Properties

Label 342.2.u.b
Level $342$
Weight $2$
Character orbit 342.u
Analytic conductor $2.731$
Analytic rank $0$
Dimension $6$
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] = [342,2,Mod(55,342)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(342, base_ring=CyclotomicField(18))
 
chi = DirichletCharacter(H, H._module([0, 10]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("342.55");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 342 = 2 \cdot 3^{2} \cdot 19 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 342.u (of order \(9\), 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: \(2.73088374913\)
Analytic rank: \(0\)
Dimension: \(6\)
Coefficient field: \(\Q(\zeta_{18})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{6} - x^{3} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 114)
Sato-Tate group: $\mathrm{SU}(2)[C_{9}]$

$q$-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 primitive root of unity \(\zeta_{18}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \zeta_{18} q^{2} + \zeta_{18}^{2} q^{4} + (\zeta_{18}^{5} - 2 \zeta_{18}^{4} + \cdots - 1) q^{5}+ \cdots + \zeta_{18}^{3} q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + \zeta_{18} q^{2} + \zeta_{18}^{2} q^{4} + (\zeta_{18}^{5} - 2 \zeta_{18}^{4} + \cdots - 1) q^{5}+ \cdots + ( - \zeta_{18}^{5} - 8 \zeta_{18}^{4} + \cdots + 1) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 6 q - 3 q^{5} - 3 q^{7} + 3 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( 6 q - 3 q^{5} - 3 q^{7} + 3 q^{8} - 6 q^{10} + 9 q^{13} + 12 q^{14} + 3 q^{17} + 12 q^{20} + 15 q^{22} - 27 q^{23} - 15 q^{25} + 6 q^{26} + 15 q^{28} + 3 q^{29} - 15 q^{31} + 6 q^{34} - 12 q^{35} - 6 q^{37} - 6 q^{40} + 15 q^{41} + 3 q^{43} - 15 q^{44} - 6 q^{46} - 15 q^{47} - 24 q^{49} + 3 q^{50} - 9 q^{52} - 6 q^{53} + 27 q^{55} - 6 q^{56} + 12 q^{58} + 27 q^{59} - 15 q^{61} + 3 q^{62} - 3 q^{64} - 12 q^{65} - 3 q^{67} - 6 q^{68} + 12 q^{70} - 3 q^{71} + 12 q^{73} - 24 q^{74} + 3 q^{76} + 42 q^{77} + 27 q^{79} - 3 q^{80} - 15 q^{82} - 3 q^{83} + 12 q^{85} + 24 q^{86} - 42 q^{89} - 42 q^{91} + 27 q^{92} - 18 q^{94} - 24 q^{95} + 18 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/342\mathbb{Z}\right)^\times\).

