Properties

Label 2420.1.n.j
Level $2420$
Weight $1$
Character orbit 2420.n
Analytic conductor $1.208$
Analytic rank $0$
Dimension $16$
Projective image $D_{6}$
CM discriminant -4
Inner twists $32$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [2420,1,Mod(1219,2420)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2420, base_ring=CyclotomicField(10))
 
chi = DirichletCharacter(H, H._module([5, 5, 6]))
 
N = Newforms(chi, 1, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2420.1219");
 
S:= CuspForms(chi, 1);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2420 = 2^{2} \cdot 5 \cdot 11^{2} \)
Weight: \( k \) \(=\) \( 1 \)
Character orbit: \([\chi]\) \(=\) 2420.n (of order \(10\), degree \(4\), not 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: \(1.20773733057\)
Analytic rank: \(0\)
Dimension: \(16\)
Relative dimension: \(4\) over \(\Q(\zeta_{10})\)
Coefficient field: \(\Q(\zeta_{60})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{16} + x^{14} - x^{10} - x^{8} - x^{6} + x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Projective image: \(D_{6}\)
Projective field: Galois closure of 6.0.322102000.2

$q$-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.

\(f(q)\) \(=\) \( q + \zeta_{60}^{9} q^{2} + \zeta_{60}^{18} q^{4} - \zeta_{60}^{26} q^{5} + \zeta_{60}^{27} q^{8} - \zeta_{60}^{24} q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q + \zeta_{60}^{9} q^{2} + \zeta_{60}^{18} q^{4} - \zeta_{60}^{26} q^{5} + \zeta_{60}^{27} q^{8} - \zeta_{60}^{24} q^{9} + \zeta_{60}^{5} q^{10} + \zeta_{60}^{9} q^{13} - \zeta_{60}^{6} q^{16} + \zeta_{60}^{21} q^{17} + \zeta_{60}^{3} q^{18} + \zeta_{60}^{14} q^{20} - \zeta_{60}^{22} q^{25} + \zeta_{60}^{18} q^{26} + ( - \zeta_{60}^{23} - \zeta_{60}^{13}) q^{29} - \zeta_{60}^{15} q^{32} - q^{34} + \zeta_{60}^{12} q^{36} + (\zeta_{60}^{28} - \zeta_{60}^{8}) q^{37} + \zeta_{60}^{23} q^{40} + (\zeta_{60}^{17} + \zeta_{60}^{7}) q^{41} - \zeta_{60}^{20} q^{45} + \zeta_{60}^{6} q^{49} + \zeta_{60} q^{50} + \zeta_{60}^{27} q^{52} + (\zeta_{60}^{14} + \zeta_{60}^{4}) q^{53} + ( - \zeta_{60}^{22} + \zeta_{60}^{2}) q^{58} - \zeta_{60}^{24} q^{64} + \zeta_{60}^{5} q^{65} - \zeta_{60}^{9} q^{68} + \zeta_{60}^{21} q^{72} - \zeta_{60}^{3} q^{73} + ( - \zeta_{60}^{17} - \zeta_{60}^{7}) q^{74} - \zeta_{60}^{2} q^{80} - \zeta_{60}^{18} q^{81} + (\zeta_{60}^{26} + \zeta_{60}^{16}) q^{82} + \zeta_{60}^{17} q^{85} - q^{89} - \zeta_{60}^{29} q^{90} + ( - \zeta_{60}^{14} - \zeta_{60}^{4}) q^{97} + \zeta_{60}^{15} q^{98} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 16 q + 4 q^{4} + 2 q^{5} + 4 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 16 q + 4 q^{4} + 2 q^{5} + 4 q^{9} - 4 q^{16} - 2 q^{20} + 2 q^{25} + 4 q^{26} - 16 q^{34} - 4 q^{36} + 8 q^{45} + 4 q^{49} + 4 q^{64} + 2 q^{80} - 4 q^{81} - 16 q^{89}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2420\mathbb{Z}\right)^\times\).

