Properties

Label 1248.2.d.c
Level $1248$
Weight $2$
Character orbit 1248.d
Analytic conductor $9.965$
Analytic rank $0$
Dimension $16$
CM no
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1248,2,Mod(287,1248)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1248, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 0, 1, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1248.287");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1248 = 2^{5} \cdot 3 \cdot 13 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1248.d (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: \(9.96533017226\)
Analytic rank: \(0\)
Dimension: \(16\)
Coefficient field: \(\mathbb{Q}[x]/(x^{16} - \cdots)\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{16} - 4 x^{13} + 5 x^{12} - 4 x^{11} + 8 x^{10} - 16 x^{9} + 28 x^{8} - 32 x^{7} + 32 x^{6} + \cdots + 256 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{18} \)
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.

\(f(q)\) \(=\) \( q + \beta_{5} q^{3} - \beta_{4} q^{5} - \beta_{2} q^{7} + ( - \beta_{9} - \beta_{4} - 1) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{5} q^{3} - \beta_{4} q^{5} - \beta_{2} q^{7} + ( - \beta_{9} - \beta_{4} - 1) q^{9} + (\beta_{15} - \beta_{13} + \cdots + \beta_{8}) q^{11}+ \cdots + ( - \beta_{15} - 2 \beta_{11} + \cdots - \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 16 q - 12 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 16 q - 12 q^{9} - 16 q^{13} + 20 q^{21} + 8 q^{25} - 16 q^{33} + 8 q^{37} - 36 q^{45} + 40 q^{49} + 24 q^{57} + 48 q^{61} + 40 q^{69} - 48 q^{73} + 36 q^{81} + 40 q^{85} + 8 q^{93} - 80 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{16} - 4 x^{13} + 5 x^{12} - 4 x^{11} + 8 x^{10} - 16 x^{9} + 28 x^{8} - 32 x^{7} + 32 x^{6} + \cdots + 256 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( - 5 \nu^{15} + 30 \nu^{14} - 10 \nu^{13} + 12 \nu^{12} - 29 \nu^{11} + 58 \nu^{10} - 82 \nu^{9} + \cdots + 512 ) / 1088 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 11 \nu^{15} - 100 \nu^{14} + 192 \nu^{13} - 244 \nu^{12} + 567 \nu^{11} - 1168 \nu^{10} + 1656 \nu^{9} + \cdots - 8960 ) / 2176 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 5 \nu^{15} + 21 \nu^{14} - 58 \nu^{13} + 56 \nu^{12} - 73 \nu^{11} + 197 \nu^{10} - 394 \nu^{9} + \cdots + 2752 ) / 816 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 43 \nu^{15} - 156 \nu^{14} + 52 \nu^{13} - 212 \nu^{12} + 535 \nu^{11} - 968 \nu^{10} + 1324 \nu^{9} + \cdots - 1792 ) / 6528 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( - 29 \nu^{15} - 13 \nu^{14} + 44 \nu^{13} + 56 \nu^{12} - 73 \nu^{11} - 109 \nu^{10} + 320 \nu^{9} + \cdots - 9216 ) / 3264 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 6 \nu^{15} - 19 \nu^{14} + 46 \nu^{13} - 62 \nu^{12} + 96 \nu^{11} - 175 \nu^{10} + 350 \nu^{9} + \cdots - 1920 ) / 544 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 53 \nu^{15} - 12 \nu^{14} - 64 \nu^{13} - 100 \nu^{12} + 185 \nu^{11} - 64 \nu^{10} - 280 \nu^{9} + \cdots + 10240 ) / 3264 \) Copy content Toggle raw display
