Properties

Label 392.3.j.c
Level $392$
Weight $3$
Character orbit 392.j
Analytic conductor $10.681$
Analytic rank $0$
Dimension $4$
CM discriminant -56
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [392,3,Mod(117,392)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(392, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([0, 3, 5]))
 
N = Newforms(chi, 3, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("392.117");
 
S:= CuspForms(chi, 3);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 392 = 2^{3} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 3 \)
Character orbit: \([\chi]\) \(=\) 392.j (of order \(6\), 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: \(10.6812263629\)
Analytic rank: \(0\)
Dimension: \(4\)
Relative dimension: \(2\) over \(\Q(\zeta_{6})\)
Coefficient field: \(\Q(\sqrt{-3}, \sqrt{7})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} + 7x^{2} + 49 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{9}]\)
Coefficient ring index: \( 2^{2} \)
Twist minimal: no (minimal twist has level 56)
Sato-Tate group: $\mathrm{U}(1)[D_{6}]$

$q$-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.

\(f(q)\) \(=\) \( q - 2 \beta_{2} q^{2} + \beta_1 q^{3} + ( - 4 \beta_{2} - 4) q^{4} + (\beta_{3} + \beta_1) q^{5} - 2 \beta_{3} q^{6} - 8 q^{8} + 19 \beta_{2} q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - 2 \beta_{2} q^{2} + \beta_1 q^{3} + ( - 4 \beta_{2} - 4) q^{4} + (\beta_{3} + \beta_1) q^{5} - 2 \beta_{3} q^{6} - 8 q^{8} + 19 \beta_{2} q^{9} + 2 \beta_1 q^{10} + ( - 4 \beta_{3} - 4 \beta_1) q^{12} - \beta_{3} q^{13} - 28 q^{15} + 16 \beta_{2} q^{16} + (38 \beta_{2} + 38) q^{18} + (7 \beta_{3} + 7 \beta_1) q^{19} - 4 \beta_{3} q^{20} - 10 \beta_{2} q^{23} - 8 \beta_1 q^{24} + ( - 3 \beta_{2} - 3) q^{25} + ( - 2 \beta_{3} - 2 \beta_1) q^{26} + 10 \beta_{3} q^{27} + 56 \beta_{2} q^{30} + (32 \beta_{2} + 32) q^{32} + 76 q^{36} + 14 \beta_1 q^{38} + (28 \beta_{2} + 28) q^{39} + ( - 8 \beta_{3} - 8 \beta_1) q^{40} - 19 \beta_1 q^{45} + ( - 20 \beta_{2} - 20) q^{46} + 16 \beta_{3} q^{48} - 6 q^{50} - 4 \beta_1 q^{52} + (20 \beta_{3} + 20 \beta_1) q^{54} - 196 q^{57} + 17 \beta_1 q^{59} + (112 \beta_{2} + 112) q^{60} + ( - 23 \beta_{3} - 23 \beta_1) q^{61} + 64 q^{64} + 28 \beta_{2} q^{65} - 10 \beta_{3} q^{69} + 110 q^{71} - 152 \beta_{2} q^{72} + ( - 3 \beta_{3} - 3 \beta_1) q^{75} - 28 \beta_{3} q^{76} + 56 q^{78} - 130 \beta_{2} q^{79} - 16 \beta_1 q^{80} + ( - 109 \beta_{2} - 109) q^{81} - 31 \beta_{3} q^{83} + 38 \beta_{3} q^{90} - 40 q^{92} + ( - 196 \beta_{2} - 196) q^{95} + (32 \beta_{3} + 32 \beta_1) q^{96}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 4 q^{2} - 8 q^{4} - 32 q^{8} - 38 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 4 q + 4 q^{2} - 8 q^{4} - 32 q^{8} - 38 q^{9} - 112 q^{15} - 32 q^{16} + 76 q^{18} + 20 q^{23} - 6 q^{25} - 112 q^{30} + 64 q^{32} + 304 q^{36} + 56 q^{39} - 40 q^{46} - 24 q^{50} - 784 q^{57} + 224 q^{60} + 256 q^{64} - 56 q^{65} + 440 q^{71} + 304 q^{72} + 224 q^{78} + 260 q^{79} - 218 q^{81} - 160 q^{92} - 392 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} + 7x^{2} + 49 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( 2\nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{2} ) / 7 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 2\nu^{3} ) / 7 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( 7\beta_{2} \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 7\beta_{3} ) / 2 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/392\mathbb{Z}\right)^\times\).

