Properties

Label 2016.2.b.d
Level $2016$
Weight $2$
Character orbit 2016.b
Analytic conductor $16.098$
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] = [2016,2,Mod(1567,2016)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2016, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 0, 0, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2016.1567");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2016 = 2^{5} \cdot 3^{2} \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 2016.b (of order \(2\), degree \(1\), 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: \(16.0978410475\)
Analytic rank: \(0\)
Dimension: \(16\)
Coefficient field: 16.0.29960650073923649536.7
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{16} - 7x^{12} + 40x^{8} - 112x^{4} + 256 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{17}]\)
Coefficient ring index: \( 2^{30} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-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.

\(f(q)\) \(=\) \( q - \beta_{2} q^{5} - \beta_{8} q^{7}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_{2} q^{5} - \beta_{8} q^{7} + (\beta_{11} + \beta_{7}) q^{11} + \beta_{15} q^{13} + ( - \beta_{6} + \beta_{2}) q^{17} - \beta_{4} q^{19} + \beta_{11} q^{23} + (\beta_{12} - 2) q^{25} + \beta_{14} q^{29} + ( - \beta_{8} - \beta_{5} - \beta_{4}) q^{31} + (\beta_{11} + \beta_{3}) q^{35} + ( - \beta_{12} + 1) q^{37} + ( - \beta_{6} + \beta_{2}) q^{41} + (\beta_{8} - \beta_{5} - \beta_1) q^{43} + (\beta_{13} + \beta_{3}) q^{47} + (\beta_{12} - \beta_{10} - 2) q^{49} + (\beta_{14} - \beta_{9}) q^{53} + (2 \beta_{8} + 2 \beta_{5} + 3 \beta_{4}) q^{55} + (\beta_{13} - \beta_{3}) q^{59} + ( - \beta_{15} + 2 \beta_{10}) q^{61} + (2 \beta_{14} + \beta_{9}) q^{65} + ( - \beta_{8} + \beta_{5} + \beta_1) q^{67} + (3 \beta_{11} + 2 \beta_{7}) q^{71} - 2 \beta_{15} q^{73} + (\beta_{14} + \beta_{9} - \beta_{2}) q^{77} + (\beta_{8} - \beta_{5}) q^{79} + (\beta_{13} + \beta_{3}) q^{83} + ( - 3 \beta_{12} + 5) q^{85} + ( - \beta_{6} - \beta_{2}) q^{89} + (\beta_{8} + \beta_{5} + 3 \beta_{4} + \beta_1) q^{91} + (2 \beta_{11} + 4 \beta_{7}) q^{95} - 2 \beta_{10} q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 16 q+O(q^{10}) \) Copy content Toggle raw display \( 16 q - 32 q^{25} + 16 q^{37} - 32 q^{49} + 80 q^{85}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{16} - 7x^{12} + 40x^{8} - 112x^{4} + 256 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( -\nu^{10} + 3\nu^{6} - 12\nu^{2} ) / 4 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{12} - 11\nu^{8} + 84\nu^{4} - 192 ) / 64 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{14} - 3\nu^{10} - 4\nu^{6} + 96\nu^{2} ) / 32 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -\nu^{15} - 2\nu^{13} + 11\nu^{11} - 10\nu^{9} - 20\nu^{7} + 56\nu^{5} - 384\nu ) / 128 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( - 3 \nu^{15} + 4 \nu^{14} - 2 \nu^{13} + 9 \nu^{11} - 28 \nu^{10} + 22 \nu^{9} - 52 \nu^{7} + \cdots + 256 \nu ) / 256 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 3\nu^{12} - \nu^{8} + 28\nu^{4} + 64 ) / 32 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{15} - 6\nu^{13} - 3\nu^{11} + 34\nu^{9} - 4\nu^{7} - 152\nu^{5} - 32\nu^{3} + 256\nu ) / 128 \) Copy content Toggle raw display
