Properties

Label 4020.2.a.c
Level $4020$
Weight $2$
Character orbit 4020.a
Self dual yes
Analytic conductor $32.100$
Analytic rank $1$
Dimension $4$
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] = [4020,2,Mod(1,4020)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(4020, 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("4020.1");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 4020 = 2^{2} \cdot 3 \cdot 5 \cdot 67 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 4020.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: \(32.0998616126\)
Analytic rank: \(1\)
Dimension: \(4\)
Coefficient field: 4.4.98117.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{3} - 8x^{2} + 4x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
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 a basis \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + q^{3} - q^{5} + \beta_1 q^{7} + q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + q^{3} - q^{5} + \beta_1 q^{7} + q^{9} + (\beta_{3} - \beta_1 - 1) q^{11} + ( - \beta_{2} - 1) q^{13} - q^{15} + ( - \beta_{3} + \beta_{2} - \beta_1 - 2) q^{17} + ( - \beta_{3} + \beta_{2} + 1) q^{19} + \beta_1 q^{21} - 3 q^{23} + q^{25} + q^{27} + ( - \beta_1 - 1) q^{29} + ( - \beta_{3} - \beta_{2}) q^{31} + (\beta_{3} - \beta_1 - 1) q^{33} - \beta_1 q^{35} + (2 \beta_1 + 3) q^{37} + ( - \beta_{2} - 1) q^{39} + (\beta_{3} - \beta_{2} - 4) q^{41} + (2 \beta_{3} - \beta_{2} - 2) q^{43} - q^{45} + ( - 2 \beta_{3} + \beta_{2} - 4 \beta_1 - 1) q^{47} + ( - \beta_{3} + \beta_{2} - 3) q^{49} + ( - \beta_{3} + \beta_{2} - \beta_1 - 2) q^{51} + (\beta_{3} + \beta_{2} - 1) q^{53} + ( - \beta_{3} + \beta_1 + 1) q^{55} + ( - \beta_{3} + \beta_{2} + 1) q^{57} + (\beta_{2} + 4 \beta_1 - 7) q^{59} + ( - \beta_{3} + \beta_{2} - 7) q^{61} + \beta_1 q^{63} + (\beta_{2} + 1) q^{65} - q^{67} - 3 q^{69} + (\beta_{3} - 2 \beta_{2} + 2 \beta_1 - 5) q^{71} + (\beta_{3} + \beta_{2} - 3 \beta_1) q^{73} + q^{75} + (\beta_{3} - \beta_{2} - 2 \beta_1 - 5) q^{77} + ( - \beta_{2} - 4) q^{79} + q^{81} + ( - 3 \beta_{3} - 2 \beta_1 + 3) q^{83} + (\beta_{3} - \beta_{2} + \beta_1 + 2) q^{85} + ( - \beta_1 - 1) q^{87} + (5 \beta_{3} + 2 \beta_1 - 5) q^{89} + ( - \beta_{2} - 4 \beta_1) q^{91} + ( - \beta_{3} - \beta_{2}) q^{93} + (\beta_{3} - \beta_{2} - 1) q^{95} + (3 \beta_{3} + 5 \beta_1 - 4) q^{97} + (\beta_{3} - \beta_1 - 1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 4 q^{3} - 4 q^{5} + q^{7} + 4 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 4 q + 4 q^{3} - 4 q^{5} + q^{7} + 4 q^{9} - 5 q^{11} - 5 q^{13} - 4 q^{15} - 8 q^{17} + 5 q^{19} + q^{21} - 12 q^{23} + 4 q^{25} + 4 q^{27} - 5 q^{29} - q^{31} - 5 q^{33} - q^{35} + 14 q^{37} - 5 q^{39} - 17 q^{41} - 9 q^{43} - 4 q^{45} - 7 q^{47} - 11 q^{49} - 8 q^{51} - 3 q^{53} + 5 q^{55} + 5 q^{57} - 23 q^{59} - 27 q^{61} + q^{63} + 5 q^{65} - 4 q^{67} - 12 q^{69} - 20 q^{71} - 2 q^{73} + 4 q^{75} - 23 q^{77} - 17 q^{79} + 4 q^{81} + 10 q^{83} + 8 q^{85} - 5 q^{87} - 18 q^{89} - 5 q^{91} - q^{93} - 5 q^{95} - 11 q^{97} - 5 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} - x^{3} - 8x^{2} + 4x + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{3} - 8\nu - 1 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{3} - \nu^{2} - 8\nu + 3 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( -\beta_{3} + \beta_{2} + 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{2} + 8\beta _1 + 1 \) 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
−2.60457
−0.184077
0.668475
3.12017
0 1.00000 0 −1.00000 0 −2.60457 0 1.00000 0
1.2 0 1.00000 0 −1.00000 0 −0.184077 0 1.00000 0
1.3 0 1.00000 0 −1.00000 0 0.668475 0 1.00000 0
1.4 0 1.00000 0 −1.00000 0 3.12017 0 1.00000 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \(-1\)
\(3\) \(-1\)
\(5\) \(1\)
\(67\) \(1\)

