Properties

Label 800.2.u.c
Level $800$
Weight $2$
Character orbit 800.u
Analytic conductor $6.388$
Analytic rank $0$
Dimension $8$
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] = [800,2,Mod(161,800)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(800, base_ring=CyclotomicField(10))
 
chi = DirichletCharacter(H, H._module([0, 0, 8]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("800.161");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 800 = 2^{5} \cdot 5^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 800.u (of order \(5\), degree \(4\), 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: \(6.38803216170\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(2\) over \(\Q(\zeta_{5})\)
Coefficient field: 8.0.1444000000.6
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 2x^{6} + 24x^{4} + 133x^{2} + 361 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{9}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{5}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (\beta_{6} + \beta_1) q^{3} + (2 \beta_{5} + 2 \beta_{3} + 1) q^{5} - 2 \beta_{4} q^{7} + ( - 4 \beta_{5} - \beta_{3} + \beta_{2} - 4) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + (\beta_{6} + \beta_1) q^{3} + (2 \beta_{5} + 2 \beta_{3} + 1) q^{5} - 2 \beta_{4} q^{7} + ( - 4 \beta_{5} - \beta_{3} + \beta_{2} - 4) q^{9} - \beta_{6} q^{11} + ( - 5 \beta_{5} - 4 \beta_{3} + \cdots - 5) q^{13}+ \cdots + (3 \beta_{7} - \beta_{4} - 3 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 20 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 20 q^{9} - 14 q^{13} + 14 q^{17} + 36 q^{21} + 40 q^{25} - 2 q^{29} + 18 q^{33} - 10 q^{37} + 6 q^{41} - 40 q^{45} + 88 q^{49} + 2 q^{53} + 60 q^{57} - 6 q^{61} - 50 q^{65} - 26 q^{69} - 62 q^{73} - 8 q^{77} + 28 q^{81} - 50 q^{85} + 10 q^{89} - 28 q^{93} - 46 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 2x^{6} + 24x^{4} + 133x^{2} + 361 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -9\nu^{6} + 77\nu^{4} - 2002\nu^{2} + 1444 ) / 8759 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -45\nu^{6} + 385\nu^{4} - 1251\nu^{2} - 1539 ) / 8759 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -45\nu^{7} + 385\nu^{5} - 1251\nu^{3} - 1539\nu ) / 8759 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( 121\nu^{6} - 62\nu^{4} + 1612\nu^{2} + 5890 ) / 8759 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 121\nu^{7} - 62\nu^{5} + 1612\nu^{3} + 5890\nu ) / 8759 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 130\nu^{7} - 139\nu^{5} + 3614\nu^{3} + 13205\nu ) / 8759 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{3} - 5\beta_{2} + 1 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( 5\beta_{7} - 5\beta_{6} + \beta_{4} - 4\beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( 9\beta_{5} + 26\beta_{3} - 9\beta_{2} \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( 9\beta_{7} + 26\beta_{4} - 9\beta_1 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 77\beta_{5} + 62\beta_{2} - 62 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( -62\beta_{7} + 139\beta_{6} \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/800\mathbb{Z}\right)^\times\).

