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Properties

Label 882.2.k.b
Level $882$
Weight $2$
Character orbit 882.k
Analytic conductor $7.043$
Analytic rank $0$
Dimension $16$
CM no
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [882,2,Mod(215,882)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(882, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([3, 5]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("882.215");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 882 = 2 \cdot 3^{2} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 882.k (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: \(7.04280545828\)
Analytic rank: \(0\)
Dimension: \(16\)
Relative dimension: \(8\) over \(\Q(\zeta_{6})\)
Coefficient field: \(\Q(\zeta_{48})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{16} - x^{8} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 2^{6} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{6}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{15}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (\beta_{5} - \beta_1) q^{2} + ( - \beta_{3} + 1) q^{4} + (\beta_{11} - \beta_{8}) q^{5} + \beta_{5} q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + (\beta_{5} - \beta_1) q^{2} + ( - \beta_{3} + 1) q^{4} + (\beta_{11} - \beta_{8}) q^{5} + \beta_{5} q^{8} - \beta_{13} q^{10} - 4 \beta_1 q^{11} + ( - 4 \beta_{13} + 4 \beta_{10} - \beta_{7}) q^{13} - \beta_{3} q^{16} + ( - 3 \beta_{15} + 3 \beta_{4}) q^{17} + (4 \beta_{7} - 4 \beta_{2}) q^{19} + \beta_{11} q^{20} + 4 q^{22} - 4 \beta_{9} q^{23} + (\beta_{14} - \beta_{6} - 3 \beta_{3} + 3) q^{25} + (4 \beta_{11} - 4 \beta_{8} + \beta_{4}) q^{26} + ( - 4 \beta_{12} + 4 \beta_{9} + 4 \beta_{5}) q^{29} + ( - 4 \beta_{13} + 4 \beta_{2}) q^{31} + \beta_1 q^{32} - 3 \beta_{7} q^{34} + ( - 3 \beta_{6} - 4 \beta_{3}) q^{37} + (4 \beta_{15} - 4 \beta_{4}) q^{38} - \beta_{10} q^{40} - \beta_{15} q^{41} + ( - 4 \beta_{14} + 4) q^{43} + (4 \beta_{5} - 4 \beta_1) q^{44} + (4 \beta_{14} - 4 \beta_{6}) q^{46} + 4 \beta_{4} q^{47} + (\beta_{12} - \beta_{9} + 3 \beta_{5}) q^{50} + ( - 4 \beta_{13} - \beta_{2}) q^{52} + ( - 3 \beta_{12} - 4 \beta_1) q^{53} + ( - 4 \beta_{13} + 4 \beta_{10}) q^{55} + (4 \beta_{6} - 4 \beta_{3}) q^{58} + ( - 4 \beta_{15} + 4 \beta_{8} + 4 \beta_{4}) q^{59} + (\beta_{10} + 8 \beta_{7} - 8 \beta_{2}) q^{61} + ( - 4 \beta_{15} + 4 \beta_{11}) q^{62} - q^{64} + ( - 3 \beta_{9} - 8 \beta_{5} + 8 \beta_1) q^{65} + (4 \beta_{3} - 4) q^{67} + 3 \beta_{4} q^{68} + ( - 4 \beta_{12} + 4 \beta_{9} - 8 \beta_{5}) q^{71} + 5 \beta_{13} q^{73} + (3 \beta_{12} + 4 \beta_1) q^{74} + 4 \beta_{7} q^{76} - 4 \beta_{6} q^{79} + \beta_{8} q^{80} + ( - \beta_{7} + \beta_{2}) q^{82} + ( - 4 \beta_{15} - 8 \beta_{11}) q^{83} - 3 \beta_{14} q^{85} + (4 \beta_{9} + 4 \beta_{5} - 4 \beta_1) q^{86} + ( - 4 \beta_{3} + 4) q^{88} + ( - 5 \beta_{11} + 5 \beta_{8} - 8 \beta_{4}) q^{89} + (4 \beta_{12} - 4 \beta_{9}) q^{92} - 4 \beta_{2} q^{94} - 4 \beta_{12} q^{95} + (5 \beta_{13} - 5 \beta_{10}) q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 16 q + 8 q^{4}+O(q^{10}) \) Copy content Toggle raw display \( 16 q + 8 q^{4} - 8 q^{16} + 64 q^{22} + 24 q^{25} - 32 q^{37} + 64 q^{43} - 32 q^{58} - 16 q^{64} - 32 q^{67} + 32 q^{88}+O(q^{100}) \) Copy content Toggle raw display

