Properties

Label 825.2.x.a
Level $825$
Weight $2$
Character orbit 825.x
Analytic conductor $6.588$
Analytic rank $0$
Dimension $8$
CM discriminant -11
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [825,2,Mod(131,825)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(825, base_ring=CyclotomicField(10))
 
chi = DirichletCharacter(H, H._module([5, 4, 5]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("825.131");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 825 = 3 \cdot 5^{2} \cdot 11 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 825.x (of order \(10\), 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: \(6.58765816676\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(2\) over \(\Q(\zeta_{10})\)
Coefficient field: 8.0.228765625.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{7} - 2x^{6} + 5x^{5} + x^{4} + 15x^{3} - 18x^{2} - 27x + 81 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{4}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{10}]$

$q$-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.

\(f(q)\) \(=\) \( q + \beta_{5} q^{3} + 2 \beta_{3} q^{4} + (\beta_{6} - 2) q^{5} + (3 \beta_{3} - \beta_1) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{5} q^{3} + 2 \beta_{3} q^{4} + (\beta_{6} - 2) q^{5} + (3 \beta_{3} - \beta_1) q^{9} + (2 \beta_{5} + \beta_{4}) q^{11} + ( - 2 \beta_{7} - 2 \beta_{2}) q^{12} + ( - 2 \beta_{5} - 3 \beta_{4}) q^{15} + ( - 4 \beta_{7} + 4 \beta_{4} + \cdots - 4) q^{16}+ \cdots + ( - 8 \beta_{7} - 5 \beta_{2}) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - q^{3} + 4 q^{4} - 12 q^{5} + 5 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - q^{3} + 4 q^{4} - 12 q^{5} + 5 q^{9} + 2 q^{12} - 4 q^{15} - 8 q^{16} - 6 q^{20} - 4 q^{25} + 8 q^{27} - 10 q^{31} + 11 q^{33} - 10 q^{36} + 14 q^{37} - 13 q^{45} + 16 q^{48} + 56 q^{49} - 11 q^{55} - 75 q^{59} + 8 q^{60} + 16 q^{64} - 39 q^{67} - 6 q^{69} + 17 q^{75} + 12 q^{80} - 7 q^{81} - 90 q^{92} + 90 q^{93} - 34 q^{97} + 11 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} - x^{7} - 2x^{6} + 5x^{5} + x^{4} + 15x^{3} - 18x^{2} - 27x + 81 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -\nu^{7} + \nu^{6} + 2\nu^{5} - 5\nu^{4} - \nu^{3} - 15\nu^{2} + 18\nu + 27 ) / 27 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{6} + 16\nu ) / 3 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -2\nu^{7} - 4\nu^{6} + 10\nu^{5} + 2\nu^{4} - 5\nu^{3} - 36\nu^{2} - 54\nu + 162 ) / 27 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -\nu^{7} - 2\nu^{6} + 5\nu^{5} + \nu^{4} + 2\nu^{3} - 18\nu^{2} - 27\nu + 81 ) / 9 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( \nu^{5} + 16 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -5\nu^{7} + 5\nu^{6} + 10\nu^{5} + 2\nu^{4} - 5\nu^{3} - 75\nu^{2} + 90\nu + 135 ) / 27 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( 2\beta_{7} + \beta_{6} - \beta_{5} - 3\beta_{4} - 3\beta_{3} - \beta_{2} + \beta _1 + 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( 2\beta_{5} - 3\beta_{4} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{7} - 5\beta_{2} \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( \beta_{6} - 16 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 3\beta_{3} - 16\beta_1 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( -35\beta_{7} - 13\beta_{6} + 13\beta_{5} + 48\beta_{4} + 48\beta_{3} + 13\beta_{2} - 13\beta _1 - 35 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/825\mathbb{Z}\right)^\times\).

