Properties

Label 343.2.c.a
Level $343$
Weight $2$
Character orbit 343.c
Analytic conductor $2.739$
Analytic rank $0$
Dimension $6$
CM discriminant -7
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [343,2,Mod(18,343)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(343, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([4]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("343.18");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 343 = 7^{3} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 343.c (of order \(3\), degree \(2\), not 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: \(2.73886878933\)
Analytic rank: \(0\)
Dimension: \(6\)
Relative dimension: \(3\) over \(\Q(\zeta_{3})\)
Coefficient field: 6.0.64827.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{6} - x^{5} + 3x^{4} + 5x^{2} - 2x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{4}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{3}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{5}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (2 \beta_{5} + \beta_{4} + 2 \beta_1 - 2) q^{2} + ( - 4 \beta_{5} + \beta_{2} - \beta_1) q^{4} + ( - 3 \beta_{2} + 5) q^{8} + ( - 3 \beta_{5} + 3) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + (2 \beta_{5} + \beta_{4} + 2 \beta_1 - 2) q^{2} + ( - 4 \beta_{5} + \beta_{2} - \beta_1) q^{4} + ( - 3 \beta_{2} + 5) q^{8} + ( - 3 \beta_{5} + 3) q^{9} + ( - 2 \beta_{5} - 3 \beta_{4} + \cdots + 2 \beta_1) q^{11}+ \cdots + ( - 9 \beta_{3} - 6 \beta_{2} - 6) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 6 q - 3 q^{2} - 11 q^{4} + 24 q^{8} + 9 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 6 q - 3 q^{2} - 11 q^{4} + 24 q^{8} + 9 q^{9} - 5 q^{11} - 11 q^{16} + 9 q^{18} - 18 q^{22} - 3 q^{23} + 15 q^{25} + 26 q^{29} - 22 q^{32} - 66 q^{36} - 17 q^{37} + 26 q^{43} - 2 q^{44} + 32 q^{46} - 30 q^{50} - 19 q^{53} + 8 q^{58} + 23 q^{67} - 2 q^{71} + 36 q^{72} + 11 q^{74} + 25 q^{79} - 27 q^{81} + 8 q^{86} + 29 q^{88} + 8 q^{92} - 30 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{6} - x^{5} + 3x^{4} + 5x^{2} - 2x + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -\nu^{5} + 3\nu^{4} - 9\nu^{3} + 5\nu^{2} - 2\nu + 6 ) / 13 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -3\nu^{5} + 9\nu^{4} - 14\nu^{3} + 15\nu^{2} - 6\nu + 18 ) / 13 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -4\nu^{5} - \nu^{4} - 10\nu^{3} - 6\nu^{2} - 34\nu - 2 ) / 13 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -6\nu^{5} + 5\nu^{4} - 15\nu^{3} - 9\nu^{2} - 25\nu + 10 ) / 13 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( -\beta_{5} + \beta_{4} + \beta_{3} - \beta_{2} + \beta_1 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{3} - 3\beta_{2} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( 2\beta_{5} - 3\beta_{4} - 4\beta _1 - 2 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( \beta_{5} - 4\beta_{4} - 4\beta_{3} + 9\beta_{2} - 9\beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/343\mathbb{Z}\right)^\times\).

