Properties

Label 456.2.bu.b
Level $456$
Weight $2$
Character orbit 456.bu
Analytic conductor $3.641$
Analytic rank $0$
Dimension $12$
CM discriminant -8
Inner twists $4$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [456,2,Mod(35,456)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(456, base_ring=CyclotomicField(18))
 
chi = DirichletCharacter(H, H._module([9, 9, 9, 4]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("456.35");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 456 = 2^{3} \cdot 3 \cdot 19 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 456.bu (of order \(18\), degree \(6\), 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: \(3.64117833217\)
Analytic rank: \(0\)
Dimension: \(12\)
Relative dimension: \(2\) over \(\Q(\zeta_{18})\)
Coefficient field: 12.0.101559956668416.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{12} - 8x^{6} + 64 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{11}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{18}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{11}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_{11} q^{2} + (\beta_{9} + \beta_{6} - \beta_{3}) q^{3} - 2 \beta_{4} q^{4} + ( - \beta_{11} + 2 \beta_{8} + \beta_{5}) q^{6} + (2 \beta_{9} - 2 \beta_{3}) q^{8} + ( - \beta_{6} - 2 \beta_{3} + 1) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_{11} q^{2} + (\beta_{9} + \beta_{6} - \beta_{3}) q^{3} - 2 \beta_{4} q^{4} + ( - \beta_{11} + 2 \beta_{8} + \beta_{5}) q^{6} + (2 \beta_{9} - 2 \beta_{3}) q^{8} + ( - \beta_{6} - 2 \beta_{3} + 1) q^{9} + ( - 3 \beta_{10} - 3 \beta_{8} + \cdots + 3 \beta_{2}) q^{11}+ \cdots + (5 \beta_{11} + \beta_{10} + \cdots - 7 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 12 q + 6 q^{3} + 6 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 12 q + 6 q^{3} + 6 q^{9} - 24 q^{22} + 24 q^{24} + 60 q^{27} - 36 q^{38} - 18 q^{41} - 72 q^{44} - 42 q^{49} - 18 q^{59} + 48 q^{64} + 24 q^{66} - 42 q^{67} - 108 q^{68} + 96 q^{72} + 12 q^{73} + 42 q^{81} + 48 q^{82} + 30 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{12} - 8x^{6} + 64 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{2} ) / 2 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{3} ) / 2 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( \nu^{4} ) / 4 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( \nu^{5} ) / 4 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( \nu^{6} ) / 8 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{7} ) / 8 \) Copy content Toggle raw display
\(\beta_{8}\)\(=\) \( ( \nu^{8} ) / 16 \) Copy content Toggle raw display
\(\beta_{9}\)\(=\) \( ( \nu^{9} ) / 16 \) Copy content Toggle raw display
\(\beta_{10}\)\(=\) \( ( \nu^{10} ) / 32 \) Copy content Toggle raw display
\(\beta_{11}\)\(=\) \( ( \nu^{11} ) / 32 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( 2\beta_{2} \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( 2\beta_{3} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( 4\beta_{4} \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( 4\beta_{5} \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 8\beta_{6} \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( 8\beta_{7} \) Copy content Toggle raw display
\(\nu^{8}\)\(=\) \( 16\beta_{8} \) Copy content Toggle raw display
\(\nu^{9}\)\(=\) \( 16\beta_{9} \) Copy content Toggle raw display
\(\nu^{10}\)\(=\) \( 32\beta_{10} \) Copy content Toggle raw display
\(\nu^{11}\)\(=\) \( 32\beta_{11} \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/456\mathbb{Z}\right)^\times\).