\(n\) \(1211\) \(1937\) \(2301\)
\(\chi(n)\) \(-1\) \(-1\) \(-\zeta_{60}^{18}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1219.1
−0.743145 0.669131i
−0.207912 + 0.978148i
0.743145 + 0.669131i
0.207912 0.978148i
−0.743145 + 0.669131i
−0.207912 0.978148i
0.743145 0.669131i
0.207912 + 0.978148i
0.406737 + 0.913545i
−0.994522 0.104528i
−0.406737 0.913545i
0.994522 + 0.104528i
0.406737 0.913545i
−0.994522 + 0.104528i
−0.406737 + 0.913545i
0.994522 0.104528i
−0.951057 0.309017i 0 0.809017 + 0.587785i −0.978148 0.207912i 0 0 −0.587785 0.809017i −0.309017 + 0.951057i 0.866025 + 0.500000i
1219.2 −0.951057 0.309017i 0 0.809017 + 0.587785i 0.669131 0.743145i 0 0 −0.587785 0.809017i −0.309017 + 0.951057i −0.866025 + 0.500000i
1219.3 0.951057 + 0.309017i 0 0.809017 + 0.587785i −0.978148 0.207912i 0 0 0.587785 + 0.809017i −0.309017 + 0.951057i −0.866025 0.500000i
1219.4 0.951057 + 0.309017i 0 0.809017 + 0.587785i 0.669131 0.743145i 0 0 0.587785 + 0.809017i −0.309017 + 0.951057i 0.866025 0.500000i
1479.1 −0.951057 + 0.309017i 0 0.809017 0.587785i −0.978148 + 0.207912i 0 0 −0.587785 + 0.809017i −0.309017 0.951057i 0.866025 0.500000i
1479.2 −0.951057 + 0.309017i 0 0.809017 0.587785i 0.669131 + 0.743145i 0 0 −0.587785 + 0.809017i −0.309017 0.951057i −0.866025 0.500000i
1479.3 0.951057 0.309017i 0 0.809017 0.587785i −0.978148 + 0.207912i 0 0 0.587785 0.809017i −0.309017 0.951057i −0.866025 + 0.500000i
1479.4 0.951057 0.309017i 0 0.809017 0.587785i 0.669131 + 0.743145i 0 0 0.587785 0.809017i −0.309017 0.951057i 0.866025 + 0.500000i
1939.1 −0.587785 0.809017i 0 −0.309017 + 0.951057i −0.104528 + 0.994522i 0 0 0.951057 0.309017i 0.809017 0.587785i 0.866025 0.500000i
1939.2 −0.587785 0.809017i 0 −0.309017 + 0.951057i 0.913545 0.406737i 0 0 0.951057 0.309017i 0.809017 0.587785i −0.866025 0.500000i
1939.3 0.587785 + 0.809017i 0 −0.309017 + 0.951057i −0.104528 + 0.994522i 0 0 −0.951057 + 0.309017i 0.809017 0.587785i −0.866025 + 0.500000i
1939.4 0.587785 + 0.809017i 0 −0.309017 + 0.951057i 0.913545 0.406737i 0 0 −0.951057 + 0.309017i 0.809017 0.587785i 0.866025 + 0.500000i
2259.1 −0.587785 + 0.809017i 0 −0.309017 0.951057i −0.104528 0.994522i 0 0 0.951057 + 0.309017i 0.809017 + 0.587785i 0.866025 + 0.500000i
2259.2 −0.587785 + 0.809017i 0 −0.309017 0.951057i 0.913545 + 0.406737i 0 0 0.951057 + 0.309017i 0.809017 + 0.587785i −0.866025 + 0.500000i
2259.3 0.587785 0.809017i 0 −0.309017 0.951057i −0.104528 0.994522i 0 0 −0.951057 0.309017i 0.809017 + 0.587785i −0.866025 0.500000i
2259.4 0.587785 0.809017i 0 −0.309017 0.951057i 0.913545 + 0.406737i 0 0 −0.951057 0.309017i 0.809017 + 0.587785i 0.866025 0.500000i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 1219.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 CM by \(\Q(\sqrt{-1}) \)
5.b even 2 1 inner
11.b odd 2 1 inner
11.c even 5 3 inner
11.d odd 10 3 inner
20.d odd 2 1 inner
44.c even 2 1 inner
44.g even 10 3 inner
44.h odd 10 3 inner
55.d odd 2 1 inner
55.h odd 10 3 inner
55.j even 10 3 inner
220.g even 2 1 inner
220.n odd 10 3 inner
220.o even 10 3 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2420.1.n.j 16
4.b odd 2 1 CM 2420.1.n.j 16
5.b even 2 1 inner 2420.1.n.j 16
11.b odd 2 1 inner 2420.1.n.j 16
11.c even 5 1 2420.1.h.j 4
11.c even 5 3 inner 2420.1.n.j 16
11.d odd 10 1 2420.1.h.j 4
11.d odd 10 3 inner 2420.1.n.j 16
20.d odd 2 1 inner 2420.1.n.j 16
44.c even 2 1 inner 2420.1.n.j 16
44.g even 10 1 2420.1.h.j 4
44.g even 10 3 inner 2420.1.n.j 16
44.h odd 10 1 2420.1.h.j 4
44.h odd 10 3 inner 2420.1.n.j 16
55.d odd 2 1 inner 2420.1.n.j 16
55.h odd 10 1 2420.1.h.j 4
55.h odd 10 3 inner 2420.1.n.j 16
55.j even 10 1 2420.1.h.j 4
55.j even 10 3 inner 2420.1.n.j 16
220.g even 2 1 inner 2420.1.n.j 16
220.n odd 10 1 2420.1.h.j 4
220.n odd 10 3 inner 2420.1.n.j 16
220.o even 10 1 2420.1.h.j 4
220.o even 10 3 inner 2420.1.n.j 16
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
2420.1.h.j 4 11.c even 5 1
2420.1.h.j 4 11.d odd 10 1
2420.1.h.j 4 44.g even 10 1
2420.1.h.j 4 44.h odd 10 1
2420.1.h.j 4 55.h odd 10 1
2420.1.h.j 4 55.j even 10 1
2420.1.h.j 4 220.n odd 10 1
2420.1.h.j 4 220.o even 10 1
2420.1.n.j 16 1.a even 1 1 trivial
2420.1.n.j 16 4.b odd 2 1 CM
2420.1.n.j 16 5.b even 2 1 inner
2420.1.n.j 16 11.b odd 2 1 inner
2420.1.n.j 16 11.c even 5 3 inner
2420.1.n.j 16 11.d odd 10 3 inner
2420.1.n.j 16 20.d odd 2 1 inner
2420.1.n.j 16 44.c even 2 1 inner
2420.1.n.j 16 44.g even 10 3 inner
2420.1.n.j 16 44.h odd 10 3 inner
2420.1.n.j 16 55.d odd 2 1 inner
2420.1.n.j 16 55.h odd 10 3 inner
2420.1.n.j 16 55.j even 10 3 inner
2420.1.n.j 16 220.g even 2 1 inner
2420.1.n.j 16 220.n odd 10 3 inner
2420.1.n.j 16 220.o even 10 3 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{1}^{\mathrm{new}}(2420, [\chi])\):