\(\beta_{8}\)\(=\) \( ( 56 \nu^{15} - 47 \nu^{14} + 10 \nu^{13} - 80 \nu^{12} + 352 \nu^{11} - 347 \nu^{10} + 286 \nu^{9} + \cdots + 3840 ) / 3264 \) Copy content Toggle raw display
\(\beta_{9}\)\(=\) \( ( 121 \nu^{15} - 12 \nu^{14} + 4 \nu^{13} - 644 \nu^{12} + 1069 \nu^{11} - 1424 \nu^{10} + 1420 \nu^{9} + \cdots + 5888 ) / 6528 \) Copy content Toggle raw display
\(\beta_{10}\)\(=\) \( ( - 169 \nu^{15} + 708 \nu^{14} - 916 \nu^{13} + 1412 \nu^{12} - 3469 \nu^{11} + 6632 \nu^{10} + \cdots + 29056 ) / 6528 \) Copy content Toggle raw display
\(\beta_{11}\)\(=\) \( ( 125 \nu^{15} - 104 \nu^{14} + 46 \nu^{13} - 572 \nu^{12} + 997 \nu^{11} - 668 \nu^{10} + 622 \nu^{9} + \cdots + 30720 ) / 3264 \) Copy content Toggle raw display
\(\beta_{12}\)\(=\) \( ( - 3 \nu^{15} + 4 \nu^{14} - 4 \nu^{13} + 8 \nu^{12} - 15 \nu^{11} + 16 \nu^{10} - 12 \nu^{9} + \cdots - 384 ) / 64 \) Copy content Toggle raw display
\(\beta_{13}\)\(=\) \( ( 11 \nu^{15} - 8 \nu^{14} - 8 \nu^{13} - 20 \nu^{12} + 55 \nu^{11} - 20 \nu^{10} - 32 \nu^{9} + \cdots + 2304 ) / 192 \) Copy content Toggle raw display
\(\beta_{14}\)\(=\) \( ( 373 \nu^{15} - 708 \nu^{14} + 916 \nu^{13} - 1820 \nu^{12} + 4489 \nu^{11} - 7448 \nu^{10} + \cdots - 16000 ) / 6528 \) Copy content Toggle raw display
\(\beta_{15}\)\(=\) \( ( 193 \nu^{15} - 19 \nu^{14} - 328 \nu^{13} - 28 \nu^{12} + 113 \nu^{11} + 845 \nu^{10} - 2404 \nu^{9} + \cdots + 43776 ) / 3264 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( - \beta_{15} - \beta_{14} + \beta_{13} - \beta_{12} - \beta_{11} - \beta_{10} + 2 \beta_{9} + \cdots + \beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( -\beta_{15} + 4\beta_{13} - 3\beta_{11} - 5\beta_{8} + 2\beta_{6} - 2\beta_{5} + 2\beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 3 \beta_{15} + \beta_{14} + 3 \beta_{13} + 3 \beta_{12} - \beta_{11} + \beta_{10} - 4 \beta_{8} + \cdots + 4 ) / 8 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( -3\beta_{14} - 5\beta_{10} - \beta_{9} + 7\beta_{7} - 9\beta_{4} + \beta_{3} - 12 ) / 8 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( - \beta_{15} - 5 \beta_{14} + \beta_{13} - \beta_{12} - \beta_{11} - \beta_{10} + 2 \beta_{9} + \cdots + 12 ) / 8 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( 5\beta_{15} - 4\beta_{13} + 7\beta_{11} + \beta_{8} - 2\beta_{6} + 34\beta_{5} + 6\beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( - 15 \beta_{15} + 3 \beta_{14} + 5 \beta_{13} - 11 \beta_{12} - 3 \beta_{11} - 5 \beta_{10} + 4 \beta_{9} + \cdots - 4 ) / 8 \) Copy content Toggle raw display
\(\nu^{8}\)\(=\) \( ( -5\beta_{14} - 8\beta_{12} - 3\beta_{10} + 17\beta_{9} - 39\beta_{7} + 9\beta_{4} + 15\beta_{3} + 12 ) / 8 \) Copy content Toggle raw display