\(n\) \(376\) \(551\) \(727\)
\(\chi(n)\) \(-1\) \(-1\) \(-\beta_{3}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
131.1
1.37924 + 1.04771i
−0.570223 1.63550i
1.37924 1.04771i
−0.570223 + 1.63550i
−1.73166 0.0369185i
1.42264 + 0.987975i
−1.73166 + 0.0369185i
1.42264 0.987975i
0 −1.42264 + 0.987975i 1.61803 1.17557i −1.50000 1.65831i 0 0 0 1.04781 2.81107i 0
131.2 0 1.73166 0.0369185i 1.61803 1.17557i −1.50000 + 1.65831i 0 0 0 2.99727 0.127860i 0
296.1 0 −1.42264 0.987975i 1.61803 + 1.17557i −1.50000 + 1.65831i 0 0 0 1.04781 + 2.81107i 0
296.2 0 1.73166 + 0.0369185i 1.61803 + 1.17557i −1.50000 1.65831i 0 0 0 2.99727 + 0.127860i 0
461.1 0 −1.37924 1.04771i −0.618034 + 1.90211i −1.50000 1.65831i 0 0 0 0.804606 + 2.89009i 0
461.2 0 0.570223 + 1.63550i −0.618034 + 1.90211i −1.50000 + 1.65831i 0 0 0 −2.34969 + 1.86519i 0
791.1 0 −1.37924 + 1.04771i −0.618034 1.90211i −1.50000 + 1.65831i 0 0 0 0.804606 2.89009i 0
791.2 0 0.570223 1.63550i −0.618034 1.90211i −1.50000 1.65831i 0 0 0 −2.34969 1.86519i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 131.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
11.b odd 2 1 CM by \(\Q(\sqrt{-11}) \)
75.j odd 10 1 inner
825.x even 10 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 825.2.x.a 8
3.b odd 2 1 825.2.x.b yes 8
11.b odd 2 1 CM 825.2.x.a 8
25.d even 5 1 825.2.x.b yes 8
33.d even 2 1 825.2.x.b yes 8
75.j odd 10 1 inner 825.2.x.a 8
275.v odd 10 1 825.2.x.b yes 8
825.x even 10 1 inner 825.2.x.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
825.2.x.a 8 1.a even 1 1 trivial
825.2.x.a 8 11.b odd 2 1 CM
825.2.x.a 8 75.j odd 10 1 inner
825.2.x.a 8 825.x even 10 1 inner
825.2.x.b yes 8 3.b odd 2 1
825.2.x.b yes 8 25.d even 5 1
825.2.x.b yes 8 33.d even 2 1
825.2.x.b yes 8 275.v odd 10 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(825, [\chi])\):

\( T_{2} \) Copy content Toggle raw display
\( T_{23}^{8} - 11T_{23}^{6} + 1035T_{23}^{5} + 4146T_{23}^{4} - 11385T_{23}^{3} + 258569T_{23}^{2} + 1553535T_{23} + 2253001 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} + T^{7} + \cdots + 81 \) Copy content Toggle raw display
$5$ \( (T^{2} + 3 T + 5)^{4} \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( T^{8} - 11 T^{6} + \cdots + 14641 \) Copy content Toggle raw display
$13$ \( T^{8} \) Copy content Toggle raw display
$17$ \( T^{8} \) Copy content Toggle raw display
$19$ \( T^{8} \) Copy content Toggle raw display
$23$ \( T^{8} - 11 T^{6} + \cdots + 2253001 \) Copy content Toggle raw display
$29$ \( T^{8} \) Copy content Toggle raw display
$31$ \( T^{8} + 10 T^{7} + \cdots + 2418025 \) Copy content Toggle raw display
$37$ \( (T^{4} - 7 T^{3} + \cdots + 2401)^{2} \) Copy content Toggle raw display
$41$ \( T^{8} \) Copy content Toggle raw display
$43$ \( T^{8} \) Copy content Toggle raw display
$47$ \( T^{8} - 44 T^{6} + \cdots + 3748096 \) Copy content Toggle raw display
$53$ \( T^{8} - 176 T^{6} + \cdots + 2621161 \) Copy content Toggle raw display
$59$ \( T^{8} + 75 T^{7} + \cdots + 203946961 \) Copy content Toggle raw display
$61$ \( T^{8} \) Copy content Toggle raw display
$67$ \( T^{8} + 39 T^{7} + \cdots + 31460881 \) Copy content Toggle raw display
$71$ \( T^{8} - 275 T^{6} + \cdots + 10272025 \) Copy content Toggle raw display
$73$ \( T^{8} \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( T^{8} \) Copy content Toggle raw display
$89$ \( T^{8} - 275 T^{6} + \cdots + 51051025 \) Copy content Toggle raw display
$97$ \( T^{8} + 34 T^{7} + \cdots + 92140801 \) Copy content Toggle raw display
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