Properties

Label 1920.2.s.f
Level $1920$
Weight $2$
Character orbit 1920.s
Analytic conductor $15.331$
Analytic rank $0$
Dimension $20$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1920,2,Mod(481,1920)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1920, base_ring=CyclotomicField(4))
 
chi = DirichletCharacter(H, H._module([0, 1, 0, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1920.481");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1920 = 2^{7} \cdot 3 \cdot 5 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1920.s (of order \(4\), 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: \(15.3312771881\)
Analytic rank: \(0\)
Dimension: \(20\)
Relative dimension: \(10\) over \(\Q(i)\)
Coefficient field: \(\mathbb{Q}[x]/(x^{20} - \cdots)\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{20} - 2 x^{18} - 4 x^{17} + 7 x^{16} + 16 x^{15} + 6 x^{14} - 36 x^{13} - 42 x^{12} + 40 x^{11} + \cdots + 1024 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{17}]\)
Coefficient ring index: \( 2^{20} \)
Twist minimal: no (minimal twist has level 240)
Sato-Tate group: $\mathrm{SU}(2)[C_{4}]$

$q$-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.

\(f(q)\) \(=\) \( q + \beta_1 q^{3} + \beta_{5} q^{5} - \beta_{13} q^{7} + \beta_{3} q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_1 q^{3} + \beta_{5} q^{5} - \beta_{13} q^{7} + \beta_{3} q^{9} + (\beta_{8} - \beta_{5}) q^{11} - \beta_{14} q^{13} - q^{15} + ( - \beta_{19} - 1) q^{17} + (\beta_{12} - \beta_{10} + \cdots + \beta_{6}) q^{19}+ \cdots + ( - \beta_{6} + \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 20 q+O(q^{10}) \) Copy content Toggle raw display \( 20 q + 8 q^{11} - 20 q^{15} - 24 q^{17} - 4 q^{19} - 16 q^{29} + 16 q^{33} - 16 q^{37} - 8 q^{43} - 52 q^{49} + 4 q^{51} + 16 q^{53} - 16 q^{59} + 4 q^{61} + 8 q^{63} - 8 q^{67} + 4 q^{69} + 40 q^{77} - 56 q^{79} - 20 q^{81} - 48 q^{83} - 4 q^{85} - 8 q^{91} - 16 q^{93} + 56 q^{97} + 8 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{20} - 2 x^{18} - 4 x^{17} + 7 x^{16} + 16 x^{15} + 6 x^{14} - 36 x^{13} - 42 x^{12} + 40 x^{11} + \cdots + 1024 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( 18 \nu^{19} + 33 \nu^{18} + 8 \nu^{17} - 104 \nu^{16} - 94 \nu^{15} + 199 \nu^{14} + 616 \nu^{13} + \cdots - 5632 ) / 512 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 5 \nu^{19} - 22 \nu^{18} - 84 \nu^{17} - 112 \nu^{16} + 107 \nu^{15} + 334 \nu^{14} + 24 \nu^{13} + \cdots - 23552 ) / 512 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( - 21 \nu^{19} + 10 \nu^{18} + 104 \nu^{17} + 192 \nu^{16} - 123 \nu^{15} - 594 \nu^{14} + \cdots + 28672 ) / 512 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 16 \nu^{19} + 10 \nu^{18} - 47 \nu^{17} - 138 \nu^{16} + 20 \nu^{15} + 394 \nu^{14} + 479 \nu^{13} + \cdots - 16896 ) / 256 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( - 31 \nu^{19} - 39 \nu^{18} + 30 \nu^{17} + 204 \nu^{16} + 67 \nu^{15} - 497 \nu^{14} - 946 \nu^{13} + \cdots + 17920 ) / 512 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 62 \nu^{19} + 3 \nu^{18} - 252 \nu^{17} - 544 \nu^{16} + 222 \nu^{15} + 1605 \nu^{14} + 1324 \nu^{13} + \cdots - 76288 ) / 512 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( - 23 \nu^{19} - 44 \nu^{18} - 6 \nu^{17} + 140 \nu^{16} + 135 \nu^{15} - 276 \nu^{14} - 854 \nu^{13} + \cdots + 6144 ) / 256 \) Copy content Toggle raw display