Display 100 coefficients 10 coefficients

Basis of coefficient ring

\(\beta_{1}\)\(=\) \( \zeta_{48}^{4} \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \zeta_{48}^{7} + \zeta_{48} \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \zeta_{48}^{8} \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( \zeta_{48}^{11} + \zeta_{48}^{5} \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( \zeta_{48}^{12} \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( \zeta_{48}^{14} + \zeta_{48}^{2} \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( \zeta_{48}^{15} + \zeta_{48}^{9} \) Copy content Toggle raw display
\(\beta_{8}\)\(=\) \( -\zeta_{48}^{7} + \zeta_{48} \) Copy content Toggle raw display
\(\beta_{9}\)\(=\) \( -\zeta_{48}^{14} + \zeta_{48}^{2} \) Copy content Toggle raw display
\(\beta_{10}\)\(=\) \( -\zeta_{48}^{11} + \zeta_{48}^{5} \) Copy content Toggle raw display
\(\beta_{11}\)\(=\) \( -\zeta_{48}^{15} + \zeta_{48}^{9} \) Copy content Toggle raw display
\(\beta_{12}\)\(=\) \( -\zeta_{48}^{14} + \zeta_{48}^{10} + \zeta_{48}^{6} \) Copy content Toggle raw display
\(\beta_{13}\)\(=\) \( \zeta_{48}^{13} - \zeta_{48}^{11} + \zeta_{48}^{3} \) Copy content Toggle raw display
\(\beta_{14}\)\(=\) \( -\zeta_{48}^{10} + \zeta_{48}^{6} + \zeta_{48}^{2} \) Copy content Toggle raw display
\(\beta_{15}\)\(=\) \( -\zeta_{48}^{13} + \zeta_{48}^{5} + \zeta_{48}^{3} \) Copy content Toggle raw display

Display \(\zeta_{48}^j\) in terms of \(\beta_i\)

\(\zeta_{48}\)\(=\) \( ( \beta_{8} + \beta_{2} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{2}\)\(=\) \( ( \beta_{9} + \beta_{6} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{3}\)\(=\) \( ( \beta_{15} + \beta_{13} - \beta_{10} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{4}\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\zeta_{48}^{5}\)\(=\) \( ( \beta_{10} + \beta_{4} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{6}\)\(=\) \( ( \beta_{14} + \beta_{12} - \beta_{9} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{7}\)\(=\) \( ( -\beta_{8} + \beta_{2} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{8}\)\(=\) \( \beta_{3} \) Copy content Toggle raw display
\(\zeta_{48}^{9}\)\(=\) \( ( \beta_{11} + \beta_{7} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{10}\)\(=\) \( ( -\beta_{14} + \beta_{12} + \beta_{6} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{11}\)\(=\) \( ( -\beta_{10} + \beta_{4} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{12}\)\(=\) \( \beta_{5} \) Copy content Toggle raw display
\(\zeta_{48}^{13}\)\(=\) \( ( -\beta_{15} + \beta_{13} + \beta_{4} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{14}\)\(=\) \( ( -\beta_{9} + \beta_{6} ) / 2 \) Copy content Toggle raw display
\(\zeta_{48}^{15}\)\(=\) \( ( -\beta_{11} + \beta_{7} ) / 2 \) Copy content Toggle raw display

Display \(\beta_i\) in terms of \(\zeta_{48}^j\)

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/882\mathbb{Z}\right)^\times\).

