Properties

Label 3871.1.cg.a
Level $3871$
Weight $1$
Character orbit 3871.cg
Analytic conductor $1.932$
Analytic rank $0$
Dimension $24$
Projective image $D_{78}$
CM discriminant -7
Inner twists $4$

Related objects

Downloads

Learn more

Show commands: Magma / Pari/GP / SageMath

Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [3871,1,Mod(30,3871)] mf = mfinit([N,k,chi],0) lf = mfeigenbasis(mf)
 
Copy content magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code chi := DirichletCharacter("3871.30"); S:= CuspForms(chi, 1); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(3871, base_ring=CyclotomicField(78)) chi = DirichletCharacter(H, H._module([26, 67])) B = ModularForms(chi, 1).cuspidal_submodule().basis() N = [B[i] for i in range(len(B))]
 
Level: \( N \) \(=\) \( 3871 = 7^{2} \cdot 79 \)
Weight: \( k \) \(=\) \( 1 \)
Character orbit: \([\chi]\) \(=\) 3871.cg (of order \(78\), degree \(24\), not minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(0)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(1.93188066390\)
Analytic rank: \(0\)
Dimension: \(24\)
Coefficient field: \(\Q(\zeta_{39})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{24} - x^{23} + x^{21} - x^{20} + x^{18} - x^{17} + x^{15} - x^{14} + x^{12} - x^{10} + x^{9} + \cdots + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{4}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Projective image: \(D_{78}\)
Projective field: Galois closure of \(\mathbb{Q}[x]/(x^{78} - \cdots)\)

$q$-expansion

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

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

\(f(q)\) \(=\) \( q + (\zeta_{78}^{36} + \zeta_{78}^{34}) q^{2} + ( - \zeta_{78}^{33} + \cdots - \zeta_{78}^{29}) q^{4} + (\zeta_{78}^{30} + \cdots + \zeta_{78}^{24}) q^{8} + \zeta_{78}^{24} q^{9} + ( - \zeta_{78}^{20} - 1) q^{11}+ \cdots + ( - \zeta_{78}^{24} + \zeta_{78}^{5}) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 24 q - q^{2} - 15 q^{8} - 2 q^{9} - 25 q^{11} - q^{16} - q^{18} + 2 q^{22} - 2 q^{23} + 2 q^{25} - q^{46} + q^{50} + 13 q^{53} - 15 q^{64} + q^{67} - 15 q^{72} + q^{79} - 2 q^{81} + 13 q^{86} + 14 q^{88}+ \cdots + q^{99}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/3871\mathbb{Z}\right)^\times\).

\(n\) \(1030\) \(2845\)
\(\chi(n)\) \(\zeta_{78}^{11}\) \(-\zeta_{78}^{13}\)

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.