\(\beta_{8}\)\(=\) \( ( 11 \nu^{19} - 65 \nu^{18} - 202 \nu^{17} - 220 \nu^{16} + 337 \nu^{15} + 777 \nu^{14} - 210 \nu^{13} + \cdots - 45568 ) / 512 \) Copy content Toggle raw display
\(\beta_{9}\)\(=\) \( ( - 12 \nu^{19} + 9 \nu^{18} + 67 \nu^{17} + 116 \nu^{16} - 84 \nu^{15} - 365 \nu^{14} - 179 \nu^{13} + \cdots + 17920 ) / 128 \) Copy content Toggle raw display
\(\beta_{10}\)\(=\) \( ( - 31 \nu^{19} - 50 \nu^{18} + 2 \nu^{17} + 184 \nu^{16} + 135 \nu^{15} - 382 \nu^{14} - 1022 \nu^{13} + \cdots + 9728 ) / 256 \) Copy content Toggle raw display
\(\beta_{11}\)\(=\) \( ( - 66 \nu^{19} + 37 \nu^{18} + 350 \nu^{17} + 636 \nu^{16} - 418 \nu^{15} - 1989 \nu^{14} + \cdots + 98304 ) / 512 \) Copy content Toggle raw display
\(\beta_{12}\)\(=\) \( ( 79 \nu^{19} - 21 \nu^{18} - 364 \nu^{17} - 736 \nu^{16} + 389 \nu^{15} + 2197 \nu^{14} + 1568 \nu^{13} + \cdots - 108544 ) / 512 \) Copy content Toggle raw display
\(\beta_{13}\)\(=\) \( ( - 33 \nu^{19} + 22 \nu^{18} + 184 \nu^{17} + 328 \nu^{16} - 223 \nu^{15} - 1006 \nu^{14} + \cdots + 52736 ) / 256 \) Copy content Toggle raw display
\(\beta_{14}\)\(=\) \( ( - 41 \nu^{19} - 75 \nu^{18} - 24 \nu^{17} + 228 \nu^{16} + 221 \nu^{15} - 421 \nu^{14} - 1428 \nu^{13} + \cdots + 10240 ) / 256 \) Copy content Toggle raw display
\(\beta_{15}\)\(=\) \( ( - 56 \nu^{19} - 73 \nu^{18} + 46 \nu^{17} + 368 \nu^{16} + 148 \nu^{15} - 855 \nu^{14} - 1734 \nu^{13} + \cdots + 30720 ) / 256 \) Copy content Toggle raw display
\(\beta_{16}\)\(=\) \( ( - 57 \nu^{19} - 99 \nu^{18} - 6 \nu^{17} + 336 \nu^{16} + 269 \nu^{15} - 693 \nu^{14} - 1926 \nu^{13} + \cdots + 18432 ) / 256 \) Copy content Toggle raw display
\(\beta_{17}\)\(=\) \( ( - 70 \nu^{19} - 99 \nu^{18} + 48 \nu^{17} + 456 \nu^{16} + 218 \nu^{15} - 1045 \nu^{14} + \cdots + 36352 ) / 256 \) Copy content Toggle raw display
\(\beta_{18}\)\(=\) \( ( 38 \nu^{19} + 57 \nu^{18} - 16 \nu^{17} - 234 \nu^{16} - 130 \nu^{15} + 527 \nu^{14} + 1208 \nu^{13} + \cdots - 16512 ) / 128 \) Copy content Toggle raw display
\(\beta_{19}\)\(=\) \( ( 177 \nu^{19} + 256 \nu^{18} - 86 \nu^{17} - 1108 \nu^{16} - 577 \nu^{15} + 2496 \nu^{14} + \cdots - 86528 ) / 512 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{19} + \beta_{16} + \beta_{15} + \beta_{8} - \beta_{7} + \beta_{3} - \beta_{2} + \beta _1 - 1 ) / 4 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( -\beta_{17} - \beta_{15} + \beta_{14} - \beta_{12} - \beta_{9} + \beta_{7} - \beta_{6} + \beta_{2} - 2\beta _1 + 1 ) / 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( \beta_{16} + \beta_{15} - 2 \beta_{13} + 2 \beta_{11} - \beta_{10} - \beta_{9} - \beta_{8} - \beta_{7} + \cdots + 2 ) / 4 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( - \beta_{18} - 2 \beta_{17} + \beta_{16} - \beta_{15} - \beta_{14} + \beta_{13} + \beta_{11} + \beta_{10} + \cdots - 4 ) / 4 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( - \beta_{19} + \beta_{18} + \beta_{17} - \beta_{14} - \beta_{13} + 2 \beta_{11} - 3 \beta_{10} + \cdots - 6 ) / 4 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( - 4 \beta_{19} - 5 \beta_{17} - 2 \beta_{16} + \beta_{15} - \beta_{14} + 2 \beta_{13} + \beta_{12} + \cdots - 9 ) / 4 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( - 2 \beta_{19} - 4 \beta_{18} + 10 \beta_{17} - 9 \beta_{16} - \beta_{15} - 6 \beta_{14} - 4 \beta_{13} + \cdots - 8 ) / 4 \) Copy content Toggle raw display
\(\nu^{8}\)\(=\) \( ( 7 \beta_{18} + 2 \beta_{17} + 3 \beta_{16} + \beta_{15} - 3 \beta_{14} + 9 \beta_{13} + 4 \beta_{12} + \cdots + 2 ) / 4 \) Copy content Toggle raw display
\(\nu^{9}\)\(=\) \( ( - 3 \beta_{19} + 5 \beta_{18} + 5 \beta_{17} - 14 \beta_{16} + 6 \beta_{15} - \beta_{14} - \beta_{13} + \cdots - 8 ) / 4 \) Copy content Toggle raw display
\(\nu^{10}\)\(=\) \( ( - 4 \beta_{19} - 12 \beta_{18} + 5 \beta_{17} + 2 \beta_{16} - 9 \beta_{15} + \beta_{14} + 6 \beta_{13} + \cdots + 37 ) / 4 \) Copy content Toggle raw display
\(\nu^{11}\)\(=\) \( ( 6 \beta_{19} + 16 \beta_{18} + 6 \beta_{17} - 11 \beta_{16} + 5 \beta_{15} - 2 \beta_{14} - 20 \beta_{13} + \cdots + 32 ) / 4 \) Copy content Toggle raw display
\(\nu^{12}\)\(=\) \( ( 16 \beta_{19} + 21 \beta_{18} - 2 \beta_{17} + 53 \beta_{16} - 25 \beta_{15} + 43 \beta_{14} + 19 \beta_{13} + \cdots + 2 ) / 4 \) Copy content Toggle raw display
\(\nu^{13}\)\(=\) \( ( - 37 \beta_{19} - 41 \beta_{18} - 73 \beta_{17} + 10 \beta_{16} - 18 \beta_{15} - 27 \beta_{14} + \cdots + 148 ) / 4 \) Copy content Toggle raw display
\(\nu^{14}\)\(=\) \( ( 28 \beta_{19} - 12 \beta_{18} - 21 \beta_{17} + 46 \beta_{16} - 15 \beta_{15} + 63 \beta_{14} + \cdots - 269 ) / 4 \) Copy content Toggle raw display
\(\nu^{15}\)\(=\) \( ( - 46 \beta_{19} + 48 \beta_{18} - 38 \beta_{17} + 3 \beta_{16} - 85 \beta_{15} + 18 \beta_{14} + \cdots + 112 ) / 4 \) Copy content Toggle raw display
\(\nu^{16}\)\(=\) \( ( 64 \beta_{19} - 69 \beta_{18} - 30 \beta_{17} + 123 \beta_{16} + 105 \beta_{15} - 35 \beta_{14} + \cdots - 218 ) / 4 \) Copy content Toggle raw display
\(\nu^{17}\)\(=\) \( ( - 51 \beta_{19} - 175 \beta_{18} - 71 \beta_{17} - 170 \beta_{16} - 110 \beta_{15} - 29 \beta_{14} + \cdots - 268 ) / 4 \) Copy content Toggle raw display
\(\nu^{18}\)\(=\) \( ( 124 \beta_{19} + 292 \beta_{18} + 357 \beta_{17} - 158 \beta_{16} + 375 \beta_{15} + 81 \beta_{14} + \cdots - 139 ) / 4 \) Copy content Toggle raw display
\(\nu^{19}\)\(=\) \( ( 254 \beta_{19} - 112 \beta_{18} + 62 \beta_{17} - 171 \beta_{16} + 101 \beta_{15} - 58 \beta_{14} + \cdots + 392 ) / 4 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1920\mathbb{Z}\right)^\times\).