\( T_{3} \) Copy content Toggle raw display
\( T_{7} \) Copy content Toggle raw display
\( T_{13}^{8} - T_{13}^{6} + T_{13}^{4} - T_{13}^{2} + 1 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{8} - T^{6} + T^{4} + \cdots + 1)^{2} \) Copy content Toggle raw display
$3$ \( T^{16} \) Copy content Toggle raw display
$5$ \( (T^{8} - T^{7} + T^{5} + \cdots + 1)^{2} \) Copy content Toggle raw display
$7$ \( T^{16} \) Copy content Toggle raw display
$11$ \( T^{16} \) Copy content Toggle raw display
$13$ \( (T^{8} - T^{6} + T^{4} + \cdots + 1)^{2} \) Copy content Toggle raw display
$17$ \( (T^{8} - T^{6} + T^{4} + \cdots + 1)^{2} \) Copy content Toggle raw display
$19$ \( T^{16} \) Copy content Toggle raw display
$23$ \( T^{16} \) Copy content Toggle raw display
$29$ \( (T^{8} + 3 T^{6} + 9 T^{4} + \cdots + 81)^{2} \) Copy content Toggle raw display
$31$ \( T^{16} \) Copy content Toggle raw display
$37$ \( (T^{8} - 3 T^{6} + 9 T^{4} + \cdots + 81)^{2} \) Copy content Toggle raw display
$41$ \( (T^{8} + 3 T^{6} + 9 T^{4} + \cdots + 81)^{2} \) Copy content Toggle raw display
$43$ \( T^{16} \) Copy content Toggle raw display
$47$ \( T^{16} \) Copy content Toggle raw display
$53$ \( (T^{8} - 3 T^{6} + 9 T^{4} + \cdots + 81)^{2} \) Copy content Toggle raw display
$59$ \( T^{16} \) Copy content Toggle raw display
$61$ \( T^{16} \) Copy content Toggle raw display
$67$ \( T^{16} \) Copy content Toggle raw display
$71$ \( T^{16} \) Copy content Toggle raw display
$73$ \( (T^{8} - 4 T^{6} + \cdots + 256)^{2} \) Copy content Toggle raw display
$79$ \( T^{16} \) Copy content Toggle raw display
$83$ \( T^{16} \) Copy content Toggle raw display
$89$ \( (T + 1)^{16} \) Copy content Toggle raw display
$97$ \( (T^{8} - 3 T^{6} + 9 T^{4} + \cdots + 81)^{2} \) Copy content Toggle raw display
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