Properties

Label 216.2.n.a
Level $216$
Weight $2$
Character orbit 216.n
Analytic conductor $1.725$
Analytic rank $0$
Dimension $4$
CM no
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [216,2,Mod(37,216)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(216, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([0, 3, 2]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("216.37");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 216 = 2^{3} \cdot 3^{3} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 216.n (of order \(6\), 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: \(1.72476868366\)
Analytic rank: \(0\)
Dimension: \(4\)
Relative dimension: \(2\) over \(\Q(\zeta_{6})\)
Coefficient field: \(\Q(\zeta_{12})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{11}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 72)
Sato-Tate group: $\mathrm{SU}(2)[C_{6}]$

$q$-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 \(\zeta_{12}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + ( - \zeta_{12}^{3} + \zeta_{12}^{2} + \zeta_{12}) q^{2} + 2 \zeta_{12} q^{4} + 2 \zeta_{12} q^{5} - 4 \zeta_{12}^{2} q^{7} + (2 \zeta_{12}^{3} + 2) q^{8} +O(q^{10}) \) Copy content Toggle raw display \( q + ( - \zeta_{12}^{3} + \zeta_{12}^{2} + \zeta_{12}) q^{2} + 2 \zeta_{12} q^{4} + 2 \zeta_{12} q^{5} - 4 \zeta_{12}^{2} q^{7} + (2 \zeta_{12}^{3} + 2) q^{8} + (2 \zeta_{12}^{3} + 2) q^{10} + (3 \zeta_{12}^{3} - 3 \zeta_{12}) q^{11} + 2 \zeta_{12} q^{13} + ( - 4 \zeta_{12}^{2} - 4 \zeta_{12} + 4) q^{14} + 4 \zeta_{12}^{2} q^{16} - 5 q^{17} - \zeta_{12}^{3} q^{19} + 4 \zeta_{12}^{2} q^{20} + (3 \zeta_{12}^{2} - 3 \zeta_{12} - 3) q^{22} + ( - 2 \zeta_{12}^{2} + 2) q^{23} - \zeta_{12}^{2} q^{25} + (2 \zeta_{12}^{3} + 2) q^{26} - 8 \zeta_{12}^{3} q^{28} + ( - 4 \zeta_{12}^{2} + 4) q^{31} + (4 \zeta_{12}^{2} + 4 \zeta_{12} - 4) q^{32} + (5 \zeta_{12}^{3} - 5 \zeta_{12}^{2} - 5 \zeta_{12}) q^{34} - 8 \zeta_{12}^{3} q^{35} - 2 \zeta_{12}^{3} q^{37} + ( - \zeta_{12}^{3} - \zeta_{12}^{2} + \zeta_{12}) q^{38} + (4 \zeta_{12}^{2} + 4 \zeta_{12} - 4) q^{40} + (5 \zeta_{12}^{2} - 5) q^{41} + (11 \zeta_{12}^{3} - 11 \zeta_{12}) q^{43} - 6 q^{44} + ( - 2 \zeta_{12}^{3} + 2) q^{46} - 6 \zeta_{12}^{2} q^{47} + (9 \zeta_{12}^{2} - 9) q^{49} + ( - \zeta_{12}^{2} - \zeta_{12} + 1) q^{50} + 4 \zeta_{12}^{2} q^{52} - 6 q^{55} + ( - 8 \zeta_{12}^{3} - 8 \zeta_{12}^{2} + 8 \zeta_{12}) q^{56} + \zeta_{12} q^{59} + ( - 12 \zeta_{12}^{3} + 12 \zeta_{12}) q^{61} + ( - 4 \zeta_{12}^{3} + 4) q^{62} + 8 \zeta_{12}^{3} q^{64} + 4 \zeta_{12}^{2} q^{65} + 3 \zeta_{12} q^{67} - 10 \zeta_{12} q^{68} + ( - 8 \zeta_{12}^{3} - 