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 4020.2.a.c 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
4020.2.a.c 4 1.a even 1 1 trivial

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{7}^{4} - T_{7}^{3} - 8T_{7}^{2} + 4T_{7} + 1 \) acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(4020))\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( (T - 1)^{4} \) Copy content Toggle raw display
$5$ \( (T + 1)^{4} \) Copy content Toggle raw display
$7$ \( T^{4} - T^{3} - 8 T^{2} + \cdots + 1 \) Copy content Toggle raw display
$11$ \( T^{4} + 5 T^{3} + \cdots + 81 \) Copy content Toggle raw display
$13$ \( T^{4} + 5 T^{3} + \cdots - 127 \) Copy content Toggle raw display
$17$ \( T^{4} + 8 T^{3} + \cdots + 75 \) Copy content Toggle raw display
$19$ \( T^{4} - 5 T^{3} + \cdots + 193 \) Copy content Toggle raw display
$23$ \( (T + 3)^{4} \) Copy content Toggle raw display
$29$ \( T^{4} + 5 T^{3} + \cdots - 9 \) Copy content Toggle raw display
$31$ \( T^{4} + T^{3} + \cdots - 201 \) Copy content Toggle raw display
$37$ \( T^{4} - 14 T^{3} + \cdots - 233 \) Copy content Toggle raw display
$41$ \( T^{4} + 17 T^{3} + \cdots + 1 \) Copy content Toggle raw display
$43$ \( T^{4} + 9 T^{3} + \cdots - 295 \) Copy content Toggle raw display
$47$ \( T^{4} + 7 T^{3} + \cdots - 3375 \) Copy content Toggle raw display
$53$ \( T^{4} + 3 T^{3} + \cdots - 43 \) Copy content Toggle raw display
$59$ \( T^{4} + 23 T^{3} + \cdots - 11383 \) Copy content Toggle raw display
$61$ \( T^{4} + 27 T^{3} + \cdots + 617 \) Copy content Toggle raw display
$67$ \( (T + 1)^{4} \) Copy content Toggle raw display
$71$ \( T^{4} + 20 T^{3} + \cdots - 1499 \) Copy content Toggle raw display
$73$ \( T^{4} + 2 T^{3} + \cdots + 3375 \) Copy content Toggle raw display
$79$ \( T^{4} + 17 T^{3} + \cdots - 475 \) Copy content Toggle raw display
$83$ \( T^{4} - 10 T^{3} + \cdots - 659 \) Copy content Toggle raw display
$89$ \( T^{4} + 18 T^{3} + \cdots - 19319 \) Copy content Toggle raw display
$97$ \( T^{4} + 11 T^{3} + \cdots + 9837 \) Copy content Toggle raw display
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