Properties

Label 3871.1.ch.a
Level $3871$
Weight $1$
Character orbit 3871.ch
Analytic conductor $1.932$
Analytic rank $0$
Dimension $24$
Projective image $D_{39}$
CM discriminant -7
Inner twists $4$

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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(31,3871)] 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("3871.31"); 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([13, 56])) 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.ch (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: no (minimal twist has level 553)
Projective image: \(D_{39}\)
Projective field: Galois closure of \(\mathbb{Q}[x]/(x^{39} - \cdots)\)

$q$-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.

\(f(q)\) \(=\) \( q + ( - \zeta_{78}^{33} - \zeta_{78}^{29}) q^{2} + ( - \zeta_{78}^{27} + \cdots - \zeta_{78}^{19}) q^{4} + ( - \zeta_{78}^{21} + \cdots - \zeta_{78}^{9}) q^{8} - \zeta_{78}^{9} q^{9} + ( - \zeta_{78} + 1) q^{11} + \cdots + (\zeta_{78}^{10} - \zeta_{78}^{9}) q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 24 q - q^{2} - 15 q^{8} - 2 q^{9} + 25 q^{11} - q^{16} - q^{18} - 2 q^{22} + 2 q^{23} - 2 q^{25} + 2 q^{29} + 2 q^{37} + 2 q^{43} + q^{46} - q^{50} - 11 q^{53} - 2 q^{58} - 15 q^{64} - q^{67} - 4 q^{71}+ \cdots - q^{99}+O(q^{100}) \) Copy content Toggle raw display

Character values

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

\(n\) \(1030\) \(2845\)
\(\chi(n)\) \(\zeta_{78}^{22}\) \(-\zeta_{78}^{26}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
31.1
−0.996757 + 0.0804666i
−0.0402659 + 0.999189i
0.278217 + 0.960518i
−0.845190 + 0.534466i
−0.200026 + 0.979791i
0.987050 0.160411i
0.428693 0.903450i
−0.996757 0.0804666i
0.948536 0.316668i
−0.919979 0.391967i
0.692724 + 0.721202i
−0.200026 0.979791i
0.799443 0.600742i
0.987050 + 0.160411i
−0.632445 + 0.774605i
0.799443 + 0.600742i
0.428693 + 0.903450i
0.948536 + 0.316668i
−0.919979 + 0.391967i
−0.845190 0.534466i
1.57818 + 1.18593i 0 0.806016 + 2.78269i 0 0 0 −1.32800 + 3.50165i −0.748511 + 0.663123i 0
129.1 −1.89092 + 0.631282i 0 2.37762 1.78667i 0 0 0 −2.23556 + 3.23877i −0.354605 + 0.935016i 0
313.1 1.06907 1.30938i 0 −0.371525 1.81985i 0 0 0 −1.28330 0.673526i 0.568065 0.822984i 0
325.1 −0.171499 0.840058i 0 0.243694 0.103828i 0 0 0 −0.616065 0.892525i −0.354605 0.935016i 0
411.1 0.0740877 + 1.83847i 0 −2.37771 + 0.191949i 0 0 0 −0.307268 2.53058i −0.970942 0.239316i 0
803.1 0.527799 + 1.82217i 0 −2.19655 + 1.38902i 0 0 0 −2.27038 2.01139i 0.120537 0.992709i 0
950.1 1.16367 0.495795i 0 0.415599 0.432684i 0 0 0 −0.179438 + 0.473138i −0.748511 + 0.663123i 0
999.1 1.57818 1.18593i 0 0.806016 2.78269i 0 0 0 −1.32800 3.50165i −0.748511 0.663123i 0
1354.1 −1.35136 + 0.854550i 0 0.667232 1.40616i 0 0 0 0.107239 + 0.883189i −0.970942 0.239316i 0
1599.1 −1.38096 + 0.111482i 0 0.907561 0.147493i 0 0 0 0.108331 0.0267011i 0.885456 + 0.464723i 0
1783.1 −0.0794890 + 0.0129182i 0 −0.942385 + 0.314614i 0 0 0 0.142152 0.0746073i 0.568065 + 0.822984i 0
2138.1 0.0740877 1.83847i 0 −2.37771 0.191949i 0 0 0 −0.307268 + 2.53058i −0.970942 + 0.239316i 0
2175.1 0.238540 0.502711i 0 0.436628 + 0.534772i 0 0 0 0.913255 0.225097i 0.885456 + 0.464723i 0
2285.1 0.527799 1.82217i 0 −2.19655 1.38902i 0 0 0 −2.27038 + 2.01139i 0.120537 + 0.992709i 0
2469.1 −0.277125 0.288518i 0 0.0338217 0.839278i 0 0 0 −0.550962 + 0.488110i 0.120537 + 0.992709i 0
2481.1 0.238540 + 0.502711i 0 0.436628 0.534772i 0 0 0 0.913255 + 0.225097i 0.885456 0.464723i 0
2726.1 1.16367 + 0.495795i 0 0.415599 + 0.432684i 0 0 0 −0.179438 0.473138i −0.748511 0.663123i 0
2959.1 −1.35136 0.854550i 0 0.667232 + 1.40616i 0 0 0 0.107239 0.883189i −0.970942 + 0.239316i 0
3106.1 −1.38096 0.111482i 0 0.907561 + 0.147493i 0 0 0 0.108331 + 0.0267011i 0.885456 0.464723i 0
3204.1 −0.171499 + 0.840058i 0 0.243694 + 0.103828i 0 0 0 −0.616065 + 0.892525i −0.354605 + 0.935016i 0
See all 24 embeddings
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 31.1
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.z even 39 1 inner
553.bn 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.ch.a 24
7.b odd 2 1 CM 3871.1.ch.a 24
7.c even 3 1 553.1.bg.a 24
7.c even 3 1 3871.1.bw.a 24
7.d odd 6 1 553.1.bg.a 24
7.d odd 6 1 3871.1.bw.a 24
79.g even 39 1 3871.1.bw.a 24
553.y even 39 1 553.1.bg.a 24
553.z even 39 1 inner 3871.1.ch.a 24
553.bc odd 78 1 553.1.bg.a 24
553.bg odd 78 1 3871.1.bw.a 24
553.bn odd 78 1 inner 3871.1.ch.a 24
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
553.1.bg.a 24 7.c even 3 1
553.1.bg.a 24 7.d odd 6 1
553.1.bg.a 24 553.y even 39 1
553.1.bg.a 24 553.bc odd 78 1
3871.1.bw.a 24 7.c even 3 1
3871.1.bw.a 24 7.d odd 6 1
3871.1.bw.a 24 79.g even 39 1
3871.1.bw.a 24 553.bg odd 78 1
3871.1.ch.a 24 1.a even 1 1 trivial
3871.1.ch.a 24 7.b odd 2 1 CM
3871.1.ch.a 24 553.z even 39 1 inner
3871.1.ch.a 24 553.bn 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
$29$ \( T^{24} - 2 T^{23} + \cdots + 1 \) Copy content Toggle raw display
$31$ \( T^{24} \) Copy content Toggle raw display
$37$ \( T^{24} - 2 T^{23} + \cdots + 1 \) Copy content Toggle raw display
$41$ \( T^{24} \) Copy content Toggle raw display
$43$ \( T^{24} - 2 T^{23} + \cdots + 1 \) Copy content Toggle raw display
$47$ \( T^{24} \) Copy content Toggle raw display
$53$ \( T^{24} + 11 T^{23} + \cdots + 1 \) 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
$71$ \( (T^{12} + 2 T^{11} + \cdots + 1)^{2} \) 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
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