\(n\) \(511\) \(641\) \(901\) \(1537\)
\(\chi(n)\) \(1\) \(1\) \(-\beta_{3}\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
481.1
1.32147 + 0.503713i
−1.38431 0.289262i
−1.04932 + 0.948122i
−0.0861743 1.41159i
1.19834 0.750988i
−1.13207 0.847599i
1.15787 0.811989i
−0.720859 + 1.21670i
−0.491956 1.32589i
1.18701 + 0.768775i
1.19834 + 0.750988i
−0.0861743 + 1.41159i
−1.04932 0.948122i
−1.38431 + 0.289262i
1.32147 0.503713i
1.18701 0.768775i
−0.491956 + 1.32589i
−0.720859 1.21670i
1.15787 + 0.811989i
−1.13207 + 0.847599i
0 −0.707107 + 0.707107i 0 0.707107 + 0.707107i 0 2.69529i 0 1.00000i 0
481.2 0 −0.707107 + 0.707107i 0 0.707107 + 0.707107i 0 2.60796i 0 1.00000i 0
481.3 0 −0.707107 + 0.707107i 0 0.707107 + 0.707107i 0 0.740019i 0 1.00000i 0
481.4 0 −0.707107 + 0.707107i 0 0.707107 + 0.707107i 0 2.76462i 0 1.00000i 0
481.5 0 −0.707107 + 0.707107i 0 0.707107 + 0.707107i 0 3.79862i 0 1.00000i 0
481.6 0 0.707107 0.707107i 0 −0.707107 0.707107i 0 4.27253i 0 1.00000i 0
481.7 0 0.707107 0.707107i 0 −0.707107 0.707107i 0 2.18060i 0 1.00000i 0
481.8 0 0.707107 0.707107i 0 −0.707107 0.707107i 0 0.0588949i 0 1.00000i 0
481.9 0 0.707107 0.707107i 0 −0.707107 0.707107i 0 3.46600i 0 1.00000i 0
481.10 0 0.707107 0.707107i 0 −0.707107 0.707107i 0 4.92824i 0 1.00000i 0
1441.1 0 −0.707107 0.707107i 0 0.707107 0.707107i 0 3.79862i 0 1.00000i 0
1441.2 0 −0.707107 0.707107i 0 0.707107 0.707107i 0 2.76462i 0 1.00000i 0
1441.3 0 −0.707107 0.707107i 0 0.707107 0.707107i 0 0.740019i 0 1.00000i 0
1441.4 0 −0.707107 0.707107i 0 0.707107 0.707107i 0 2.60796i 0 1.00000i 0
1441.5 0 −0.707107 0.707107i 0 0.707107 0.707107i 0 2.69529i 0 1.00000i 0
1441.6 0 0.707107 + 0.707107i 0 −0.707107 + 0.707107i 0 4.92824i 0 1.00000i 0
1441.7 0 0.707107 + 0.707107i 0 −0.707107 + 0.707107i 0 3.46600i 0 1.00000i 0
1441.8 0 0.707107 + 0.707107i 0 −0.707107 + 0.707107i 0 0.0588949i 0 1.00000i 0
1441.9 0 0.707107 + 0.707107i 0 −0.707107 + 0.707107i 0 2.18060i 0 1.00000i 0
1441.10 0 0.707107 + 0.707107i 0 −0.707107 + 0.707107i 0 4.27253i 0 1.00000i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 481.10
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
16.e even 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1920.2.s.f 20
4.b odd 2 1 1920.2.s.e 20
8.b even 2 1 960.2.s.c 20
8.d odd 2 1 240.2.s.c 20
16.e even 4 1 960.2.s.c 20
16.e even 4 1 inner 1920.2.s.f 20
16.f odd 4 1 240.2.s.c 20
16.f odd 4 1 1920.2.s.e 20
24.f even 2 1 720.2.t.d 20
24.h odd 2 1 2880.2.t.d 20
48.i odd 4 1 2880.2.t.d 20
48.k even 4 1 720.2.t.d 20
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
240.2.s.c 20 8.d odd 2 1
240.2.s.c 20 16.f odd 4 1
720.2.t.d 20 24.f even 2 1
720.2.t.d 20 48.k even 4 1
960.2.s.c 20 8.b even 2 1