\(\nu^{9}\)\(=\) \( ( 21 \beta_{15} + 9 \beta_{14} - 33 \beta_{13} + 17 \beta_{12} + 29 \beta_{11} - 19 \beta_{10} - 22 \beta_{9} + \cdots - 12 ) / 8 \) Copy content Toggle raw display
\(\nu^{10}\)\(=\) \( ( -45\beta_{15} + 12\beta_{13} + 17\beta_{11} + 79\beta_{8} + 26\beta_{6} + 6\beta_{5} - 80\beta_{2} - 30\beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{11}\)\(=\) \( ( - 29 \beta_{15} + 9 \beta_{14} + 43 \beta_{13} + 27 \beta_{12} + 31 \beta_{11} + 25 \beta_{10} + \cdots - 172 ) / 8 \) Copy content Toggle raw display
\(\nu^{12}\)\(=\) \( ( 93\beta_{14} + 48\beta_{12} + 27\beta_{10} - 177\beta_{9} + 87\beta_{7} - 121\beta_{4} + 49\beta_{3} + 84 ) / 8 \) Copy content Toggle raw display
\(\nu^{13}\)\(=\) \( ( - 73 \beta_{15} - 29 \beta_{14} - 63 \beta_{13} - 113 \beta_{12} + 7 \beta_{11} + 7 \beta_{10} + \cdots + 188 ) / 8 \) Copy content Toggle raw display
\(\nu^{14}\)\(=\) \( ( 21 \beta_{15} - 148 \beta_{13} + 23 \beta_{11} + 257 \beta_{8} - 18 \beta_{6} - 334 \beta_{5} + \cdots + 214 \beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{15}\)\(=\) \( ( 169 \beta_{15} + 203 \beta_{14} - 59 \beta_{13} + 21 \beta_{12} - 155 \beta_{11} + 147 \beta_{10} + \cdots + 508 ) / 8 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1248\mathbb{Z}\right)^\times\).

\(n\) \(703\) \(769\) \(833\) \(1093\)
\(\chi(n)\) \(-1\) \(1\) \(-1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
287.1
1.24942 0.662534i
1.24942 + 0.662534i
0.254324 1.39116i
0.254324 + 1.39116i
−1.12277 0.859879i
−1.12277 + 0.859879i
−0.810702 1.15878i
−0.810702 + 1.15878i
−1.15878 0.810702i
−1.15878 + 0.810702i
0.859879 + 1.12277i
0.859879 1.12277i
1.39116 0.254324i
1.39116 + 0.254324i
−0.662534 + 1.24942i
−0.662534 1.24942i
0 −1.71165 0.265070i 0 2.00908i 0 1.70391i 0 2.85948 + 0.907412i 0
287.2 0 −1.71165 + 0.265070i 0 2.00908i 0 1.70391i 0 2.85948 0.907412i 0
287.3 0 −1.09547 1.34162i 0 3.60516i 0 0.607725i 0 −0.599886 + 2.93941i 0
287.4 0 −1.09547 + 1.34162i 0 3.60516i 0 0.607725i 0 −0.599886 2.93941i 0
287.5 0 −0.559912 1.63905i 0 0.294389i 0 3.80389i 0 −2.37300 + 1.83545i 0
287.6 0 −0.559912 + 1.63905i 0 0.294389i 0 3.80389i 0 −2.37300 1.83545i 0
287.7 0 −0.238125 1.71560i 0 0.937964i 0 0.507749i 0 −2.88659 + 0.817056i 0
287.8 0 −0.238125 + 1.71560i 0 0.937964i 0 0.507749i 0 −2.88659 0.817056i 0
287.9 0 0.238125 1.71560i 0 0.937964i 0 0.507749i 0 −2.88659 0.817056i 0
287.10 0 0.238125 + 1.71560i 0 0.937964i 0 0.507749i 0 −2.88659 + 0.817056i 0
287.11 0 0.559912 1.63905i 0 0.294389i 0 3.80389i 0 −2.37300 1.83545i 0
287.12 0 0.559912 + 1.63905i 0 0.294389i 0 3.80389i 0 −2.37300 + 1.83545i 0
287.13 0 1.09547 1.34162i 0 3.60516i 0 0.607725i 0 −0.599886 2.93941i 0
287.14 0 1.09547 + 1.34162i 0 3.60516i 0 0.607725i 0 −0.599886 + 2.93941i 0
287.15 0 1.71165 0.265070i 0 2.00908i 0 1.70391i 0 2.85948 0.907412i 0
287.16 0 1.71165 + 0.265070i 0 2.00908i 0 1.70391i 0 2.85948 + 0.907412i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 287.16