\(\beta_{8}\)\(=\) \( ( - 3 \nu^{15} - 4 \nu^{14} - 2 \nu^{13} + 9 \nu^{11} + 28 \nu^{10} + 22 \nu^{9} - 52 \nu^{7} + \cdots + 256 \nu ) / 256 \) Copy content Toggle raw display
\(\beta_{9}\)\(=\) \( ( \nu^{15} + 6\nu^{13} - 3\nu^{11} - 34\nu^{9} - 4\nu^{7} + 152\nu^{5} - 32\nu^{3} - 256\nu ) / 64 \) Copy content Toggle raw display
\(\beta_{10}\)\(=\) \( ( \nu^{15} + \nu^{11} + 16\nu^{9} + 16\nu^{7} - 48\nu^{5} - 16\nu^{3} + 320\nu ) / 64 \) Copy content Toggle raw display
\(\beta_{11}\)\(=\) \( ( -3\nu^{15} + 6\nu^{13} + 33\nu^{11} - 2\nu^{9} - 124\nu^{7} + 56\nu^{5} + 448\nu^{3} - 128\nu ) / 256 \) Copy content Toggle raw display
\(\beta_{12}\)\(=\) \( ( -\nu^{12} + 7\nu^{8} - 24\nu^{4} + 56 ) / 8 \) Copy content Toggle raw display
\(\beta_{13}\)\(=\) \( ( -\nu^{14} + 5\nu^{10} - 18\nu^{6} + 40\nu^{2} ) / 8 \) Copy content Toggle raw display
\(\beta_{14}\)\(=\) \( ( -\nu^{15} + 15\nu^{11} - 16\nu^{9} - 64\nu^{7} + 48\nu^{5} + 208\nu^{3} - 64\nu ) / 64 \) Copy content Toggle raw display
\(\beta_{15}\)\(=\) \( ( \nu^{15} - \nu^{13} - 5\nu^{11} + 3\nu^{9} + 18\nu^{7} + 4\nu^{5} - 8\nu^{3} - 32\nu ) / 32 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{14} - 2\beta_{11} + \beta_{10} + \beta_{8} - \beta_{7} + \beta_{5} - \beta_{4} ) / 8 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{13} - 2\beta_{8} + 2\beta_{5} + 2\beta_{3} ) / 8 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 2\beta_{15} + \beta_{14} + 2\beta_{11} - \beta_{10} - 2\beta_{9} - \beta_{8} - 3\beta_{7} - \beta_{5} - 3\beta_{4} ) / 8 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( 2\beta_{12} + \beta_{6} + 10\beta_{2} + 14 ) / 8 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( 6 \beta_{15} + \beta_{14} - 2 \beta_{11} + 3 \beta_{10} + 2 \beta_{9} + 9 \beta_{8} - 5 \beta_{7} + \cdots + 3 \beta_{4} ) / 8 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( 3\beta_{13} - 14\beta_{8} + 14\beta_{5} - 2\beta_{3} - 4\beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( 2 \beta_{15} - \beta_{14} - 2 \beta_{11} + 5 \beta_{10} - 10 \beta_{9} - 7 \beta_{8} + \cdots + 3 \beta_{4} ) / 8 \) Copy content Toggle raw display
\(\nu^{8}\)\(=\) \( ( 14\beta_{12} + 15\beta_{6} + 22\beta_{2} - 62 ) / 8 \) Copy content Toggle raw display
\(\nu^{9}\)\(=\) \( ( 18 \beta_{15} - 17 \beta_{14} + 34 \beta_{11} + 5 \beta_{10} + 6 \beta_{9} + 23 \beta_{8} + \cdots + 13 \beta_{4} ) / 8 \) Copy content Toggle raw display
\(\nu^{10}\)\(=\) \( ( -3\beta_{13} - 18\beta_{8} + 18\beta_{5} - 30\beta_{3} - 44\beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{11}\)\(=\) \( ( - 18 \beta_{15} + \beta_{14} + 2 \beta_{11} + 43 \beta_{10} - 6 \beta_{9} - 25 \beta_{8} + \cdots + 61 \beta_{4} ) / 8 \) Copy content Toggle raw display
\(\nu^{12}\)\(=\) \( ( -14\beta_{12} + 81\beta_{6} - 86\beta_{2} - 322 ) / 8 \) Copy content Toggle raw display
\(\nu^{13}\)\(=\) \( ( - 50 \beta_{15} - 79 \beta_{14} + 158 \beta_{11} - 5 \beta_{10} + 26 \beta_{9} - 55 \beta_{8} + \cdots - 45 \beta_{4} ) / 8 \) Copy content Toggle raw display
\(\nu^{14}\)\(=\) \( ( -93\beta_{13} + 82\beta_{8} - 82\beta_{5} - 34\beta_{3} - 148\beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{15}\)\(=\) \( ( 18 \beta_{15} + 31 \beta_{14} + 62 \beta_{11} + 117 \beta_{10} + 134 \beta_{9} - 135 \beta_{8} + \cdots + 99 \beta_{4} ) / 8 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2016\mathbb{Z}\right)^\times\).