8 \zeta_{12}^{2} + 8 \zeta_{12}) q^{70} + 6 q^{71} + 9 q^{73} + ( - 2 \zeta_{12}^{3} - 2 \zeta_{12}^{2} + 2 \zeta_{12}) q^{74} + ( - 2 \zeta_{12}^{2} + 2) q^{76} + 12 \zeta_{12} q^{77} + 14 \zeta_{12}^{2} q^{79} + 8 \zeta_{12}^{3} q^{80} + (5 \zeta_{12}^{3} - 5) q^{82} + (4 \zeta_{12}^{3} - 4 \zeta_{12}) q^{83} - 10 \zeta_{12} q^{85} + (11 \zeta_{12}^{2} - 11 \zeta_{12} - 11) q^{86} + (6 \zeta_{12}^{3} - 6 \zeta_{12}^{2} - 6 \zeta_{12}) q^{88} + 14 q^{89} - 8 \zeta_{12}^{3} q^{91} + ( - 4 \zeta_{12}^{3} + 4 \zeta_{12}) q^{92} + ( - 6 \zeta_{12}^{2} - 6 \zeta_{12} + 6) q^{94} + ( - 2 \zeta_{12}^{2} + 2) q^{95} - \zeta_{12}^{2} q^{97} + (9 \zeta_{12}^{3} - 9) q^{98} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 2 q^{2} - 8 q^{7} + 8 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( 4 q + 2 q^{2} - 8 q^{7} + 8 q^{8} + 8 q^{10} + 8 q^{14} + 8 q^{16} - 20 q^{17} + 8 q^{20} - 6 q^{22} + 4 q^{23} - 2 q^{25} + 8 q^{26} + 8 q^{31} - 8 q^{32} - 10 q^{34} - 2 q^{38} - 8 q^{40} - 10 q^{41} - 24 q^{44} + 8 q^{46} - 12 q^{47} - 18 q^{49} + 2 q^{50} + 8 q^{52} - 24 q^{55} - 16 q^{56} + 16 q^{62} + 8 q^{65} - 16 q^{70} + 24 q^{71} + 36 q^{73} - 4 q^{74} + 4 q^{76} + 28 q^{79} - 20 q^{82} - 22 q^{86} - 12 q^{88} + 56 q^{89} + 12 q^{94} + 4 q^{95} - 2 q^{97} - 36 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/216\mathbb{Z}\right)^\times\).

\(n\) \(55\) \(109\) \(137\)
\(\chi(n)\) \(1\) \(-1\) \(-1 + \zeta_{12}^{2}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
37.1
−0.866025 0.500000i
0.866025 + 0.500000i
−0.866025 + 0.500000i
0.866025 0.500000i
−0.366025 + 1.36603i 0 −1.73205 1.00000i −1.73205 1.00000i 0 −2.00000 3.46410i 2.00000 2.00000i 0 2.00000 2.00000i
37.2 1.36603 + 0.366025i 0 1.73205 + 1.00000i 1.73205 + 1.00000i 0 −2.00000 3.46410i 2.00000 + 2.00000i 0 2.00000 + 2.00000i
181.1 −0.366025 1.36603i 0 −1.73205 + 1.00000i −1.73205 + 1.00000i 0 −2.00000 + 3.46410i 2.00000 + 2.00000i 0 2.00000 + 2.00000i
181.2 1.36603 0.366025i 0 1.73205 1.00000i 1.73205 1.00000i 0 −2.00000 + 3.46410i 2.00000 2.00000i 0 2.00000 2.00000i
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
8.b even 2 1 inner
9.c even 3 1 inner
72.n even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 216.2.n.a 4
3.b odd 2 1 72.2.n.a 4
4.b odd 2 1 864.2.r.a 4
8.b even 2 1 inner 216.2.n.a 4
8.d odd 2 1 864.2.r.a 4
9.c even 3 1 inner 216.2.n.a 4
9.c even 3 1 648.2.d.a 2
9.d odd 6 1 72.2.n.a 4
9.d odd 6 1 648.2.d.d 2
12.b even 2 1 288.2.r.a 4
24.f even 2 1 288.2.r.a 4
24.h odd 2 1 72.2.n.a 4
36.f odd 6 1 864.2.r.a 4
36.f odd 6 1 2592.2.d.a 2
36.h even 6 1 288.2.r.a 4
36.h even 6 1 2592.2.d.b 2