\(n\) \(199\) \(785\)
\(\chi(n)\) \(\beta_{3}\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
215.1
−0.130526 − 0.991445i
−0.991445 + 0.130526i
0.991445 − 0.130526i
0.130526 + 0.991445i
−0.793353 − 0.608761i
0.608761 − 0.793353i
−0.608761 + 0.793353i
0.793353 + 0.608761i
−0.130526 + 0.991445i
−0.991445 − 0.130526i
0.991445 + 0.130526i
0.130526 − 0.991445i
−0.793353 + 0.608761i
0.608761 + 0.793353i
−0.608761 − 0.793353i
0.793353 − 0.608761i
−0.866025 − 0.500000i 0 0.500000 + 0.866025i −0.923880 + 1.60021i 0 0 − 1.00000i 0 1.60021 − 0.923880i
215.2 −0.866025 − 0.500000i 0 0.500000 + 0.866025i −0.382683 + 0.662827i 0 0 − 1.00000i 0 0.662827 − 0.382683i
215.3 −0.866025 − 0.500000i 0 0.500000 + 0.866025i 0.382683 − 0.662827i 0 0 − 1.00000i 0 −0.662827 + 0.382683i
215.4 −0.866025 − 0.500000i 0 0.500000 + 0.866025i 0.923880 − 1.60021i 0 0 − 1.00000i 0 −1.60021 + 0.923880i
215.5 0.866025 + 0.500000i 0 0.500000 + 0.866025i −0.923880 + 1.60021i 0 0 1.00000i 0 −1.60021 + 0.923880i
215.6 0.866025 + 0.500000i 0 0.500000 + 0.866025i −0.382683 + 0.662827i 0 0 1.00000i 0 −0.662827 + 0.382683i
215.7 0.866025 + 0.500000i 0 0.500000 + 0.866025i 0.382683 − 0.662827i 0 0 1.00000i 0 0.662827 − 0.382683i
215.8 0.866025 + 0.500000i 0 0.500000 + 0.866025i 0.923880 − 1.60021i 0 0 1.00000i 0 1.60021 − 0.923880i
521.1 −0.866025 + 0.500000i 0 0.500000 − 0.866025i −0.923880 − 1.60021i 0 0 1.00000i 0 1.60021 + 0.923880i
521.2 −0.866025 + 0.500000i 0 0.500000 − 0.866025i −0.382683 − 0.662827i 0 0 1.00000i 0 0.662827 + 0.382683i
521.3 −0.866025 + 0.500000i 0 0.500000 − 0.866025i 0.382683 + 0.662827i 0 0 1.00000i 0 −0.662827 − 0.382683i
521.4 −0.866025 + 0.500000i 0 0.500000 − 0.866025i 0.923880 + 1.60021i 0 0 1.00000i 0 −1.60021 − 0.923880i
521.5 0.866025 − 0.500000i 0 0.500000 − 0.866025i −0.923880 − 1.60021i 0 0 − 1.00000i 0 −1.60021 − 0.923880i
521.6 0.866025 − 0.500000i 0 0.500000 − 0.866025i −0.382683 − 0.662827i 0 0 − 1.00000i 0 −0.662827 − 0.382683i
521.7 0.866025 − 0.500000i 0 0.500000 − 0.866025i 0.382683 + 0.662827i 0 0 − 1.00000i 0 0.662827 + 0.382683i
521.8 0.866025 − 0.500000i 0 0.500000 − 0.866025i 0.923880 + 1.60021i 0 0 − 1.00000i 0 1.60021 + 0.923880i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 215.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 inner
7.b odd 2 1 inner
7.c even 3 1 inner
7.d odd 6 1 inner
21.c even 2 1 inner
21.g even 6 1 inner
21.h odd 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 882.2.k.b 16
3.b odd 2 1 inner 882.2.k.b 16
7.b odd 2 1 inner 882.2.k.b 16
7.c even 3 1 882.2.d.b ✓ 8
7.c even 3 1 inner 882.2.k.b 16
7.d odd 6 1 882.2.d.b ✓ 8
7.d odd 6 1 inner 882.2.k.b 16
21.c even 2 1 inner 882.2.k.b 16
21.g even 6 1 882.2.d.b ✓ 8
21.g even 6 1 inner 882.2.k.b 16
21.h odd 6 1 882.2.d.b ✓ 8