\(n\) \(191\) \(325\)
\(\chi(n)\) \(1\) \(\zeta_{18}^{2}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
55.1
−0.173648 + 0.984808i
−0.766044 0.642788i
−0.173648 0.984808i
−0.766044 + 0.642788i
0.939693 0.342020i
0.939693 + 0.342020i
−0.173648 + 0.984808i 0 −0.939693 0.342020i −2.20574 + 0.802823i 0 −1.78699 3.09516i 0.500000 0.866025i 0 −0.407604 2.31164i
73.1 −0.766044 0.642788i 0 0.173648 + 0.984808i 0.613341 3.47843i 0 −1.85844 3.21891i 0.500000 0.866025i 0 −2.70574 + 2.27038i
199.1 −0.173648 0.984808i 0 −0.939693 + 0.342020i −2.20574 0.802823i 0 −1.78699 + 3.09516i 0.500000 + 0.866025i 0 −0.407604 + 2.31164i
253.1 −0.766044 + 0.642788i 0 0.173648 0.984808i 0.613341 + 3.47843i 0 −1.85844 + 3.21891i 0.500000 + 0.866025i 0 −2.70574 2.27038i
271.1 0.939693 0.342020i 0 0.766044 0.642788i 0.0923963 + 0.0775297i 0 2.14543 + 3.71599i 0.500000 0.866025i 0 0.113341 + 0.0412527i
289.1 0.939693 + 0.342020i 0 0.766044 + 0.642788i 0.0923963 0.0775297i 0 2.14543 3.71599i 0.500000 + 0.866025i 0 0.113341 0.0412527i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 55.1
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
19.e even 9 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 342.2.u.b 6
3.b odd 2 1 114.2.i.c 6
12.b even 2 1 912.2.bo.d 6
19.e even 9 1 inner 342.2.u.b 6
19.e even 9 1 6498.2.a.bp 3
19.f odd 18 1 6498.2.a.bu 3
57.j even 18 1 2166.2.a.p 3
57.l odd 18 1 114.2.i.c 6
57.l odd 18 1 2166.2.a.r 3
228.v even 18 1 912.2.bo.d 6
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
114.2.i.c 6 3.b odd 2 1
114.2.i.c 6 57.l odd 18 1
342.2.u.b 6 1.a even 1 1 trivial
342.2.u.b 6 19.e even 9 1 inner
912.2.bo.d 6 12.b even 2 1
912.2.bo.d 6 228.v even 18 1
2166.2.a.p 3 57.j even 18 1
2166.2.a.r 3 57.l odd 18 1
6498.2.a.bp 3 19.e even 9 1
6498.2.a.bu 3 19.f odd 18 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{6} + 3T_{5}^{5} + 12T_{5}^{4} + 46T_{5}^{3} + 60T_{5}^{2} - 12T_{5} + 1 \) acting on \(S_{2}^{\mathrm{new}}(342, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{6} - T^{3} + 1 \) Copy content Toggle raw display
$3$ \( T^{6} \) Copy content Toggle raw display
$5$ \( T^{6} + 3 T^{5} + \cdots + 1 \) Copy content Toggle raw display
$7$ \( T^{6} + 3 T^{5} + \cdots + 3249 \) Copy content Toggle raw display
$11$ \( T^{6} + 21 T^{4} + \cdots + 1369 \) Copy content Toggle raw display
$13$ \( T^{6} - 9 T^{5} + \cdots + 1 \) Copy content Toggle raw display
$17$ \( T^{6} - 3 T^{5} + \cdots + 9 \) Copy content Toggle raw display
$19$ \( T^{6} + 107T^{3} + 6859 \) Copy content Toggle raw display
$23$ \( T^{6} + 27 T^{5} + \cdots + 157609 \) Copy content Toggle raw display
$29$ \( T^{6} - 3 T^{5} + \cdots + 1 \) Copy content Toggle raw display
$31$ \( T^{6} + 15 T^{5} + \cdots + 11881 \) Copy content Toggle raw display
$37$ \( (T^{3} + 3 T^{2} - 45 T + 17)^{2} \) Copy content Toggle raw display
$41$ \( T^{6} - 15 T^{5} + \cdots + 2809 \) Copy content Toggle raw display
$43$ \( T^{6} - 3 T^{5} + \cdots + 63001 \) Copy content Toggle raw display
$47$ \( T^{6} + 15 T^{5} + \cdots + 5041 \) Copy content Toggle raw display
$53$ \( T^{6} + 6 T^{5} + \cdots + 395641 \) Copy content Toggle raw display
$59$ \( T^{6} - 27 T^{5} + \cdots + 81 \) Copy content Toggle raw display
$61$ \( T^{6} + 15 T^{5} + \cdots + 289 \) Copy content Toggle raw display
$67$ \( T^{6} + 3 T^{5} + \cdots + 7017201 \) Copy content Toggle raw display
$71$ \( T^{6} + 3 T^{5} + \cdots + 26569 \) Copy content Toggle raw display
$73$ \( T^{6} - 12 T^{5} + \cdots + 3249 \) Copy content Toggle raw display
$79$ \( T^{6} - 27 T^{5} + \cdots + 32761 \) Copy content Toggle raw display
$83$ \( T^{6} + 3 T^{5} + \cdots + 2601 \) Copy content Toggle raw display
$89$ \( T^{6} + 42 T^{5} + \cdots + 239121 \) Copy content Toggle raw display
$97$ \( T^{6} - 18 T^{5} + \cdots + 218089 \) Copy content Toggle raw display
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