72.j odd 6 1 72.2.n.a 4
72.j odd 6 1 648.2.d.d 2
72.l even 6 1 288.2.r.a 4
72.l even 6 1 2592.2.d.b 2
72.n even 6 1 inner 216.2.n.a 4
72.n even 6 1 648.2.d.a 2
72.p odd 6 1 864.2.r.a 4
72.p odd 6 1 2592.2.d.a 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
72.2.n.a 4 3.b odd 2 1
72.2.n.a 4 9.d odd 6 1
72.2.n.a 4 24.h odd 2 1
72.2.n.a 4 72.j odd 6 1
216.2.n.a 4 1.a even 1 1 trivial
216.2.n.a 4 8.b even 2 1 inner
216.2.n.a 4 9.c even 3 1 inner
216.2.n.a 4 72.n even 6 1 inner
288.2.r.a 4 12.b even 2 1
288.2.r.a 4 24.f even 2 1
288.2.r.a 4 36.h even 6 1
288.2.r.a 4 72.l even 6 1
648.2.d.a 2 9.c even 3 1
648.2.d.a 2 72.n even 6 1
648.2.d.d 2 9.d odd 6 1
648.2.d.d 2 72.j odd 6 1
864.2.r.a 4 4.b odd 2 1
864.2.r.a 4 8.d odd 2 1
864.2.r.a 4 36.f odd 6 1
864.2.r.a 4 72.p odd 6 1
2592.2.d.a 2 36.f odd 6 1
2592.2.d.a 2 72.p odd 6 1
2592.2.d.b 2 36.h even 6 1
2592.2.d.b 2 72.l even 6 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{4} - 4T_{5}^{2} + 16 \) acting on \(S_{2}^{\mathrm{new}}(216, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} - 2 T^{3} + 2 T^{2} - 4 T + 4 \) Copy content Toggle raw display
$3$ \( T^{4} \) Copy content Toggle raw display
$5$ \( T^{4} - 4T^{2} + 16 \) Copy content Toggle raw display
$7$ \( (T^{2} + 4 T + 16)^{2} \) Copy content Toggle raw display
$11$ \( T^{4} - 9T^{2} + 81 \) Copy content Toggle raw display
$13$ \( T^{4} - 4T^{2} + 16 \) Copy content Toggle raw display
$17$ \( (T + 5)^{4} \) Copy content Toggle raw display
$19$ \( (T^{2} + 1)^{2} \) Copy content Toggle raw display
$23$ \( (T^{2} - 2 T + 4)^{2} \) Copy content Toggle raw display
$29$ \( T^{4} \) Copy content Toggle raw display
$31$ \( (T^{2} - 4 T + 16)^{2} \) Copy content Toggle raw display
$37$ \( (T^{2} + 4)^{2} \) Copy content Toggle raw display
$41$ \( (T^{2} + 5 T + 25)^{2} \) Copy content Toggle raw display
$43$ \( T^{4} - 121 T^{2} + 14641 \) Copy content Toggle raw display
$47$ \( (T^{2} + 6 T + 36)^{2} \) Copy content Toggle raw display
$53$ \( T^{4} \) Copy content Toggle raw display
$59$ \( T^{4} - T^{2} + 1 \) Copy content Toggle raw display
$61$ \( T^{4} - 144 T^{2} + 20736 \) Copy content Toggle raw display
$67$ \( T^{4} - 9T^{2} + 81 \) Copy content Toggle raw display
$71$ \( (T - 6)^{4} \) Copy content Toggle raw display
$73$ \( (T - 9)^{4} \) Copy content Toggle raw display
$79$ \( (T^{2} - 14 T + 196)^{2} \) Copy content Toggle raw display
$83$ \( T^{4} - 16T^{2} + 256 \) Copy content Toggle raw display
$89$ \( (T - 14)^{4} \) Copy content Toggle raw display
$97$ \( (T^{2} + T + 1)^{2} \) Copy content Toggle raw display
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