Properties

Label 3420.2.t.r
Level $3420$
Weight $2$
Character orbit 3420.t
Analytic conductor $27.309$
Analytic rank $0$
Dimension $4$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [3420,2,Mod(1261,3420)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(3420, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([0, 0, 0, 2]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("3420.1261");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 3420 = 2^{2} \cdot 3^{2} \cdot 5 \cdot 19 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 3420.t (of order \(3\), 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: \(27.3088374913\)
Analytic rank: \(0\)
Dimension: \(4\)
Relative dimension: \(2\) over \(\Q(\zeta_{3})\)
Coefficient field: \(\Q(\sqrt{-3}, \sqrt{5})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{3} + 2x^{2} + x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{2} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{3}]$

$q$-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.

\(f(q)\) \(=\) \( q + ( - \beta_1 - 1) q^{5} + ( - \beta_{3} - 2) q^{7}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - \beta_1 - 1) q^{5} + ( - \beta_{3} - 2) q^{7} - 2 q^{11} + \beta_1 q^{13} + (2 \beta_{2} + 2 \beta_1 + 2) q^{17} + ( - \beta_{3} - 2 \beta_{2} + 2) q^{19} + 6 \beta_1 q^{23} + \beta_1 q^{25} - 4 \beta_1 q^{29} + (\beta_{3} - 4) q^{31} + ( - \beta_{2} + 2 \beta_1 + 2) q^{35} + 3 q^{37} + ( - 2 \beta_{2} + 2 \beta_1 + 2) q^{41} + ( - \beta_{2} - 8 \beta_1 - 8) q^{43} + (2 \beta_{3} + 2 \beta_{2} - 2 \beta_1) q^{47} + (4 \beta_{3} + 2) q^{49} + (4 \beta_{3} + 4 \beta_{2} + 2 \beta_1) q^{53} + (2 \beta_1 + 2) q^{55} + ( - 2 \beta_{2} + 4 \beta_1 + 4) q^{59} + ( - 2 \beta_{3} - 2 \beta_{2} + \beta_1) q^{61} + q^{65} + (\beta_{3} + \beta_{2} + 4 \beta_1) q^{67} + (4 \beta_{2} + 4 \beta_1 + 4) q^{71} + (6 \beta_{2} - 3 \beta_1 - 3) q^{73} + (2 \beta_{3} + 4) q^{77} + (\beta_{2} + 4 \beta_1 + 4) q^{79} + (4 \beta_{3} + 4) q^{83} + ( - 2 \beta_{3} - 2 \beta_{2} - 2 \beta_1) q^{85} + (6 \beta_{3} + 6 \beta_{2} - 4 \beta_1) q^{89} + (\beta_{3} + \beta_{2} - 2 \beta_1) q^{91} + (2 \beta_{3} + \beta_{2} - 2 \beta_1 - 2) q^{95} + (6 \beta_1 + 6) q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 2 q^{5} - 8 q^{7}+O(q^{10}) \) Copy content Toggle raw display \( 4 q - 2 q^{5} - 8 q^{7} - 8 q^{11} - 2 q^{13} + 4 q^{17} + 8 q^{19} - 12 q^{23} - 2 q^{25} + 8 q^{29} - 16 q^{31} + 4 q^{35} + 12 q^{37} + 4 q^{41} - 16 q^{43} + 4 q^{47} + 8 q^{49} - 4 q^{53} + 4 q^{55} + 8 q^{59} - 2 q^{61} + 4 q^{65} - 8 q^{67} + 8 q^{71} - 6 q^{73} + 16 q^{77} + 8 q^{79} + 16 q^{83} + 4 q^{85} + 8 q^{89} + 4 q^{91} - 4 q^{95} + 12 q^{97}+O(q^{100}) \) Copy content Toggle raw display

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

\(\beta_{1}\)\(=\) \( ( -\nu^{3} + 2\nu^{2} - 2\nu - 1 ) / 2 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{3} - 2\nu^{2} + 6\nu - 1 ) / 2 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{3} + 2 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{2} + \beta _1 + 1 ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{3} + \beta_{2} + 3\beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{3} - 2 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/3420\mathbb{Z}\right)^\times\).