\(n\) \(127\) \(577\) \(1765\) \(1793\)
\(\chi(n)\) \(-1\) \(-1\) \(1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1567.1
0.481610 1.32968i
−1.32968 0.481610i
−0.481610 + 1.32968i
1.32968 + 0.481610i
0.281691 1.38588i
1.38588 + 0.281691i
−0.281691 + 1.38588i
−1.38588 0.281691i
1.38588 0.281691i
0.281691 + 1.38588i
−1.38588 + 0.281691i
−0.281691 1.38588i
−1.32968 + 0.481610i
0.481610 + 1.32968i
1.32968 0.481610i
−0.481610 1.32968i
0 0 0 3.33513i 0 −0.662153 2.56155i 0 0 0
1567.2 0 0 0 3.33513i 0 −0.662153 + 2.56155i 0 0 0
1567.3 0 0 0 3.33513i 0 0.662153 2.56155i 0 0 0
1567.4 0 0 0 3.33513i 0 0.662153 + 2.56155i 0 0 0
1567.5 0 0 0 1.69614i 0 −2.13578 1.56155i 0 0 0
1567.6 0 0 0 1.69614i 0 −2.13578 + 1.56155i 0 0 0
1567.7 0 0 0 1.69614i 0 2.13578 1.56155i 0 0 0
1567.8 0 0 0 1.69614i 0 2.13578 + 1.56155i 0 0 0
1567.9 0 0 0 1.69614i 0 −2.13578 1.56155i 0 0 0
1567.10 0 0 0 1.69614i 0 −2.13578 + 1.56155i 0 0 0
1567.11 0 0 0 1.69614i 0 2.13578 1.56155i 0 0 0
1567.12 0 0 0 1.69614i 0 2.13578 + 1.56155i 0 0 0
1567.13 0 0 0 3.33513i 0 −0.662153 2.56155i 0 0 0
1567.14 0 0 0 3.33513i 0 −0.662153 + 2.56155i 0 0 0
1567.15 0 0 0 3.33513i 0 0.662153 2.56155i 0 0 0
1567.16 0 0 0 3.33513i 0 0.662153 + 2.56155i 0 0 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 1567.16
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 inner
4.b odd 2 1 inner
7.b odd 2 1 inner
12.b even 2 1 inner
21.c even 2 1 inner
28.d even 2 1 inner
84.h odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2016.2.b.d 16
3.b odd 2 1 inner 2016.2.b.d 16
4.b odd 2 1 inner 2016.2.b.d 16
7.b odd 2 1 inner 2016.2.b.d 16
8.b even 2 1 4032.2.b.r 16
8.d odd 2 1 4032.2.b.r 16
12.b even 2 1 inner 2016.2.b.d 16
21.c even 2 1 inner 2016.2.b.d 16
24.f even 2 1 4032.2.b.r 16
24.h odd 2 1 4032.2.b.r 16
28.d even 2 1 inner 2016.2.b.d 16
56.e even 2 1 4032.2.b.r 16
56.h odd 2 1 4032.2.b.r 16
84.h odd 2 1 inner 2016.2.b.d 16
168.e odd 2 1 4032.2.b.r 16
168.i even 2 1 4032.2.b.r 16
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
2016.2.b.d 16 1.a even 1 1 trivial
2016.2.b.d 16 3.b odd 2 1 inner
2016.2.b.d 16 4.b odd 2 1 inner
2016.2.b.d 16 7.b odd 2 1 inner
2016.2.b.d 16 12.b even 2 1 inner
2016.2.b.d 16 21.c even 2 1 inner
2016.2.b.d 16 28.d even 2 1 inner
