Properties

Label 1397.1.l.a
Level $1397$
Weight $1$
Character orbit 1397.l
Analytic conductor $0.697$
Analytic rank $0$
Dimension $20$
Projective image $D_{25}$
CM discriminant -127
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1397,1,Mod(126,1397)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1397, base_ring=CyclotomicField(10))
 
chi = DirichletCharacter(H, H._module([4, 5]))
 
N = Newforms(chi, 1, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1397.126");
 
S:= CuspForms(chi, 1);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1397 = 11 \cdot 127 \)
Weight: \( k \) \(=\) \( 1 \)
Character orbit: \([\chi]\) \(=\) 1397.l (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: \(0.697193822648\)
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.

\(f(q)\) \(=\) \( q + ( - \zeta_{50}^{19} + \zeta_{50}^{16}) q^{2} + ( - \zeta_{50}^{13} + \cdots - \zeta_{50}^{7}) q^{4}+ \cdots - \zeta_{50}^{5} q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q + ( - \zeta_{50}^{19} + \zeta_{50}^{16}) q^{2} + ( - \zeta_{50}^{13} + \cdots - \zeta_{50}^{7}) q^{4}+ \cdots + \zeta_{50}^{18} q^{99}+O(q^{100}) \) 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 \( 20 q - 5 q^{4} - 5 q^{9} - 5 q^{16} - 5 q^{25} - 10 q^{32} - 10 q^{34} - 5 q^{36} + 15 q^{38} - 5 q^{44} - 5 q^{49} + 15 q^{52} - 10 q^{62} - 5 q^{64} + 15 q^{74} - 5 q^{81} - 5 q^{88}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1397\mathbb{Z}\right)^\times\).

\(n\) \(255\) \(892\)
\(\chi(n)\) \(\zeta_{50}^{10}\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
126.1
−0.968583 0.248690i
−0.0627905 0.998027i
−0.535827 + 0.844328i
0.929776 0.368125i
0.637424 + 0.770513i
0.187381 0.982287i
−0.876307 0.481754i
0.992115 0.125333i
−0.728969 + 0.684547i
0.425779 + 0.904827i
−0.968583 + 0.248690i
−0.0627905 + 0.998027i
−0.535827 0.844328i
0.929776 + 0.368125i
0.637424 0.770513i
0.187381 + 0.982287i
−0.876307 + 0.481754i
0.992115 + 0.125333i
−0.728969 0.684547i
0.425779 0.904827i
−0.574633 1.76854i 0 −1.98851 + 1.44474i 0 0 0 2.19334 + 1.59355i 0.309017 + 0.951057i 0
126.2 −0.393950 1.21245i 0 −0.505828 + 0.367505i 0 0 0 −0.386520 0.280823i 0.309017 + 0.951057i 0
126.3 0.0388067 + 0.119435i 0 0.796258 0.578516i 0 0 0 0.201592 + 0.146465i 0.309017 + 0.951057i 0
126.4 0.331159 + 1.01920i 0 −0.120092 + 0.0872517i 0 0 0 0.738289 + 0.536399i 0.309017 + 0.951057i 0
126.5 0.598617 + 1.84235i 0 −2.22691 + 1.61795i 0 0 0 −2.74670 1.99559i 0.309017 + 0.951057i 0
1015.1 −1.41789 + 1.03016i 0 0.640176 1.97026i 0 0 0 0.580394 + 1.78627i −0.809017 + 0.587785i 0
1015.2 −1.17950 + 0.856954i 0 0.347824 1.07049i 0 0 0 0.0565777 + 0.174128i −0.809017 + 0.587785i 0
1015.3 0.303189 0.220280i 0 −0.265616 + 0.817483i 0 0 0 0.215351 + 0.662783i −0.809017 + 0.587785i 0
1015.4 0.688925 0.500534i 0 −0.0849327 + 0.261396i 0 0 0 0.335471 + 1.03247i −0.809017 + 0.587785i 0
1015.5 1.60528 1.16630i 0 0.907634 2.79341i 0 0 0 −1.18779 3.65565i −0.809017 + 0.587785i 0
1142.1 −0.574633 + 1.76854i 0 −1.98851 1.44474i 0 0 0 2.19334 1.59355i 0.309017 0.951057i 0
1142.2 −0.393950 + 1.21245i 0 −0.505828 0.367505i 0 0 0 −0.386520 + 0.280823i 0.309017 0.951057i 0
1142.3 0.0388067 0.119435i 0 0.796258 + 0.578516i 0 0 0 0.201592 0.146465i 0.309017 0.951057i 0
1142.4 0.331159 1.01920i 0 −0.120092 0.0872517i 0 0 0 0.738289 0.536399i 0.309017 0.951057i 0
1142.5 0.598617 1.84235i 0 −2.22691 1.61795i 0 0 0 −2.74670 + 1.99559i 0.309017 0.951057i 0
1269.1 −1.41789 1.03016i 0 0.640176 + 1.97026i 0 0 0 0.580394 1.78627i −0.809017 0.587785i 0
1269.2 −1.17950 0.856954i 0 0.347824 + 1.07049i 0 0 0 0.0565777 0.174128i −0.809017 0.587785i 0
1269.3 0.303189 + 0.220280i 0 −0.265616 0.817483i 0 0 0 0.215351 0.662783i −0.809017 0.587785i 0
1269.4 0.688925 + 0.500534i 0 −0.0849327 0.261396i 0 0 0 0.335471 1.03247i −0.809017 0.587785i 0
1269.5 1.60528 + 1.16630i 0 0.907634 + 2.79341i 0 0 0 −1.18779 + 3.65565i −0.809017 0.587785i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 126.5
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
127.b odd 2 1 CM by \(\Q(\sqrt{-127}) \)
11.c even 5 1 inner
1397.l odd 10 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1397.1.l.a 20
11.c even 5 1 inner 1397.1.l.a 20
127.b odd 2 1 CM 1397.1.l.a 20
1397.l odd 10 1 inner 1397.1.l.a 20
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1397.1.l.a 20 1.a even 1 1 trivial
1397.1.l.a 20 11.c even 5 1 inner
1397.1.l.a 20 127.b odd 2 1 CM
1397.1.l.a 20 1397.l odd 10 1 inner

Hecke kernels

This newform subspace is the entire newspace \(S_{1}^{\mathrm{new}}(1397, [\chi])\).

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
$5$ \( T^{20} \) 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
$17$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$19$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$23$ \( T^{20} \) 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
$37$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$41$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$43$ \( T^{20} \) Copy content Toggle raw display
$47$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$53$ \( T^{20} \) Copy content Toggle raw display
$59$ \( T^{20} \) Copy content Toggle raw display
$61$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$67$ \( T^{20} \) Copy content Toggle raw display
$71$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$73$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$79$ \( T^{20} + 5 T^{18} + \cdots + 1 \) Copy content Toggle raw display
$83$ \( T^{20} \) Copy content Toggle raw display
$89$ \( T^{20} \) Copy content Toggle raw display
$97$ \( T^{20} \) Copy content Toggle raw display
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