960.2.s.c 20 16.e even 4 1
1920.2.s.e 20 4.b odd 2 1
1920.2.s.e 20 16.f odd 4 1
1920.2.s.f 20 1.a even 1 1 trivial
1920.2.s.f 20 16.e even 4 1 inner
2880.2.t.d 20 24.h odd 2 1
2880.2.t.d 20 48.i odd 4 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1920, [\chi])\):

\( T_{7}^{20} + 96 T_{7}^{18} + 3880 T_{7}^{16} + 86368 T_{7}^{14} + 1161104 T_{7}^{12} + 9697664 T_{7}^{10} + \cdots + 262144 \) Copy content Toggle raw display
\( T_{11}^{20} - 8 T_{11}^{19} + 32 T_{11}^{18} - 112 T_{11}^{17} + 1808 T_{11}^{16} - 13696 T_{11}^{15} + \cdots + 1048576 \) Copy content Toggle raw display
\( T_{19}^{20} + 4 T_{19}^{19} + 8 T_{19}^{18} - 72 T_{19}^{17} + 5164 T_{19}^{16} + 17152 T_{19}^{15} + \cdots + 19716653056 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{20} \) Copy content Toggle raw display
$3$ \( (T^{4} + 1)^{5} \) Copy content Toggle raw display
$5$ \( (T^{4} + 1)^{5} \) Copy content Toggle raw display
$7$ \( T^{20} + 96 T^{18} + \cdots + 262144 \) Copy content Toggle raw display
$11$ \( T^{20} - 8 T^{19} + \cdots + 1048576 \) Copy content Toggle raw display
$13$ \( T^{20} + \cdots + 167981940736 \) Copy content Toggle raw display
$17$ \( (T^{10} + 12 T^{9} + \cdots - 20032)^{2} \) Copy content Toggle raw display
$19$ \( T^{20} + \cdots + 19716653056 \) Copy content Toggle raw display
$23$ \( T^{20} + \cdots + 217558810624 \) Copy content Toggle raw display
$29$ \( T^{20} + \cdots + 19723262623744 \) Copy content Toggle raw display
$31$ \( (T^{10} - 204 T^{8} + \cdots - 28698368)^{2} \) Copy content Toggle raw display
$37$ \( T^{20} + 16 T^{19} + \cdots + 18939904 \) Copy content Toggle raw display
$41$ \( T^{20} + \cdots + 3311118843904 \) Copy content Toggle raw display
$43$ \( T^{20} + \cdots + 3288334336 \) Copy content Toggle raw display
$47$ \( (T^{10} - 166 T^{8} + \cdots - 12544)^{2} \) Copy content Toggle raw display
$53$ \( T^{20} + \cdots + 4398046511104 \) Copy content Toggle raw display
$59$ \( T^{20} + \cdots + 16\!\cdots\!04 \) Copy content Toggle raw display
$61$ \( T^{20} + \cdots + 74350019584 \) Copy content Toggle raw display
$67$ \( T^{20} + \cdots + 210453397504 \) Copy content Toggle raw display
$71$ \( T^{20} + \cdots + 84783728164864 \) Copy content Toggle raw display
$73$ \( T^{20} + \cdots + 12\!\cdots\!76 \) Copy content Toggle raw display
$79$ \( (T^{10} + 28 T^{9} + \cdots + 46268416)^{2} \) Copy content Toggle raw display
$83$ \( T^{20} + \cdots + 76\!\cdots\!36 \) Copy content Toggle raw display
$89$ \( T^{20} + \cdots + 15\!\cdots\!36 \) Copy content Toggle raw display
$97$ \( (T^{10} - 28 T^{9} + \cdots - 37943296)^{2} \) Copy content Toggle raw display
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