\(n\) \(1711\) \(1901\) \(2737\) \(3061\)
\(\chi(n)\) \(1\) \(1\) \(1\) \(\beta_{1}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1261.1
−0.309017 0.535233i
0.809017 + 1.40126i
−0.309017 + 0.535233i
0.809017 1.40126i
0 0 0 −0.500000 0.866025i 0 −4.23607 0 0 0
1261.2 0 0 0 −0.500000 0.866025i 0 0.236068 0 0 0
3241.1 0 0 0 −0.500000 + 0.866025i 0 −4.23607 0 0 0
3241.2 0 0 0 −0.500000 + 0.866025i 0 0.236068 0 0 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
19.c even 3 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 3420.2.t.r 4
3.b odd 2 1 3420.2.t.t yes 4
19.c even 3 1 inner 3420.2.t.r 4
57.h odd 6 1 3420.2.t.t yes 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
3420.2.t.r 4 1.a even 1 1 trivial
3420.2.t.r 4 19.c even 3 1 inner
3420.2.t.t yes 4 3.b odd 2 1
3420.2.t.t yes 4 57.h odd 6 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(3420, [\chi])\):

\( T_{7}^{2} + 4T_{7} - 1 \) Copy content Toggle raw display
\( T_{11} + 2 \) Copy content Toggle raw display
\( T_{13}^{2} + T_{13} + 1 \) Copy content Toggle raw display
\( T_{17}^{4} - 4T_{17}^{3} + 32T_{17}^{2} + 64T_{17} + 256 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( T^{4} \) Copy content Toggle raw display
$5$ \( (T^{2} + T + 1)^{2} \) Copy content Toggle raw display
$7$ \( (T^{2} + 4 T - 1)^{2} \) Copy content Toggle raw display
$11$ \( (T + 2)^{4} \) Copy content Toggle raw display
$13$ \( (T^{2} + T + 1)^{2} \) Copy content Toggle raw display
$17$ \( T^{4} - 4 T^{3} + \cdots + 256 \) Copy content Toggle raw display
$19$ \( (T^{2} - 4 T + 19)^{2} \) Copy content Toggle raw display
$23$ \( (T^{2} + 6 T + 36)^{2} \) Copy content Toggle raw display
$29$ \( (T^{2} - 4 T + 16)^{2} \) Copy content Toggle raw display
$31$ \( (T^{2} + 8 T + 11)^{2} \) Copy content Toggle raw display
$37$ \( (T - 3)^{4} \) Copy content Toggle raw display
$41$ \( T^{4} - 4 T^{3} + \cdots + 256 \) Copy content Toggle raw display
$43$ \( T^{4} + 16 T^{3} + \cdots + 3481 \) Copy content Toggle raw display
$47$ \( T^{4} - 4 T^{3} + \cdots + 256 \) Copy content Toggle raw display
$53$ \( T^{4} + 4 T^{3} + \cdots + 5776 \) Copy content Toggle raw display
$59$ \( T^{4} - 8 T^{3} + \cdots + 16 \) Copy content Toggle raw display
$61$ \( T^{4} + 2 T^{3} + \cdots + 361 \) Copy content Toggle raw display
$67$ \( T^{4} + 8 T^{3} + \cdots + 121 \) Copy content Toggle raw display
$71$ \( T^{4} - 8 T^{3} + \cdots + 4096 \) Copy content Toggle raw display
$73$ \( T^{4} + 6 T^{3} + \cdots + 29241 \) Copy content Toggle raw display
$79$ \( T^{4} - 8 T^{3} + \cdots + 121 \) Copy content Toggle raw display
$83$ \( (T^{2} - 8 T - 64)^{2} \) Copy content Toggle raw display
$89$ \( T^{4} - 8 T^{3} + \cdots + 26896 \) Copy content Toggle raw display
$97$ \( (T^{2} - 6 T + 36)^{2} \) Copy content Toggle raw display
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