21.h odd 6 1 inner 882.2.k.b 16
28.f even 6 1 7056.2.k.d 8
28.g odd 6 1 7056.2.k.d 8
84.j odd 6 1 7056.2.k.d 8
84.n even 6 1 7056.2.k.d 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
882.2.d.b ✓ 8 7.c even 3 1
882.2.d.b ✓ 8 7.d odd 6 1
882.2.d.b ✓ 8 21.g even 6 1
882.2.d.b ✓ 8 21.h odd 6 1
882.2.k.b 16 1.a even 1 1 trivial
882.2.k.b 16 3.b odd 2 1 inner
882.2.k.b 16 7.b odd 2 1 inner
882.2.k.b 16 7.c even 3 1 inner
882.2.k.b 16 7.d odd 6 1 inner
882.2.k.b 16 21.c even 2 1 inner
882.2.k.b 16 21.g even 6 1 inner
882.2.k.b 16 21.h odd 6 1 inner
7056.2.k.d 8 28.f even 6 1
7056.2.k.d 8 28.g odd 6 1
7056.2.k.d 8 84.j odd 6 1
7056.2.k.d 8 84.n even 6 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{8} + 4T_{5}^{6} + 14T_{5}^{4} + 8T_{5}^{2} + 4 \) acting on \(S_{2}^{\mathrm{new}}(882, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} - T^{2} + 1)^{4} \) Copy content Toggle raw display
$3$ \( T^{16} \) Copy content Toggle raw display
$5$ \( (T^{8} + 4 T^{6} + 14 T^{4} + \cdots + 4)^{2} \) Copy content Toggle raw display
$7$ \( T^{16} \) Copy content Toggle raw display
$11$ \( (T^{4} - 16 T^{2} + 256)^{4} \) Copy content Toggle raw display
$13$ \( (T^{4} + 68 T^{2} + 1058)^{4} \) Copy content Toggle raw display
$17$ \( (T^{8} + 36 T^{6} + \cdots + 26244)^{2} \) Copy content Toggle raw display
$19$ \( (T^{8} - 64 T^{6} + \cdots + 262144)^{2} \) Copy content Toggle raw display
$23$ \( (T^{4} - 32 T^{2} + 1024)^{4} \) Copy content Toggle raw display
$29$ \( (T^{4} + 96 T^{2} + 256)^{4} \) Copy content Toggle raw display
$31$ \( (T^{8} - 128 T^{6} + \cdots + 4194304)^{2} \) Copy content Toggle raw display
$37$ \( (T^{4} + 8 T^{3} + 66 T^{2} + \cdots + 4)^{4} \) Copy content Toggle raw display
$41$ \( (T^{4} - 4 T^{2} + 2)^{4} \) Copy content Toggle raw display
$43$ \( (T^{2} - 8 T - 16)^{8} \) Copy content Toggle raw display
$47$ \( (T^{8} + 64 T^{6} + \cdots + 262144)^{2} \) Copy content Toggle raw display
$53$ \( (T^{8} - 68 T^{6} + \cdots + 16)^{2} \) Copy content Toggle raw display
$59$ \( (T^{8} + 128 T^{6} + \cdots + 4194304)^{2} \) Copy content Toggle raw display
$61$ \( (T^{8} - 260 T^{6} + \cdots + 155800324)^{2} \) Copy content Toggle raw display
$67$ \( (T^{2} + 4 T + 16)^{8} \) Copy content Toggle raw display
$71$ \( (T^{4} + 192 T^{2} + 1024)^{4} \) Copy content Toggle raw display
$73$ \( (T^{8} - 100 T^{6} + \cdots + 1562500)^{2} \) Copy content Toggle raw display
$79$ \( (T^{4} + 32 T^{2} + 1024)^{4} \) Copy content Toggle raw display
$83$ \( (T^{4} - 320 T^{2} + 25088)^{4} \) Copy content Toggle raw display
$89$ \( (T^{8} + 356 T^{6} + \cdots + 11303044)^{2} \) Copy content Toggle raw display
$97$ \( (T^{4} + 100 T^{2} + 1250)^{4} \) Copy content Toggle raw display
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