Properties

Label 1764.4.k.p
Level $1764$
Weight $4$
Character orbit 1764.k
Analytic conductor $104.079$
Analytic rank $0$
Dimension $2$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1764,4,Mod(361,1764)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1764, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([0, 0, 4]))
 
N = Newforms(chi, 4, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1764.361");
 
S:= CuspForms(chi, 4);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1764 = 2^{2} \cdot 3^{2} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 1764.k (of order \(3\), degree \(2\), 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: \(104.079369250\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{-3}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{25}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 196)
Sato-Tate group: $\mathrm{SU}(2)[C_{3}]$

$q$-expansion

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

Coefficients of the \(q\)-expansion are expressed in terms of a primitive root of unity \(\zeta_{6}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + 20 \zeta_{6} q^{5}+O(q^{10}) \) Copy content Toggle raw display \( q + 20 \zeta_{6} q^{5} + ( - 44 \zeta_{6} + 44) q^{11} + 44 q^{13} + (72 \zeta_{6} - 72) q^{17} + 100 \zeta_{6} q^{19} - 120 \zeta_{6} q^{23} + (275 \zeta_{6} - 275) q^{25} - 218 q^{29} + (280 \zeta_{6} - 280) q^{31} + 30 \zeta_{6} q^{37} + 120 q^{41} + 220 q^{43} - 88 \zeta_{6} q^{47} + ( - 110 \zeta_{6} + 110) q^{53} + 880 q^{55} + (580 \zeta_{6} - 580) q^{59} + 380 \zeta_{6} q^{61} + 880 \zeta_{6} q^{65} + ( - 980 \zeta_{6} + 980) q^{67} + 112 q^{71} + (640 \zeta_{6} - 640) q^{73} + 488 \zeta_{6} q^{79} + 660 q^{83} - 1440 q^{85} - 320 \zeta_{6} q^{89} + (2000 \zeta_{6} - 2000) q^{95} - 248 q^{97} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q + 20 q^{5}+O(q^{10}) \) Copy content Toggle raw display \( 2 q + 20 q^{5} + 44 q^{11} + 88 q^{13} - 72 q^{17} + 100 q^{19} - 120 q^{23} - 275 q^{25} - 436 q^{29} - 280 q^{31} + 30 q^{37} + 240 q^{41} + 440 q^{43} - 88 q^{47} + 110 q^{53} + 1760 q^{55} - 580 q^{59} + 380 q^{61} + 880 q^{65} + 980 q^{67} + 224 q^{71} - 640 q^{73} + 488 q^{79} + 1320 q^{83} - 2880 q^{85} - 320 q^{89} - 2000 q^{95} - 496 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1764\mathbb{Z}\right)^\times\).

\(n\) \(785\) \(883\) \(1081\)
\(\chi(n)\) \(1\) \(1\) \(-\zeta_{6}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
361.1
0.500000 + 0.866025i
0.500000 0.866025i
0 0 0 10.0000 + 17.3205i 0 0 0 0 0
1549.1 0 0 0 10.0000 17.3205i 0 0 0 0 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
7.c even 3 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1764.4.k.p 2
3.b odd 2 1 196.4.e.b 2
7.b odd 2 1 1764.4.k.a 2
7.c even 3 1 1764.4.a.a 1
7.c even 3 1 inner 1764.4.k.p 2
7.d odd 6 1 1764.4.a.m 1
7.d odd 6 1 1764.4.k.a 2
21.c even 2 1 196.4.e.e 2
21.g even 6 1 196.4.a.a 1
21.g even 6 1 196.4.e.e 2
21.h odd 6 1 196.4.a.c yes 1
21.h odd 6 1 196.4.e.b 2
84.j odd 6 1 784.4.a.m 1
84.n even 6 1 784.4.a.f 1
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
196.4.a.a 1 21.g even 6 1
196.4.a.c yes 1 21.h odd 6 1
196.4.e.b 2 3.b odd 2 1
196.4.e.b 2 21.h odd 6 1
196.4.e.e 2 21.c even 2 1
196.4.e.e 2 21.g even 6 1
784.4.a.f 1 84.n even 6 1
784.4.a.m 1 84.j odd 6 1
1764.4.a.a 1 7.c even 3 1
1764.4.a.m 1 7.d odd 6 1
1764.4.k.a 2 7.b odd 2 1
1764.4.k.a 2 7.d odd 6 1
1764.4.k.p 2 1.a even 1 1 trivial
1764.4.k.p 2 7.c even 3 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(1764, [\chi])\):

\( T_{5}^{2} - 20T_{5} + 400 \) Copy content Toggle raw display
\( T_{11}^{2} - 44T_{11} + 1936 \) Copy content Toggle raw display
\( T_{13} - 44 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( T^{2} - 20T + 400 \) Copy content Toggle raw display
$7$ \( T^{2} \) Copy content Toggle raw display
$11$ \( T^{2} - 44T + 1936 \) Copy content Toggle raw display
$13$ \( (T - 44)^{2} \) Copy content Toggle raw display
$17$ \( T^{2} + 72T + 5184 \) Copy content Toggle raw display
$19$ \( T^{2} - 100T + 10000 \) Copy content Toggle raw display
$23$ \( T^{2} + 120T + 14400 \) Copy content Toggle raw display
$29$ \( (T + 218)^{2} \) Copy content Toggle raw display
$31$ \( T^{2} + 280T + 78400 \) Copy content Toggle raw display
$37$ \( T^{2} - 30T + 900 \) Copy content Toggle raw display
$41$ \( (T - 120)^{2} \) Copy content Toggle raw display
$43$ \( (T - 220)^{2} \) Copy content Toggle raw display
$47$ \( T^{2} + 88T + 7744 \) Copy content Toggle raw display
$53$ \( T^{2} - 110T + 12100 \) Copy content Toggle raw display
$59$ \( T^{2} + 580T + 336400 \) Copy content Toggle raw display
$61$ \( T^{2} - 380T + 144400 \) Copy content Toggle raw display
$67$ \( T^{2} - 980T + 960400 \) Copy content Toggle raw display
$71$ \( (T - 112)^{2} \) Copy content Toggle raw display
$73$ \( T^{2} + 640T + 409600 \) Copy content Toggle raw display
$79$ \( T^{2} - 488T + 238144 \) Copy content Toggle raw display
$83$ \( (T - 660)^{2} \) Copy content Toggle raw display
$89$ \( T^{2} + 320T + 102400 \) Copy content Toggle raw display
$97$ \( (T + 248)^{2} \) Copy content Toggle raw display
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