Copy content comment:embeddings in the coefficient field
 
Copy content gp:mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
30.1
−0.996757 + 0.0804666i
−0.0402659 0.999189i
−0.200026 + 0.979791i
−0.845190 0.534466i
0.428693 + 0.903450i
0.692724 0.721202i
0.799443 + 0.600742i
−0.632445 + 0.774605i
0.278217 + 0.960518i
−0.200026 0.979791i
0.948536 + 0.316668i
0.278217 0.960518i
−0.919979 + 0.391967i
−0.0402659 + 0.999189i
0.692724 + 0.721202i
0.799443 0.600742i
0.987050 + 0.160411i
−0.632445 0.774605i
0.948536 0.316668i
−0.919979 0.391967i
−1.89092 0.631282i 0 2.37762 + 1.78667i 0 0 0 −2.23556 3.23877i −0.354605 0.935016i 0
165.1 −0.0794890 0.0129182i 0 −0.942385 0.314614i 0 0 0 0.142152 + 0.0746073i 0.568065 0.822984i 0
312.1 −0.277125 + 0.288518i 0 0.0338217 + 0.839278i 0 0 0 −0.550962 0.488110i 0.120537 0.992709i 0
606.1 1.06907 + 1.30938i 0 −0.371525 + 1.81985i 0 0 0 −1.28330 + 0.673526i 0.568065 + 0.822984i 0
667.1 −0.171499 + 0.840058i 0 0.243694 + 0.103828i 0 0 0 −0.616065 + 0.892525i −0.354605 + 0.935016i 0
765.1 −1.38096 0.111482i 0 0.907561 + 0.147493i 0 0 0 0.108331 + 0.0267011i 0.885456 0.464723i 0
912.1 −1.35136 0.854550i 0 0.667232 + 1.40616i 0 0 0 0.107239 0.883189i −0.970942 + 0.239316i 0
1145.1 1.16367 + 0.495795i 0 0.415599 + 0.432684i 0 0 0 −0.179438 0.473138i −0.748511 0.663123i 0
1390.1 0.238540 + 0.502711i 0 0.436628 0.534772i 0 0 0 0.913255 + 0.225097i 0.885456 0.464723i 0
1402.1 −0.277125 0.288518i 0 0.0338217 0.839278i 0 0 0 −0.550962 + 0.488110i 0.120537 + 0.992709i 0
1586.1 0.527799 1.82217i 0 −2.19655 1.38902i 0 0 0 −2.27038 + 2.01139i 0.120537 + 0.992709i 0
1696.1 0.238540 0.502711i 0 0.436628 + 0.534772i 0 0 0 0.913255 0.225097i 0.885456 + 0.464723i 0
1733.1 0.0740877 1.83847i 0 −2.37771 0.191949i 0 0 0 −0.307268 + 2.53058i −0.970942 + 0.239316i 0
2088.1 −0.0794890 + 0.0129182i 0 −0.942385 + 0.314614i 0 0 0 0.142152 0.0746073i 0.568065 + 0.822984i 0
2272.1 −1.38096 + 0.111482i 0 0.907561 0.147493i 0 0 0 0.108331 0.0267011i 0.885456 + 0.464723i 0
2517.1 −1.35136 + 0.854550i 0 0.667232 1.40616i 0 0 0 0.107239 + 0.883189i −0.970942 0.239316i 0
2872.1 1.57818 1.18593i 0 0.806016 2.78269i 0 0 0 −1.32800 3.50165i −0.748511 0.663123i 0
2921.1 1.16367 0.495795i 0 0.415599 0.432684i 0 0 0 −0.179438 + 0.473138i −0.748511 + 0.663123i 0
3068.1 0.527799 + 1.82217i 0 −2.19655 + 1.38902i 0 0 0 −2.27038 2.01139i 0.120537 0.992709i 0
3460.1 0.0740877 + 1.83847i 0 −2.37771 + 0.191949i 0 0 0 −0.307268 2.53058i −0.970942 0.239316i 0
See all 24 embeddings
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 30.1
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
7.b odd 2 1 CM by \(\Q(\sqrt{-7}) \)
553.bf even 78 1 inner
553.bm odd 78 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 3871.1.cg.a 24
7.b odd 2 1 CM 3871.1.cg.a 24
7.c even 3 1 3871.1.bx.a 24
7.c even 3 1 3871.1.cc.a 24
7.d odd 6 1 3871.1.bx.a 24
7.d odd 6 1 3871.1.cc.a 24
79.h odd 78 1 3871.1.bx.a 24
553.bd odd 78 1 3871.1.cc.a 24
553.be even 78 1 3871.1.cc.a 24
553.bf even 78 1 inner 3871.1.cg.a 24
553.bl even 78 1 3871.1.bx.a 24
553.bm odd 78 1 inner 3871.1.cg.a 24
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
3871.1.bx.a 24 7.c even 3 1
3871.1.bx.a 24 7.d odd 6 1
3871.1.bx.a 24 79.h odd 78 1
3871.1.bx.a 24 553.bl even 78 1
3871.1.cc.a 24 7.c even 3 1
3871.1.cc.a 24 7.d odd 6 1
3871.1.cc.a 24 553.bd odd 78 1
3871.1.cc.a 24 553.be even 78 1
3871.1.cg.a 24 1.a even 1 1 trivial
3871.1.cg.a 24 7.b odd 2 1 CM
3871.1.cg.a 24 553.bf even 78 1 inner
3871.1.cg.a 24 553.bm odd 78 1 inner

Hecke kernels

This newform subspace is the entire newspace \(S_{1}^{\mathrm{new}}(3871, [\chi])\).

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{24} + T^{23} + \cdots + 1 \) Copy content Toggle raw display
$3$ \( T^{24} \) Copy content Toggle raw display
$5$ \( T^{24} \) Copy content Toggle raw display
$7$ \( T^{24} \) Copy content Toggle raw display
$11$ \( T^{24} + 25 T^{23} + \cdots + 1 \) Copy content Toggle raw display
$13$ \( T^{24} \) Copy content Toggle raw display
$17$ \( T^{24} \) Copy content Toggle raw display
$19$ \( T^{24} \) Copy content Toggle raw display
$23$ \( (T^{12} + T^{11} - 12 T^{10} + \cdots + 1)^{2} \) Copy content Toggle raw display
$29$ \( T^{24} - 26 T^{21} + \cdots + 169 \) Copy content Toggle raw display
$31$ \( T^{24} \) Copy content Toggle raw display
$37$ \( T^{24} - 26 T^{21} + \cdots + 169 \) Copy content Toggle raw display
$41$ \( T^{24} \) Copy content Toggle raw display
$43$ \( T^{24} + 26 T^{19} + \cdots + 169 \) Copy content Toggle raw display
$47$ \( T^{24} \) Copy content Toggle raw display
$53$ \( T^{24} - 13 T^{23} + \cdots + 169 \) Copy content Toggle raw display
$59$ \( T^{24} \) Copy content Toggle raw display
$61$ \( T^{24} \) Copy content Toggle raw display
$67$ \( T^{24} - T^{23} + \cdots + 1 \) Copy content Toggle raw display
$71$ \( (T^{12} + 13 T^{5} + \cdots + 13)^{2} \) Copy content Toggle raw display
$73$ \( T^{24} \) Copy content Toggle raw display
$79$ \( T^{24} - T^{23} + \cdots + 1 \) Copy content Toggle raw display
$83$ \( T^{24} \) Copy content Toggle raw display
$89$ \( T^{24} \) Copy content Toggle raw display
$97$ \( T^{24} \) Copy content Toggle raw display
show more
show less