Properties

Label 2020.1.bt.c
Level $2020$
Weight $1$
Character orbit 2020.bt
Analytic conductor $1.008$
Analytic rank $0$
Dimension $40$
Projective image $D_{50}$
CM discriminant -20
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [2020,1,Mod(279,2020)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2020, base_ring=CyclotomicField(50))
 
chi = DirichletCharacter(H, H._module([25, 25, 11]))
 
N = Newforms(chi, 1, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2020.279");
 
S:= CuspForms(chi, 1);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2020 = 2^{2} \cdot 5 \cdot 101 \)
Weight: \( k \) \(=\) \( 1 \)
Character orbit: \([\chi]\) \(=\) 2020.bt (of order \(50\), degree \(20\), 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: \(1.00811132552\)
Analytic rank: \(0\)
Dimension: \(40\)
Relative dimension: \(2\) over \(\Q(\zeta_{50})\)
Coefficient field: \(\Q(\zeta_{100})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{40} - x^{30} + x^{20} - x^{10} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Projective image: \(D_{50}\)
Projective field: Galois closure of \(\mathbb{Q}[x]/(x^{50} - \cdots)\)

$q$-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.

\(f(q)\) \(=\) \( q - \zeta_{100} q^{2} + ( - \zeta_{100}^{23} - \zeta_{100}^{15}) q^{3} + \zeta_{100}^{2} q^{4} - \zeta_{100}^{24} q^{5} + (\zeta_{100}^{24} + \zeta_{100}^{16}) q^{6} + ( - \zeta_{100}^{35} + \zeta_{100}^{33}) q^{7} - \zeta_{100}^{3} q^{8} + (\zeta_{100}^{46} + \cdots + \zeta_{100}^{30}) q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q - \zeta_{100} q^{2} + ( - \zeta_{100}^{23} - \zeta_{100}^{15}) q^{3} + \zeta_{100}^{2} q^{4} - \zeta_{100}^{24} q^{5} + (\zeta_{100}^{24} + \zeta_{100}^{16}) q^{6} + ( - \zeta_{100}^{35} + \zeta_{100}^{33}) q^{7} - \zeta_{100}^{3} q^{8} + (\zeta_{100}^{46} + \cdots + \zeta_{100}^{30}) q^{9} + \cdots + (\zeta_{100}^{21} + \cdots + \zeta_{100}^{17}) q^{98} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 40 q + 10 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 40 q + 10 q^{9} - 40 q^{21} - 10 q^{29} + 10 q^{30} - 10 q^{36} - 10 q^{45} - 10 q^{46} + 10 q^{49} + 10 q^{54} + 10 q^{61} + 10 q^{70} - 10 q^{81} + 30 q^{84} + 10 q^{94} - 10 q^{96}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2020\mathbb{Z}\right)^\times\).