\(n\) \(101\) \(351\) \(577\)
\(\chi(n)\) \(1\) \(1\) \(\beta_{3}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
161.1
0.568286 + 1.74900i
−0.568286 1.74900i
−1.91756 + 1.39319i
1.91756 1.39319i
−1.91756 1.39319i
1.91756 + 1.39319i
0.568286 1.74900i
−0.568286 + 1.74900i
0 −0.919506 + 2.82995i 0 2.23607 0 −3.67802 0 −4.73607 3.44095i 0
161.2 0 0.919506 2.82995i 0 2.23607 0 3.67802 0 −4.73607 3.44095i 0
321.1 0 −1.18512 0.861040i 0 −2.23607 0 −4.74048 0 −0.263932 0.812299i 0
321.2 0 1.18512 + 0.861040i 0 −2.23607 0 4.74048 0 −0.263932 0.812299i 0
481.1 0 −1.18512 + 0.861040i 0 −2.23607 0 −4.74048 0 −0.263932 + 0.812299i 0
481.2 0 1.18512 0.861040i 0 −2.23607 0 4.74048 0 −0.263932 + 0.812299i 0
641.1 0 −0.919506 2.82995i 0 2.23607 0 −3.67802 0 −4.73607 + 3.44095i 0
641.2 0 0.919506 + 2.82995i 0 2.23607 0 3.67802 0 −4.73607 + 3.44095i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 161.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 inner
25.d even 5 1 inner
100.j odd 10 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 800.2.u.c 8
4.b odd 2 1 inner 800.2.u.c 8
25.d even 5 1 inner 800.2.u.c 8
100.j odd 10 1 inner 800.2.u.c 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
800.2.u.c 8 1.a even 1 1 trivial
800.2.u.c 8 4.b odd 2 1 inner
800.2.u.c 8 25.d even 5 1 inner
800.2.u.c 8 100.j odd 10 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{8} + 13T_{3}^{6} + 64T_{3}^{4} - 38T_{3}^{2} + 361 \) acting on \(S_{2}^{\mathrm{new}}(800, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} + 13 T^{6} + \cdots + 361 \) Copy content Toggle raw display
$5$ \( (T^{2} - 5)^{4} \) Copy content Toggle raw display
$7$ \( (T^{4} - 36 T^{2} + 304)^{2} \) Copy content Toggle raw display
$11$ \( T^{8} + 7 T^{6} + \cdots + 361 \) Copy content Toggle raw display
$13$ \( (T^{4} + 7 T^{3} + \cdots + 361)^{2} \) Copy content Toggle raw display
$17$ \( (T^{4} - 7 T^{3} + \cdots + 361)^{2} \) Copy content Toggle raw display
$19$ \( T^{8} + 65 T^{6} + \cdots + 225625 \) Copy content Toggle raw display
$23$ \( T^{8} - 37 T^{6} + \cdots + 361 \) Copy content Toggle raw display
$29$ \( (T^{4} + T^{3} + 76 T^{2} + \cdots + 961)^{2} \) Copy content Toggle raw display
$31$ \( T^{8} - 23 T^{6} + \cdots + 361 \) Copy content Toggle raw display
$37$ \( (T^{4} + 5 T^{3} + 10 T^{2} + 25)^{2} \) Copy content Toggle raw display
$41$ \( (T^{4} - 3 T^{3} + 4 T^{2} + \cdots + 1)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} - 64 T^{2} + 304)^{2} \) Copy content Toggle raw display
$47$ \( T^{8} - 7 T^{6} + \cdots + 5285401 \) Copy content Toggle raw display
$53$ \( (T^{4} - T^{3} + 6 T^{2} + \cdots + 1)^{2} \) Copy content Toggle raw display
$59$ \( T^{8} + 163 T^{6} + \cdots + 361 \) Copy content Toggle raw display
$61$ \( (T^{4} + 3 T^{3} + 54 T^{2} + \cdots + 81)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} + 133 T^{6} + \cdots + 47045881 \) Copy content Toggle raw display
$71$ \( T^{8} - 23 T^{6} + \cdots + 361 \) Copy content Toggle raw display
$73$ \( (T^{4} + 31 T^{3} + \cdots + 43681)^{2} \) Copy content Toggle raw display
$79$ \( T^{8} - 7 T^{6} + \cdots + 5285401 \) Copy content Toggle raw display
$83$ \( T^{8} + 13 T^{6} + \cdots + 361 \) Copy content Toggle raw display
$89$ \( (T^{4} - 5 T^{3} + \cdots + 625)^{2} \) Copy content Toggle raw display
$97$ \( (T^{4} + 23 T^{3} + \cdots + 10201)^{2} \) Copy content Toggle raw display
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