Properties

Label 927.2.c.b
Level $927$
Weight $2$
Character orbit 927.c
Analytic conductor $7.402$
Analytic rank $0$
Dimension $20$
CM discriminant -103
Inner twists $4$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [927,2,Mod(926,927)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(927, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("927.926");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 927 = 3^{2} \cdot 103 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 927.c (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: \(7.40213226737\)
Analytic rank: \(0\)
Dimension: \(20\)
Coefficient field: \(\mathbb{Q}[x]/(x^{20} + \cdots)\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{20} + 40 x^{18} + 680 x^{16} + 6400 x^{14} + 36400 x^{12} + 128128 x^{10} + 274560 x^{8} + \cdots + 1521 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{17}]\)
Coefficient ring index: \( 3^{9} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{2}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{19}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \beta_1 q^{2} + (\beta_{2} - 2) q^{4} - \beta_{6} q^{7} + (\beta_{3} - 2 \beta_1) q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_1 q^{2} + (\beta_{2} - 2) q^{4} - \beta_{6} q^{7} + (\beta_{3} - 2 \beta_1) q^{8} + \beta_{9} q^{13} + ( - \beta_{7} - \beta_{5}) q^{14} + (\beta_{4} - 2 \beta_{2} + 4) q^{16} + \beta_{12} q^{17} + ( - \beta_{15} + \beta_{4}) q^{19} + (\beta_{10} - \beta_{5}) q^{23} - 5 q^{25} + (\beta_{14} - \beta_{12} + \beta_{7}) q^{26} + ( - \beta_{13} + \beta_{9} + \cdots + 2 \beta_{6}) q^{28}+ \cdots + (\beta_{17} - 3 \beta_{16} + \cdots + 7 \beta_1) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 20 q - 40 q^{4}+O(q^{10}) \) Copy content Toggle raw display \( 20 q - 40 q^{4} + 80 q^{16} - 100 q^{25} + 140 q^{49} - 160 q^{64}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{20} + 40 x^{18} + 680 x^{16} + 6400 x^{14} + 36400 x^{12} + 128128 x^{10} + 274560 x^{8} + \cdots + 1521 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} + 4 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{3} + 6\nu \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( \nu^{4} + 8\nu^{2} + 8 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -2\nu^{11} - 35\nu^{9} - 190\nu^{7} - 260\nu^{5} + 400\nu^{3} + 592\nu ) / 65 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( \nu^{12} + 24\nu^{10} + 225\nu^{8} + 1040\nu^{6} + 2400\nu^{4} + 2304\nu^{2} + 416 ) / 65 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{13} + 26\nu^{11} + 260\nu^{9} + 1230\nu^{7} + 2660\nu^{5} + 1904\nu^{3} - 176\nu ) / 65 \) Copy content Toggle raw display
\(\beta_{8}\)\(=\) \( ( \nu^{10} + 20\nu^{8} + 140\nu^{6} + 400\nu^{4} + 400\nu^{2} + 64 ) / 5 \) Copy content Toggle raw display
\(\beta_{9}\)\(=\) \( ( \nu^{14} + 28\nu^{12} + 308\nu^{10} + 1680\nu^{8} + 4675\nu^{6} + 5924\nu^{4} + 2092\nu^{2} - 208 ) / 65 \) Copy content Toggle raw display
\(\beta_{10}\)\(=\) \( ( \nu^{11} + 24\nu^{9} + 212\nu^{7} + 832\nu^{5} + 1360\nu^{3} + 640\nu ) / 13 \) Copy content Toggle raw display
\(\beta_{11}\)\(=\) \( ( -6\nu^{12} - 144\nu^{10} - 1285\nu^{8} - 5200\nu^{6} - 9200\nu^{4} - 5504\nu^{2} - 416 ) / 65 \) Copy content Toggle raw display
\(\beta_{12}\)\(=\) \( ( 3\nu^{13} + 78\nu^{11} + 780\nu^{9} + 3755\nu^{7} + 8890\nu^{5} + 9352\nu^{3} + 3112\nu ) / 65 \) Copy content Toggle raw display
\(\beta_{13}\)\(=\) \( ( 2\nu^{14} + 56\nu^{12} + 616\nu^{10} + 3360\nu^{8} + 9415\nu^{6} + 12628\nu^{4} + 6524\nu^{2} + 624 ) / 65 \) Copy content Toggle raw display