2016.2.b.d 16 84.h odd 2 1 inner
4032.2.b.r 16 8.b even 2 1
4032.2.b.r 16 8.d odd 2 1
4032.2.b.r 16 24.f even 2 1
4032.2.b.r 16 24.h odd 2 1
4032.2.b.r 16 56.e even 2 1
4032.2.b.r 16 56.h odd 2 1
4032.2.b.r 16 168.e odd 2 1
4032.2.b.r 16 168.i even 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(2016, [\chi])\):

\( T_{5}^{4} + 14T_{5}^{2} + 32 \) Copy content Toggle raw display
\( T_{19}^{4} - 28T_{19}^{2} + 128 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{16} \) Copy content Toggle raw display
$3$ \( T^{16} \) Copy content Toggle raw display
$5$ \( (T^{4} + 14 T^{2} + 32)^{4} \) Copy content Toggle raw display
$7$ \( (T^{8} + 8 T^{6} + \cdots + 2401)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} + 26 T^{2} + 16)^{4} \) Copy content Toggle raw display
$13$ \( (T^{4} + 40 T^{2} + 128)^{4} \) Copy content Toggle raw display
$17$ \( (T^{4} + 46 T^{2} + 512)^{4} \) Copy content Toggle raw display
$19$ \( (T^{4} - 28 T^{2} + 128)^{4} \) Copy content Toggle raw display
$23$ \( (T^{4} + 18 T^{2} + 64)^{4} \) Copy content Toggle raw display
$29$ \( (T^{4} - 72 T^{2} + 1024)^{4} \) Copy content Toggle raw display
$31$ \( (T^{4} - 40 T^{2} + 128)^{4} \) Copy content Toggle raw display
$37$ \( (T^{2} - 2 T - 16)^{8} \) Copy content Toggle raw display
$41$ \( (T^{4} + 46 T^{2} + 512)^{4} \) Copy content Toggle raw display
$43$ \( (T^{4} + 84 T^{2} + 64)^{4} \) Copy content Toggle raw display
$47$ \( (T^{4} - 160 T^{2} + 2048)^{4} \) Copy content Toggle raw display
$53$ \( (T^{4} - 104 T^{2} + 256)^{4} \) Copy content Toggle raw display
$59$ \( (T^{4} - 224 T^{2} + 8192)^{4} \) Copy content Toggle raw display
$61$ \( (T^{4} + 296 T^{2} + 21632)^{4} \) Copy content Toggle raw display
$67$ \( (T^{4} + 84 T^{2} + 64)^{4} \) Copy content Toggle raw display
$71$ \( (T^{4} + 178 T^{2} + 4096)^{4} \) Copy content Toggle raw display
$73$ \( (T^{4} + 160 T^{2} + 2048)^{4} \) Copy content Toggle raw display
$79$ \( (T^{4} + 36 T^{2} + 256)^{4} \) Copy content Toggle raw display
$83$ \( (T^{4} - 160 T^{2} + 2048)^{4} \) Copy content Toggle raw display
$89$ \( (T^{4} + 62 T^{2} + 128)^{4} \) Copy content Toggle raw display
$97$ \( (T^{4} + 224 T^{2} + 8192)^{4} \) Copy content Toggle raw display
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