\(n\) \(3\)
\(\chi(n)\) \(-1 + \beta_{5}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
18.1
−0.623490 1.07992i
0.222521 + 0.385418i
0.900969 + 1.56052i
−0.623490 + 1.07992i
0.222521 0.385418i
0.900969 1.56052i
−1.34601 2.33136i 0 −2.62349 + 4.54402i 0 0 0 8.74094 1.50000 + 2.59808i 0
18.2 −1.17845 2.04113i 0 −1.77748 + 3.07868i 0 0 0 3.66487 1.50000 + 2.59808i 0
18.3 1.02446 + 1.77441i 0 −1.09903 + 1.90358i 0 0 0 −0.405813 1.50000 + 2.59808i 0
324.1 −1.34601 + 2.33136i 0 −2.62349 4.54402i 0 0 0 8.74094 1.50000 2.59808i 0
324.2 −1.17845 + 2.04113i 0 −1.77748 3.07868i 0 0 0 3.66487 1.50000 2.59808i 0
324.3 1.02446 1.77441i 0 −1.09903 1.90358i 0 0 0 −0.405813 1.50000 2.59808i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 18.3
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
7.b odd 2 1 CM by \(\Q(\sqrt{-7}) \)
7.c even 3 1 inner
7.d odd 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 343.2.c.a 6
7.b odd 2 1 CM 343.2.c.a 6
7.c even 3 1 343.2.a.b 3
7.c even 3 1 inner 343.2.c.a 6
7.d odd 6 1 343.2.a.b 3
7.d odd 6 1 inner 343.2.c.a 6
21.g even 6 1 3087.2.a.a 3
21.h odd 6 1 3087.2.a.a 3
28.f even 6 1 5488.2.a.c 3
28.g odd 6 1 5488.2.a.c 3
35.i odd 6 1 8575.2.a.a 3
35.j even 6 1 8575.2.a.a 3
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
343.2.a.b 3 7.c even 3 1
343.2.a.b 3 7.d odd 6 1
343.2.c.a 6 1.a even 1 1 trivial
343.2.c.a 6 7.b odd 2 1 CM
343.2.c.a 6 7.c even 3 1 inner
343.2.c.a 6 7.d odd 6 1 inner
3087.2.a.a 3 21.g even 6 1
3087.2.a.a 3 21.h odd 6 1
5488.2.a.c 3 28.f even 6 1
5488.2.a.c 3 28.g odd 6 1
8575.2.a.a 3 35.i odd 6 1
8575.2.a.a 3 35.j even 6 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(343, [\chi])\):

\( T_{2}^{6} + 3T_{2}^{5} + 13T_{2}^{4} + 14T_{2}^{3} + 55T_{2}^{2} + 52T_{2} + 169 \) Copy content Toggle raw display
\( T_{3} \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{6} + 3 T^{5} + \cdots + 169 \) Copy content Toggle raw display
$3$ \( T^{6} \) Copy content Toggle raw display
$5$ \( T^{6} \) Copy content Toggle raw display
$7$ \( T^{6} \) Copy content Toggle raw display
$11$ \( T^{6} + 5 T^{5} + \cdots + 27889 \) Copy content Toggle raw display
$13$ \( T^{6} \) Copy content Toggle raw display
$17$ \( T^{6} \) Copy content Toggle raw display
$19$ \( T^{6} \) Copy content Toggle raw display
$23$ \( T^{6} + 3 T^{5} + \cdots + 85849 \) Copy content Toggle raw display
$29$ \( (T^{3} - 13 T^{2} + \cdots + 601)^{2} \) Copy content Toggle raw display
$31$ \( T^{6} \) Copy content Toggle raw display
$37$ \( T^{6} + 17 T^{5} + \cdots + 1849 \) Copy content Toggle raw display
$41$ \( T^{6} \) Copy content Toggle raw display
$43$ \( (T^{3} - 13 T^{2} + \cdots + 223)^{2} \) Copy content Toggle raw display
$47$ \( T^{6} \) Copy content Toggle raw display
$53$ \( T^{6} + 19 T^{5} + \cdots + 12769 \) Copy content Toggle raw display
$59$ \( T^{6} \) Copy content Toggle raw display
$61$ \( T^{6} \) Copy content Toggle raw display
$67$ \( T^{6} - 23 T^{5} + \cdots + 284089 \) Copy content Toggle raw display
$71$ \( (T^{3} + T^{2} - 240 T + 377)^{2} \) Copy content Toggle raw display
$73$ \( T^{6} \) Copy content Toggle raw display
$79$ \( T^{6} - 25 T^{5} + \cdots + 1681 \) Copy content Toggle raw display
$83$ \( T^{6} \) Copy content Toggle raw display
$89$ \( T^{6} \) Copy content Toggle raw display
$97$ \( T^{6} \) Copy content Toggle raw display
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