\(\beta_{14}\)\(=\) \( ( \nu^{15} + 30\nu^{13} + 360\nu^{11} + 2200\nu^{9} + 7200\nu^{7} + 12154\nu^{5} + 9540\nu^{3} + 3080\nu ) / 65 \) Copy content Toggle raw display
\(\beta_{15}\)\(=\) \( ( \nu^{16} + 32 \nu^{14} + 416 \nu^{12} + 2816 \nu^{10} + 10560 \nu^{8} + 21504 \nu^{6} + 21518 \nu^{4} + \cdots + 624 ) / 65 \) Copy content Toggle raw display
\(\beta_{16}\)\(=\) \( ( \nu^{15} + 30\nu^{13} + 360\nu^{11} + 2200\nu^{9} + 7200\nu^{7} + 12089\nu^{5} + 8890\nu^{3} + 1780\nu ) / 65 \) Copy content Toggle raw display
\(\beta_{17}\)\(=\) \( ( \nu^{17} + 34 \nu^{15} + 476 \nu^{13} + 3536 \nu^{11} + 14960 \nu^{9} + 35904 \nu^{7} + 45696 \nu^{5} + \cdots + 4574 \nu ) / 65 \) Copy content Toggle raw display
\(\beta_{18}\)\(=\) \( ( \nu^{18} + 36 \nu^{16} + 540 \nu^{14} + 4368 \nu^{12} + 20592 \nu^{10} + 57024 \nu^{8} + 88704 \nu^{6} + \cdots + 728 ) / 65 \) Copy content Toggle raw display
\(\beta_{19}\)\(=\) \( ( \nu^{19} + 38 \nu^{17} + 608 \nu^{15} + 5320 \nu^{13} + 27664 \nu^{11} + 86944 \nu^{9} + \cdots + 9876 \nu ) / 65 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} - 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{3} - 6\beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{4} - 8\beta_{2} + 24 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( -\beta_{16} + \beta_{14} - 10\beta_{3} + 40\beta_1 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( \beta_{13} - 2\beta_{9} - 12\beta_{4} + 60\beta_{2} - 160 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( 14\beta_{16} - 14\beta_{14} + \beta_{12} - 3\beta_{7} + 84\beta_{3} - 280\beta_1 \) Copy content Toggle raw display
\(\nu^{8}\)\(=\) \( -16\beta_{13} + \beta_{11} + 32\beta_{9} + 6\beta_{6} + 112\beta_{4} - 448\beta_{2} + 1120 \) Copy content Toggle raw display
\(\nu^{9}\)\(=\) \( -144\beta_{16} + 144\beta_{14} - 18\beta_{12} + 2\beta_{10} + 54\beta_{7} + 5\beta_{5} - 672\beta_{3} + 2016\beta_1 \) Copy content Toggle raw display
\(\nu^{10}\)\(=\) \( 180\beta_{13} - 20\beta_{11} - 360\beta_{9} + 5\beta_{8} - 120\beta_{6} - 960\beta_{4} + 3360\beta_{2} - 8064 \) Copy content Toggle raw display
\(\nu^{11}\)\(=\) \( 1320 \beta_{16} - 1320 \beta_{14} + 220 \beta_{12} - 35 \beta_{10} - 660 \beta_{7} - 120 \beta_{5} + \cdots - 14784 \beta_1 \) Copy content Toggle raw display
\(\nu^{12}\)\(=\) \( - 1760 \beta_{13} + 255 \beta_{11} + 3520 \beta_{9} - 120 \beta_{8} + 1595 \beta_{6} + 7920 \beta_{4} + \cdots + 59136 \) Copy content Toggle raw display
\(\nu^{13}\)\(=\) \( - 11440 \beta_{16} + 11440 \beta_{14} - 2270 \beta_{12} + 390 \beta_{10} + 6875 \beta_{7} + \cdots + 109824 \beta_1 \) Copy content Toggle raw display
\(\nu^{14}\)\(=\) \( 16045 \beta_{13} - 2660 \beta_{11} - 32025 \beta_{9} + 1820 \beta_{8} - 17780 \beta_{6} - 64064 \beta_{4} + \cdots - 439296 \) Copy content Toggle raw display
\(\nu^{15}\)\(=\) \( 96154 \beta_{16} - 96089 \beta_{14} + 21300 \beta_{12} - 3500 \beta_{10} - 65850 \beta_{7} + \cdots - 823680 \beta_1 \) Copy content Toggle raw display
\(\nu^{16}\)\(=\) \( 65 \beta_{15} - 140704 \beta_{13} + 24800 \beta_{11} + 279328 \beta_{9} - 22400 \beta_{8} + \cdots + 3294720 \) Copy content Toggle raw display
\(\nu^{17}\)\(=\) \( 65 \beta_{17} - 794036 \beta_{16} + 791826 \beta_{14} - 188224 \beta_{12} + 27200 \beta_{10} + \cdots + 6223360 \beta_1 \) Copy content Toggle raw display
\(\nu^{18}\)\(=\) \( 65 \beta_{18} - 2340 \beta_{15} + 1205844 \beta_{13} - 215424 \beta_{11} - 2371908 \beta_{9} + \cdots - 24893440 \) Copy content Toggle raw display
\(\nu^{19}\)\(=\) \( 65 \beta_{19} - 2470 \beta_{17} + 6489336 \beta_{16} - 6444876 \beta_{14} + 1596912 \beta_{12} + \cdots - 47297684 \beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/927\mathbb{Z}\right)^\times\).