\(n\) \(97\) \(229\) \(305\) \(343\)
\(\chi(n)\) \(\beta_{4}\) \(-1\) \(-1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
35.1
0.483690 1.32893i
−0.483690 + 1.32893i
−0.909039 1.08335i
0.909039 + 1.08335i
−1.39273 0.245576i
1.39273 + 0.245576i
−0.909039 + 1.08335i
0.909039 1.08335i
−1.39273 + 0.245576i
1.39273 0.245576i
0.483690 + 1.32893i
−0.483690 1.32893i
−0.909039 + 1.08335i 1.72474 0.158919i −0.347296 1.96962i 0 −1.39570 + 2.01297i 0 2.44949 + 1.41421i 2.94949 0.548188i 0
35.2 0.909039 1.08335i −0.724745 1.57313i −0.347296 1.96962i 0 −2.36307 0.644886i 0 −2.44949 1.41421i −1.94949 + 2.28024i 0
131.1 −1.39273 0.245576i −0.724745 1.57313i 1.87939 + 0.684040i 0 0.623050 + 2.36893i 0 −2.44949 1.41421i −1.94949 + 2.28024i 0
131.2 1.39273 + 0.245576i 1.72474 0.158919i 1.87939 + 0.684040i 0 2.44113 + 0.202225i 0 2.44949 + 1.41421i 2.94949 0.548188i 0
251.1 −0.483690 + 1.32893i 1.72474 + 0.158919i −1.53209 1.28558i 0 −1.04543 + 2.21519i 0 2.44949 1.41421i 2.94949 + 0.548188i 0
251.2 0.483690 1.32893i −0.724745 + 1.57313i −1.53209 1.28558i 0 1.74002 + 1.72404i 0 −2.44949 + 1.41421i −1.94949 2.28024i 0
275.1 −1.39273 + 0.245576i −0.724745 + 1.57313i 1.87939 0.684040i 0 0.623050 2.36893i 0 −2.44949 + 1.41421i −1.94949 2.28024i 0
275.2 1.39273 0.245576i 1.72474 + 0.158919i 1.87939 0.684040i 0 2.44113 0.202225i 0 2.44949 1.41421i 2.94949 + 0.548188i 0
347.1 −0.483690 1.32893i 1.72474 0.158919i −1.53209 + 1.28558i 0 −1.04543 2.21519i 0 2.44949 + 1.41421i 2.94949 0.548188i 0
347.2 0.483690 + 1.32893i −0.724745 1.57313i −1.53209 + 1.28558i 0 1.74002 1.72404i 0 −2.44949 1.41421i −1.94949 + 2.28024i 0
443.1 −0.909039 1.08335i 1.72474 + 0.158919i −0.347296 + 1.96962i 0 −1.39570 2.01297i 0 2.44949 1.41421i 2.94949 + 0.548188i 0
443.2 0.909039 + 1.08335i −0.724745 + 1.57313i −0.347296 + 1.96962i 0 −2.36307 + 0.644886i 0 −2.44949 + 1.41421i −1.94949 2.28024i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 35.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
8.d odd 2 1 CM by \(\Q(\sqrt{-2}) \)
57.l odd 18 1 inner
456.bu even 18 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 456.2.bu.b yes 12
3.b odd 2 1 456.2.bu.a 12
8.d odd 2 1 CM 456.2.bu.b yes 12
19.e even 9 1 456.2.bu.a 12
24.f even 2 1 456.2.bu.a 12
57.l odd 18 1 inner 456.2.bu.b yes 12
152.u odd 18 1 456.2.bu.a 12
456.bu even 18 1 inner 456.2.bu.b yes 12
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
456.2.bu.a 12 3.b odd 2 1
456.2.bu.a 12 19.e even 9 1
456.2.bu.a 12 24.f even 2 1
456.2.bu.a 12 152.u odd 18 1
456.2.bu.b yes 12 1.a even 1 1 trivial
456.2.bu.b yes 12 8.d odd 2 1 CM
456.2.bu.b yes 12 57.l odd 18 1 inner
456.2.bu.b yes 12 456.bu even 18 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(456, [\chi])\):

\( T_{5} \) Copy content Toggle raw display
\( T_{11}^{12} - 66 T_{11}^{10} + 3267 T_{11}^{8} + 1782 T_{11}^{7} - 68888 T_{11}^{6} - 58806 T_{11}^{5} + \cdots + 1014049 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{12} - 8T^{6} + 64 \) Copy content Toggle raw display
$3$ \( (T^{4} - 2 T^{3} + T^{2} + \cdots + 9)^{3} \) Copy content Toggle raw display
$5$ \( T^{12} \) Copy content Toggle raw display
$7$ \( T^{12} \) Copy content Toggle raw display
$11$ \( T^{12} - 66 T^{10} + \cdots + 1014049 \) Copy content Toggle raw display
$13$ \( T^{12} \) Copy content Toggle raw display
$17$ \( T^{12} + 918 T^{9} + \cdots + 47045881 \) Copy content Toggle raw display
$19$ \( T^{12} - 106 T^{9} + \cdots + 47045881 \) Copy content Toggle raw display
$23$ \( T^{12} \) Copy content Toggle raw display
$29$ \( T^{12} \) Copy content Toggle raw display
$31$ \( T^{12} \) Copy content Toggle raw display
$37$ \( T^{12} \) Copy content Toggle raw display
$41$ \( T^{12} + \cdots + 41437894969 \) Copy content Toggle raw display
$43$ \( T^{12} + \cdots + 594823321 \) Copy content Toggle raw display
$47$ \( T^{12} \) Copy content Toggle raw display
$53$ \( T^{12} \) Copy content Toggle raw display
$59$ \( T^{12} + \cdots + 260443853569 \) Copy content Toggle raw display
$61$ \( T^{12} \) Copy content Toggle raw display
$67$ \( T^{12} + \cdots + 805307017321 \) Copy content Toggle raw display
$71$ \( T^{12} \) Copy content Toggle raw display
$73$ \( T^{12} + \cdots + 964620586801 \) Copy content Toggle raw display
$79$ \( T^{12} \) Copy content Toggle raw display
$83$ \( T^{12} + \cdots + 1564283008369 \) Copy content Toggle raw display
$89$ \( T^{12} + \cdots + 168425239515625 \) Copy content Toggle raw display
$97$ \( T^{12} + \cdots + 828247426561 \) Copy content Toggle raw display
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