\(n\) \(1011\) \(1617\) \(1921\)
\(\chi(n)\) \(-1\) \(-1\) \(\zeta_{100}^{2}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
279.1
0.770513 + 0.637424i
−0.770513 0.637424i
0.998027 0.0627905i
−0.998027 + 0.0627905i
0.684547 0.728969i
−0.684547 + 0.728969i
0.481754 0.876307i
−0.481754 + 0.876307i
0.844328 0.535827i
−0.844328 + 0.535827i
0.982287 0.187381i
−0.982287 + 0.187381i
0.481754 + 0.876307i
−0.481754 0.876307i
0.368125 + 0.929776i
−0.368125 0.929776i
0.844328 + 0.535827i
−0.844328 0.535827i
0.248690 0.968583i
−0.248690 + 0.968583i
−0.770513 0.637424i 1.57007 + 0.996398i 0.187381 + 0.982287i 0.637424 + 0.770513i −0.574633 1.76854i −1.27233 + 0.0800484i 0.481754 0.876307i 1.04654 + 2.22401i 1.00000i
279.2 0.770513 + 0.637424i −1.57007 0.996398i 0.187381 + 0.982287i 0.637424 + 0.770513i −0.574633 1.76854i 1.27233 0.0800484i −0.481754 + 0.876307i 1.04654 + 2.22401i 1.00000i
379.1 −0.998027 + 0.0627905i −0.713118 + 1.80113i 0.992115 0.125333i −0.0627905 + 0.998027i 0.598617 1.84235i 0.106032 0.0672897i −0.982287 + 0.187381i −2.00657 1.88429i 1.00000i
379.2 0.998027 0.0627905i 0.713118 1.80113i 0.992115 0.125333i −0.0627905 + 0.998027i 0.598617 1.84235i −0.106032 + 0.0672897i 0.982287 0.187381i −2.00657 1.88429i 1.00000i
399.1 −0.684547 + 0.728969i −1.94908 0.371808i −0.0627905 0.998027i −0.728969 + 0.684547i 1.60528 1.16630i 0.702367 1.27760i 0.770513 + 0.637424i 2.73091 + 1.08124i 1.00000i
399.2 0.684547 0.728969i 1.94908 + 0.371808i −0.0627905 0.998027i −0.728969 + 0.684547i 1.60528 1.16630i −0.702367 + 1.27760i −0.770513 0.637424i 2.73091 + 1.08124i 1.00000i
619.1 −0.481754 + 0.876307i 0.106729 0.844844i −0.535827 0.844328i −0.876307 + 0.481754i 0.688925 + 0.500534i −1.72157 + 0.328407i 0.998027 0.0627905i 0.266213 + 0.0683519i 1.00000i
619.2 0.481754 0.876307i −0.106729 + 0.844844i −0.535827 0.844328i −0.876307 + 0.481754i 0.688925 + 0.500534i 1.72157 0.328407i −0.998027 + 0.0627905i 0.266213 + 0.0683519i 1.00000i
639.1 −0.844328 + 0.535827i −0.317042 + 1.23480i 0.425779 0.904827i −0.535827 + 0.844328i −0.393950 1.21245i 0.394502 + 0.996398i 0.125333 + 0.992115i −0.547900 0.301210i 1.00000i
639.2 0.844328 0.535827i 0.317042 1.23480i 0.425779 0.904827i −0.535827 + 0.844328i −0.393950 1.21245i −0.394502 0.996398i −0.125333 0.992115i −0.547900 0.301210i 1.00000i
939.1 −0.982287 + 0.187381i 1.31918 0.620759i 0.929776 0.368125i 0.187381 0.982287i −1.17950 + 0.856954i 0.0469702 + 0.371808i −0.844328 + 0.535827i 0.717472 0.867275i 1.00000i
939.2 0.982287 0.187381i −1.31918 + 0.620759i 0.929776 0.368125i 0.187381 0.982287i −1.17950 + 0.856954i −0.0469702 0.371808i 0.844328 0.535827i 0.717472 0.867275i 1.00000i
979.1 −0.481754 0.876307i 0.106729 + 0.844844i −0.535827 + 0.844328i −0.876307 0.481754i 0.688925 0.500534i −1.72157 0.328407i 0.998027 + 0.0627905i 0.266213 0.0683519i 1.00000i
979.2 0.481754 + 0.876307i −0.106729 0.844844i −0.535827 + 0.844328i −0.876307 0.481754i 0.688925 0.500534i 1.72157 + 0.328407i −0.998027 0.0627905i 0.266213 0.0683519i 1.00000i
1019.1 −0.368125 0.929776i 0.0967619 + 0.0800484i −0.728969 + 0.684547i 0.929776 + 0.368125i 0.0388067 0.119435i 0.462452 + 1.80113i 0.904827 + 0.425779i −0.184426 0.966796i 1.00000i
1019.2 0.368125 + 0.929776i −0.0967619 0.0800484i −0.728969 + 0.684547i 0.929776 + 0.368125i 0.0388067 0.119435i −0.462452 1.80113i −0.904827 0.425779i −0.184426 0.966796i 1.00000i
1059.1 −0.844328 0.535827i −0.317042 1.23480i 0.425779 + 0.904827i −0.535827 0.844328i −0.393950 + 1.21245i 0.394502 0.996398i 0.125333 0.992115i −0.547900 + 0.301210i 1.00000i
1059.2 0.844328 + 0.535827i 0.317042 + 1.23480i 0.425779 + 0.904827i −0.535827 0.844328i −0.393950 + 1.21245i −0.394502 + 0.996398i −0.125333 + 0.992115i −0.547900 + 0.301210i 1.00000i
1259.1 −0.248690 + 0.968583i −1.06954 0.0672897i −0.876307 0.481754i −0.968583 + 0.248690i 0.331159 1.01920i 1.49261 + 1.23480i 0.684547 0.728969i 0.147271 + 0.0186046i 1.00000i
1259.2 0.248690 0.968583i 1.06954 + 0.0672897i −0.876307 0.481754i −0.968583 + 0.248690i 0.331159 1.01920i −1.49261 1.23480i −0.684547 + 0.728969i 0.147271 + 0.0186046i 1.00000i
See all 40 embeddings
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 279.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
20.d odd 2 1 CM by \(\Q(\sqrt{-5}) \)
4.b odd 2 1 inner
5.b even 2 1 inner
101.h even 50 1 inner
404.n odd 50 1 inner
505.w even 50 1 inner
2020.bt odd 50 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2020.1.bt.c 40
4.b odd 2 1 inner 2020.1.bt.c 40
5.b even 2 1 inner 2020.1.bt.c 40
20.d odd 2 1 CM 2020.1.bt.c 40
101.h even 50 1 inner 2020.1.bt.c 40
404.n odd 50 1 inner 2020.1.bt.c 40
505.w even 50 1 inner 2020.1.bt.c 40
2020.bt odd 50 1 inner 2020.1.bt.c 40
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
2020.1.bt.c 40 1.a even 1 1 trivial
2020.1.bt.c 40 4.b odd 2 1 inner
2020.1.bt.c 40 5.b even 2 1 inner
2020.1.bt.c 40 20.d odd 2 1 CM
2020.1.bt.c 40 101.h even 50 1 inner
2020.1.bt.c 40 404.n odd 50 1 inner
2020.1.bt.c 40 505.w even 50 1 inner
2020.1.bt.c 40 2020.bt odd 50 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{1}^{\mathrm{new}}(2020, [\chi])\):