\(n\) \(722\) \(829\)
\(\chi(n)\) \(-1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
926.1
2.82236i
2.74145i
2.62699i
2.39220i
2.17447i
1.80877i
1.50910i
1.04830i
0.696015i
0.185206i
0.185206i
0.696015i
1.04830i
1.50910i
1.80877i
2.17447i
2.39220i
2.62699i
2.74145i
2.82236i
2.82236i 0 −5.96570 0 0 −5.22695 11.1926i 0 0
926.2 2.74145i 0 −5.51556 0 0 3.74435 9.63775i 0 0
926.3 2.62699i 0 −4.90107 0 0 4.71303 7.62108i 0 0
926.4 2.39220i 0 −3.72260 0 0 −0.831536 4.12080i 0 0
926.5 2.17447i 0 −2.72833 0 0 −2.39890 1.58374i 0 0
926.6 1.80877i 0 −1.27167 0 0 −2.39890 1.31739i 0 0
926.7 1.50910i 0 −0.277397 0 0 −0.831536 2.59959i 0 0
926.8 1.04830i 0 0.901071 0 0 4.71303 3.04119i 0 0
926.9 0.696015i 0 1.51556 0 0 3.74435 2.44688i 0 0
926.10 0.185206i 0 1.96570 0 0 −5.22695 0.734472i 0 0
926.11 0.185206i 0 1.96570 0 0 −5.22695 0.734472i 0 0
926.12 0.696015i 0 1.51556 0 0 3.74435 2.44688i 0 0
926.13 1.04830i 0 0.901071 0 0 4.71303 3.04119i 0 0
926.14 1.50910i 0 −0.277397 0 0 −0.831536 2.59959i 0 0
926.15 1.80877i 0 −1.27167 0 0 −2.39890 1.31739i 0 0
926.16 2.17447i 0 −2.72833 0 0 −2.39890 1.58374i 0 0
926.17 2.39220i 0 −3.72260 0 0 −0.831536 4.12080i 0 0
926.18 2.62699i 0 −4.90107 0 0 4.71303 7.62108i 0 0
926.19 2.74145i 0 −5.51556 0 0 3.74435 9.63775i 0 0
926.20 2.82236i 0 −5.96570 0 0 −5.22695 11.1926i 0 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 926.20
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
103.b odd 2 1 CM by \(\Q(\sqrt{-103}) \)
3.b odd 2 1 inner
309.c even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 927.2.c.b 20
3.b odd 2 1 inner 927.2.c.b 20
103.b odd 2 1 CM 927.2.c.b 20
309.c even 2 1 inner 927.2.c.b 20
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
927.2.c.b 20 1.a even 1 1 trivial
927.2.c.b 20 3.b odd 2 1 inner
927.2.c.b 20 103.b odd 2 1 CM
927.2.c.b 20 309.c even 2 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2}^{20} + 40 T_{2}^{18} + 680 T_{2}^{16} + 6400 T_{2}^{14} + 36400 T_{2}^{12} + 128128 T_{2}^{10} + \cdots + 1521 \) acting on \(S_{2}^{\mathrm{new}}(927, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{20} + 40 T^{18} + \cdots + 1521 \) Copy content Toggle raw display
$3$ \( T^{20} \) Copy content Toggle raw display
$5$ \( T^{20} \) Copy content Toggle raw display
$7$ \( (T^{5} - 35 T^{3} + \cdots + 184)^{4} \) Copy content Toggle raw display
$11$ \( T^{20} \) Copy content Toggle raw display
$13$ \( (T^{10} - 130 T^{8} + \cdots - 1648)^{2} \) Copy content Toggle raw display
$17$ \( T^{20} + \cdots + 2613001124484 \) Copy content Toggle raw display
$19$ \( (T^{5} - 95 T^{3} + \cdots - 2972)^{4} \) Copy content Toggle raw display
$23$ \( T^{20} + \cdots + 165186704840004 \) Copy content Toggle raw display
$29$ \( T^{20} + \cdots + 16\!\cdots\!36 \) Copy content Toggle raw display
$31$ \( T^{20} \) Copy content Toggle raw display
$37$ \( T^{20} \) Copy content Toggle raw display
$41$ \( T^{20} + \cdots + 53\!\cdots\!04 \) Copy content Toggle raw display
$43$ \( T^{20} \) Copy content Toggle raw display
$47$ \( T^{20} \) Copy content Toggle raw display
$53$ \( T^{20} \) Copy content Toggle raw display
$59$ \( T^{20} + \cdots + 44\!\cdots\!16 \) Copy content Toggle raw display
$61$ \( (T^{10} - 610 T^{8} + \cdots - 3225467248)^{2} \) Copy content Toggle raw display
$67$ \( T^{20} \) Copy content Toggle raw display
$71$ \( T^{20} \) Copy content Toggle raw display
$73$ \( T^{20} \) Copy content Toggle raw display
$79$ \( (T^{10} - 790 T^{8} + \cdots - 29812732)^{2} \) Copy content Toggle raw display
$83$ \( T^{20} + \cdots + 18\!\cdots\!96 \) Copy content Toggle raw display
$89$ \( T^{20} \) Copy content Toggle raw display
$97$ \( (T^{10} - 970 T^{8} + \cdots - 4250580928)^{2} \) Copy content Toggle raw display
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