Properties

Label 869.1.j.a
Level $869$
Weight $1$
Character orbit 869.j
Analytic conductor $0.434$
Analytic rank $0$
Dimension $20$
Projective image $D_{25}$
CM discriminant -79
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [869,1,Mod(157,869)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(869, base_ring=CyclotomicField(10))
 
chi = DirichletCharacter(H, H._module([8, 5]))
 
N = Newforms(chi, 1, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("869.157");
 
S:= CuspForms(chi, 1);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 869 = 11 \cdot 79 \)
Weight: \( k \) \(=\) \( 1 \)
Character orbit: \([\chi]\) \(=\) 869.j (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: \(0.433687495978\)
Analytic rank: \(0\)
Dimension: \(20\)
Relative dimension: \(5\) over \(\Q(\zeta_{10})\)
Coefficient field: \(\Q(\zeta_{50})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{20} - x^{15} + x^{10} - x^{5} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{11}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Projective image: \(D_{25}\)
Projective field: Galois closure of \(\mathbb{Q}[x]/(x^{25} - \cdots)\)

$q$-expansion

comment: q-expansion
 
sage: f.q_expansion() # note that sage often uses an isomorphic number field
 
gp: mfcoefs(f, 20)
 

The \(q\)-expansion and trace form are shown below.

\(f(q)\) \(=\) \( q + ( - \zeta_{50}^{21} - \zeta_{50}^{9}) q^{2} + (\zeta_{50}^{18} + \cdots - \zeta_{50}^{5}) q^{4}+ \cdots - \zeta_{50}^{15} q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q + ( - \zeta_{50}^{21} - \zeta_{50}^{9}) q^{2} + (\zeta_{50}^{18} + \cdots - \zeta_{50}^{5}) q^{4}+ \cdots - \zeta_{50}^{21} q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 20 q - 5 q^{4} - 5 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 20 q - 5 q^{4} - 5 q^{9} - 5 q^{16} + 15 q^{20} - 5 q^{22} - 5 q^{25} + 15 q^{26} - 10 q^{32} - 5 q^{36} - 10 q^{40} - 5 q^{49} - 10 q^{50} - 10 q^{62} - 5 q^{64} - 10 q^{76} - 5 q^{79} - 10 q^{80} - 5 q^{81} + 15 q^{83} - 5 q^{88} + 15 q^{92} + 15 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/869\mathbb{Z}\right)^\times\).