\(n\) \(197\) \(295\) \(297\)
\(\chi(n)\) \(-1\) \(1\) \(-\beta_{2}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
117.1
−1.32288 2.29129i
1.32288 + 2.29129i
−1.32288 + 2.29129i
1.32288 2.29129i
1.00000 1.73205i −2.64575 4.58258i −2.00000 3.46410i 2.64575 4.58258i −10.5830 0 −8.00000 −9.50000 + 16.4545i −5.29150 9.16515i
117.2 1.00000 1.73205i 2.64575 + 4.58258i −2.00000 3.46410i −2.64575 + 4.58258i 10.5830 0 −8.00000 −9.50000 + 16.4545i 5.29150 + 9.16515i
325.1 1.00000 + 1.73205i −2.64575 + 4.58258i −2.00000 + 3.46410i 2.64575 + 4.58258i −10.5830 0 −8.00000 −9.50000 16.4545i −5.29150 + 9.16515i
325.2 1.00000 + 1.73205i 2.64575 4.58258i −2.00000 + 3.46410i −2.64575 4.58258i 10.5830 0 −8.00000 −9.50000 16.4545i 5.29150 9.16515i
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
56.h odd 2 1 CM by \(\Q(\sqrt{-14}) \)
7.b odd 2 1 inner
7.c even 3 1 inner
7.d odd 6 1 inner
8.b even 2 1 inner
56.j odd 6 1 inner
56.p even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 392.3.j.c 4
7.b odd 2 1 inner 392.3.j.c 4
7.c even 3 1 56.3.h.a 2
7.c even 3 1 inner 392.3.j.c 4
7.d odd 6 1 56.3.h.a 2
7.d odd 6 1 inner 392.3.j.c 4
8.b even 2 1 inner 392.3.j.c 4
21.g even 6 1 504.3.l.c 2
21.h odd 6 1 504.3.l.c 2
28.f even 6 1 224.3.h.b 2
28.g odd 6 1 224.3.h.b 2
56.h odd 2 1 CM 392.3.j.c 4
56.j odd 6 1 56.3.h.a 2
56.j odd 6 1 inner 392.3.j.c 4
56.k odd 6 1 224.3.h.b 2
56.m even 6 1 224.3.h.b 2
56.p even 6 1 56.3.h.a 2
56.p even 6 1 inner 392.3.j.c 4
84.j odd 6 1 2016.3.l.a 2
84.n even 6 1 2016.3.l.a 2
168.s odd 6 1 504.3.l.c 2
168.v even 6 1 2016.3.l.a 2
168.ba even 6 1 504.3.l.c 2
168.be odd 6 1 2016.3.l.a 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
56.3.h.a 2 7.c even 3 1
56.3.h.a 2 7.d odd 6 1
56.3.h.a 2 56.j odd 6 1
56.3.h.a 2 56.p even 6 1
224.3.h.b 2 28.f even 6 1
224.3.h.b 2 28.g odd 6 1
224.3.h.b 2 56.k odd 6 1
224.3.h.b 2 56.m even 6 1
392.3.j.c 4 1.a even 1 1 trivial
392.3.j.c 4 7.b odd 2 1 inner
392.3.j.c 4 7.c even 3 1 inner
392.3.j.c 4 7.d odd 6 1 inner
392.3.j.c 4 8.b even 2 1 inner
392.3.j.c 4 56.h odd 2 1 CM
392.3.j.c 4 56.j odd 6 1 inner
392.3.j.c 4 56.p even 6 1 inner
504.3.l.c 2 21.g even 6 1
504.3.l.c 2 21.h odd 6 1
504.3.l.c 2 168.s odd 6 1
504.3.l.c 2 168.ba even 6 1
2016.3.l.a 2 84.j odd 6 1
2016.3.l.a 2 84.n even 6 1
2016.3.l.a 2 168.v even 6 1
2016.3.l.a 2 168.be odd 6 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{4} + 28T_{3}^{2} + 784 \) acting on \(S_{3}^{\mathrm{new}}(392, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{2} - 2 T + 4)^{2} \) Copy content Toggle raw display
$3$ \( T^{4} + 28T^{2} + 784 \) Copy content Toggle raw display
$5$ \( T^{4} + 28T^{2} + 784 \) Copy content Toggle raw display
$7$ \( T^{4} \) Copy content Toggle raw display
$11$ \( T^{4} \) Copy content Toggle raw display
$13$ \( (T^{2} - 28)^{2} \) Copy content Toggle raw display
$17$ \( T^{4} \) Copy content Toggle raw display
$19$ \( T^{4} + 1372 T^{2} + 1882384 \) Copy content Toggle raw display
$23$ \( (T^{2} - 10 T + 100)^{2} \) Copy content Toggle raw display
$29$ \( T^{4} \) Copy content Toggle raw display
$31$ \( T^{4} \) Copy content Toggle raw display
$37$ \( T^{4} \) Copy content Toggle raw display
$41$ \( T^{4} \) Copy content Toggle raw display
$43$ \( T^{4} \) Copy content Toggle raw display
$47$ \( T^{4} \) Copy content Toggle raw display
$53$ \( T^{4} \) Copy content Toggle raw display
$59$ \( T^{4} + 8092 T^{2} + 65480464 \) Copy content Toggle raw display
$61$ \( T^{4} + 14812 T^{2} + 219395344 \) Copy content Toggle raw display
$67$ \( T^{4} \) Copy content Toggle raw display
$71$ \( (T - 110)^{4} \) Copy content Toggle raw display
$73$ \( T^{4} \) Copy content Toggle raw display
$79$ \( (T^{2} - 130 T + 16900)^{2} \) Copy content Toggle raw display
$83$ \( (T^{2} - 26908)^{2} \) Copy content Toggle raw display
$89$ \( T^{4} \) Copy content Toggle raw display
$97$ \( T^{4} \) Copy content Toggle raw display
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