\( T_{3}^{40} - 5 T_{3}^{38} + 15 T_{3}^{36} - 45 T_{3}^{34} + 190 T_{3}^{32} - 874 T_{3}^{30} + 3615 T_{3}^{28} + \cdots + 1 \) Copy content Toggle raw display
\( T_{13} \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{40} - T^{30} + \cdots + 1 \) Copy content Toggle raw display
$3$ \( T^{40} - 5 T^{38} + \cdots + 1 \) Copy content Toggle raw display
$5$ \( (T^{20} - T^{15} + T^{10} + \cdots + 1)^{2} \) Copy content Toggle raw display
$7$ \( T^{40} - 5 T^{38} + \cdots + 1 \) Copy content Toggle raw display
$11$ \( T^{40} \) Copy content Toggle raw display
$13$ \( T^{40} \) Copy content Toggle raw display
$17$ \( T^{40} \) Copy content Toggle raw display
$19$ \( T^{40} \) Copy content Toggle raw display
$23$ \( T^{40} - 10 T^{36} + \cdots + 25 \) Copy content Toggle raw display
$29$ \( (T^{20} + 5 T^{19} + \cdots + 5)^{2} \) Copy content Toggle raw display
$31$ \( T^{40} \) Copy content Toggle raw display
$37$ \( T^{40} \) Copy content Toggle raw display
$41$ \( (T^{20} - 5 T^{18} + \cdots + 5)^{2} \) Copy content Toggle raw display
$43$ \( T^{40} - 10 T^{36} + \cdots + 25 \) Copy content Toggle raw display
$47$ \( T^{40} - 10 T^{36} + \cdots + 25 \) Copy content Toggle raw display
$53$ \( T^{40} \) Copy content Toggle raw display
$59$ \( T^{40} \) Copy content Toggle raw display
$61$ \( (T^{20} - 5 T^{19} + \cdots + 5)^{2} \) Copy content Toggle raw display
$67$ \( T^{40} - 5 T^{38} + \cdots + 1 \) Copy content Toggle raw display
$71$ \( T^{40} \) Copy content Toggle raw display
$73$ \( T^{40} \) Copy content Toggle raw display
$79$ \( T^{40} \) Copy content Toggle raw display
$83$ \( T^{40} - 5 T^{38} + \cdots + 1 \) Copy content Toggle raw display
$89$ \( (T^{20} - 25 T^{15} + \cdots + 3125)^{2} \) Copy content Toggle raw display
$97$ \( T^{40} \) Copy content Toggle raw display
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