2} \) Copy content Toggle raw display
$11$ \( T^{2} + 7T + 4 \) Copy content Toggle raw display
$13$ \( T^{2} + 3T - 6 \) Copy content Toggle raw display
$17$ \( T^{2} + 5T - 2 \) Copy content Toggle raw display
$19$ \( T^{2} - 2T - 32 \) Copy content Toggle raw display
$23$ \( T^{2} + 2T - 32 \) Copy content Toggle raw display
$29$ \( T^{2} + 3T - 6 \) Copy content Toggle raw display
$31$ \( (T + 8)^{2} \) Copy content Toggle raw display
$37$ \( (T + 2)^{2} \) Copy content Toggle raw display
$41$ \( T^{2} + 2T - 32 \) Copy content Toggle raw display
$43$ \( T^{2} - 6T - 24 \) Copy content Toggle raw display
$47$ \( T^{2} - 3T - 72 \) Copy content Toggle raw display
$53$ \( T^{2} - 10T - 8 \) Copy content Toggle raw display
$59$ \( (T - 8)^{2} \) Copy content Toggle raw display
$61$ \( T^{2} + 6T - 24 \) Copy content Toggle raw display
$67$ \( (T - 4)^{2} \) Copy content Toggle raw display
$71$ \( (T + 8)^{2} \) Copy content Toggle raw display
$73$ \( (T - 6)^{2} \) Copy content Toggle raw display
$79$ \( T^{2} + 13T - 32 \) Copy content Toggle raw display
$83$ \( T^{2} - 4T - 128 \) Copy content Toggle raw display
$89$ \( T^{2} + 18T + 48 \) Copy content Toggle raw display
$97$ \( T^{2} + 9T - 186 \) Copy content Toggle raw display
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