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
12.b even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1248.2.d.c 16
3.b odd 2 1 inner 1248.2.d.c 16
4.b odd 2 1 inner 1248.2.d.c 16
8.b even 2 1 2496.2.d.p 16
8.d odd 2 1 2496.2.d.p 16
12.b even 2 1 inner 1248.2.d.c 16
24.f even 2 1 2496.2.d.p 16
24.h odd 2 1 2496.2.d.p 16
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1248.2.d.c 16 1.a even 1 1 trivial
1248.2.d.c 16 3.b odd 2 1 inner
1248.2.d.c 16 4.b odd 2 1 inner
1248.2.d.c 16 12.b even 2 1 inner
2496.2.d.p 16 8.b even 2 1
2496.2.d.p 16 8.d odd 2 1
2496.2.d.p 16 24.f even 2 1
2496.2.d.p 16 24.h odd 2 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{8} + 18T_{5}^{6} + 69T_{5}^{4} + 52T_{5}^{2} + 4 \) acting on \(S_{2}^{\mathrm{new}}(1248, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{16} \) Copy content Toggle raw display
$3$ \( T^{16} + 6 T^{14} + \cdots + 6561 \) Copy content Toggle raw display
$5$ \( (T^{8} + 18 T^{6} + 69 T^{4} + \cdots + 4)^{2} \) Copy content Toggle raw display
$7$ \( (T^{8} + 18 T^{6} + 53 T^{4} + \cdots + 4)^{2} \) Copy content Toggle raw display
$11$ \( (T^{8} - 56 T^{6} + \cdots + 1024)^{2} \) Copy content Toggle raw display
$13$ \( (T + 1)^{16} \) Copy content Toggle raw display
$17$ \( (T^{8} + 54 T^{6} + \cdots + 576)^{2} \) Copy content Toggle raw display
$19$ \( (T^{8} + 92 T^{6} + \cdots + 5184)^{2} \) Copy content Toggle raw display
$23$ \( (T^{8} - 144 T^{6} + \cdots + 43264)^{2} \) Copy content Toggle raw display
$29$ \( (T^{8} + 240 T^{6} + \cdots + 1048576)^{2} \) Copy content Toggle raw display
$31$ \( (T^{8} + 140 T^{6} + \cdots + 179776)^{2} \) Copy content Toggle raw display
$37$ \( (T^{4} - 2 T^{3} + \cdots - 156)^{4} \) Copy content Toggle raw display
$41$ \( (T^{8} + 132 T^{6} + \cdots + 87616)^{2} \) Copy content Toggle raw display
$43$ \( (T^{8} + 206 T^{6} + \cdots + 602176)^{2} \) Copy content Toggle raw display
$47$ \( (T^{8} - 258 T^{6} + \cdots + 10163344)^{2} \) Copy content Toggle raw display
$53$ \( (T^{8} + 136 T^{6} + \cdots + 36864)^{2} \) Copy content Toggle raw display
$59$ \( (T^{8} - 280 T^{6} + \cdots + 2876416)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} - 12 T^{3} + \cdots + 2624)^{4} \) Copy content Toggle raw display
$67$ \( (T^{8} + 252 T^{6} + \cdots + 3655744)^{2} \) Copy content Toggle raw display
$71$ \( (T^{8} - 210 T^{6} + \cdots + 44944)^{2} \) Copy content Toggle raw display
$73$ \( (T^{4} + 12 T^{3} + \cdots - 288)^{4} \) Copy content Toggle raw display
$79$ \( (T^{8} + 448 T^{6} + \cdots + 4194304)^{2} \) Copy content Toggle raw display
$83$ \( (T^{8} - 200 T^{6} + \cdots + 1048576)^{2} \) Copy content Toggle raw display
$89$ \( (T^{8} + 404 T^{6} + \cdots + 1498176)^{2} \) Copy content Toggle raw display
$97$ \( (T^{4} + 20 T^{3} + \cdots + 5792)^{4} \) Copy content Toggle raw display
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