\(n\) \(475\) \(793\)
\(\chi(n)\) \(-\zeta_{50}^{5}\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
157.1
−0.535827 0.844328i
0.637424 0.770513i
−0.968583 + 0.248690i
0.929776 + 0.368125i
−0.0627905 + 0.998027i
−0.876307 0.481754i
0.187381 0.982287i
−0.728969 + 0.684547i
0.992115 0.125333i
0.425779 + 0.904827i
−0.876307 + 0.481754i
0.187381 + 0.982287i
−0.728969 0.684547i
0.992115 + 0.125333i
0.425779 0.904827i
−0.535827 + 0.844328i
0.637424 + 0.770513i
−0.968583 0.248690i
0.929776 0.368125i
−0.0627905 0.998027i
−1.56720 + 1.13864i 0 0.850604 2.61789i 1.60528 + 1.16630i 0 0 1.04914 + 3.22894i −0.809017 + 0.587785i −3.84378
157.2 −0.866986 + 0.629902i 0 0.0458709 0.141176i −1.41789 1.03016i 0 0 −0.282001 0.867911i −0.809017 + 0.587785i 1.87819
157.3 −0.101597 + 0.0738147i 0 −0.304144 + 0.936058i −1.17950 0.856954i 0 0 −0.0770013 0.236986i −0.809017 + 0.587785i 0.183089
157.4 1.03137 0.749337i 0 0.193209 0.594636i 0.688925 + 0.500534i 0 0 0.147638 + 0.454382i −0.809017 + 0.587785i 1.08561
157.5 1.50441 1.09302i 0 0.759544 2.33764i 0.303189 + 0.220280i 0 0 −0.837780 2.57842i −0.809017 + 0.587785i 0.696891
236.1 −0.613161 1.88711i 0 −2.37622 + 1.72642i 0.0388067 0.119435i 0 0 3.10969 + 2.25932i 0.309017 + 0.951057i −0.249182
236.2 −0.263146 0.809880i 0 0.222357 0.161552i 0.331159 1.01920i 0 0 −0.878275 0.638104i 0.309017 + 0.951057i −0.912576
236.3 −0.115808 0.356420i 0 0.695393 0.505233i −0.393950 + 1.21245i 0 0 −0.563797 0.409622i 0.309017 + 0.951057i 0.477765
236.4 0.450527 + 1.38658i 0 −0.910614 + 0.661600i −0.574633 + 1.76854i 0 0 −0.148122 0.107617i 0.309017 + 0.951057i −2.71111
236.5 0.541587 + 1.66683i 0 −1.67600 + 1.21769i 0.598617 1.84235i 0 0 −1.51949 1.10397i 0.309017 + 0.951057i 3.39510
394.1 −0.613161 + 1.88711i 0 −2.37622 1.72642i 0.0388067 + 0.119435i 0 0 3.10969 2.25932i 0.309017 0.951057i −0.249182
394.2 −0.263146 + 0.809880i 0 0.222357 + 0.161552i 0.331159 + 1.01920i 0 0 −0.878275 + 0.638104i 0.309017 0.951057i −0.912576
394.3 −0.115808 + 0.356420i 0 0.695393 + 0.505233i −0.393950 1.21245i 0 0 −0.563797 + 0.409622i 0.309017 0.951057i 0.477765
394.4 0.450527 1.38658i 0 −0.910614 0.661600i −0.574633 1.76854i 0 0 −0.148122 + 0.107617i 0.309017 0.951057i −2.71111
394.5 0.541587 1.66683i 0 −1.67600 1.21769i 0.598617 + 1.84235i 0 0 −1.51949 + 1.10397i 0.309017 0.951057i 3.39510
631.1 −1.56720 1.13864i 0 0.850604 + 2.61789i 1.60528 1.16630i 0 0 1.04914 3.22894i −0.809017 0.587785i −3.84378
631.2 −0.866986 0.629902i 0 0.0458709 + 0.141176i −1.41789 + 1.03016i 0 0 −0.282001 + 0.867911i −0.809017 0.587785i 1.87819
631.3 −0.101597 0.0738147i 0 −0.304144 0.936058i −1.17950 + 0.856954i 0 0 −0.0770013 + 0.236986i −0.809017 0.587785i 0.183089
631.4 1.03137 + 0.749337i 0 0.193209 + 0.594636i 0.688925 0.500534i 0 0 0.147638 0.454382i −0.809017 0.587785i 1.08561
631.5 1.50441 + 1.09302i 0 0.759544 + 2.33764i 0.303189 0.220280i 0 0 −0.837780 + 2.57842i −0.809017 0.587785i 0.696891
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 157.5
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
79.b odd 2 1 CM by \(\Q(\sqrt{-79}) \)
11.c even 5 1 inner
869.j odd 10 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 869.1.j.a 20
11.c even 5 1 inner 869.1.j.a 20
79.b odd 2 1 CM 869.1.j.a 20
869.j odd 10 1 inner 869.1.j.a 20
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
869.1.j.a 20 1.a even 1 1 trivial
869.1.j.a 20 11.c even 5 1 inner
869.1.j.a 20 79.b odd 2 1 CM
869.1.j.a 20 869.j odd 10 1 inner

Hecke kernels

This newform subspace is the entire newspace \(S_{1}^{\mathrm{new}}(869, [\chi])\).

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$3$ \( T^{20} \) Copy content Toggle raw display
$5$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$7$ \( T^{20} \) Copy content Toggle raw display
$11$ \( T^{20} + T^{15} + \cdots + 1 \) Copy content Toggle raw display
$13$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$17$ \( T^{20} \) Copy content Toggle raw display
$19$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$23$ \( (T^{10} - 10 T^{8} + \cdots - 1)^{2} \) Copy content Toggle raw display
$29$ \( T^{20} \) Copy content Toggle raw display
$31$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$37$ \( T^{20} \) Copy content Toggle raw display
$41$ \( T^{20} \) 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
$59$ \( T^{20} \) Copy content Toggle raw display
$61$ \( T^{20} \) Copy content Toggle raw display
$67$ \( (T^{10} - 10 T^{8} + \cdots - 1)^{2} \) Copy content Toggle raw display
$71$ \( T^{20} \) Copy content Toggle raw display
$73$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$79$ \( (T^{4} + T^{3} + T^{2} + \cdots + 1)^{5} \) Copy content Toggle raw display
$83$ \( (T^{4} - 3 T^{3} + 4 T^{2} + \cdots + 1)^{5} \) Copy content Toggle raw display
$89$ \( (T^{10} - 10 T^{8} + \cdots - 1)^{2} \) Copy content Toggle raw display
$97$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
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