Properties

Label 495.2.bf.b
Level $495$
Weight $2$
Character orbit 495.bf
Analytic conductor $3.953$
Analytic rank $0$
Dimension $8$
CM discriminant -11
Inner twists $4$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [495,2,Mod(43,495)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(495, base_ring=CyclotomicField(12))
 
chi = DirichletCharacter(H, H._module([8, 9, 6]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("495.43");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 495 = 3^{2} \cdot 5 \cdot 11 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 495.bf (of order \(12\), 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: \(3.95259490005\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(2\) over \(\Q(\zeta_{12})\)
Coefficient field: 8.0.303595776.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 5x^{6} + 16x^{4} + 45x^{2} + 81 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{12}]$

$q$-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 basis \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_{2} q^{3} - 2 \beta_{5} q^{4} + ( - \beta_{7} + \beta_{3}) q^{5} + (\beta_{6} + 3 \beta_{4} - \beta_{2} + 3) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_{2} q^{3} - 2 \beta_{5} q^{4} + ( - \beta_{7} + \beta_{3}) q^{5} + (\beta_{6} + 3 \beta_{4} - \beta_{2} + 3) q^{9} + ( - 2 \beta_{7} - \beta_{3}) q^{11} + (2 \beta_{7} + 2 \beta_{3}) q^{12} + (\beta_{7} + 4 \beta_{5} + \cdots - \beta_1) q^{15}+ \cdots + (8 \beta_{5} - 5 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 2 q^{3} + 10 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 2 q^{3} + 10 q^{9} + 16 q^{16} + 24 q^{20} - 18 q^{23} - 2 q^{25} + 32 q^{27} + 14 q^{37} + 24 q^{47} + 16 q^{48} + 12 q^{53} - 22 q^{55} - 90 q^{59} + 28 q^{60} - 26 q^{67} + 20 q^{69} + 12 q^{71} - 32 q^{75} - 14 q^{81} - 36 q^{92} - 68 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 5x^{6} + 16x^{4} + 45x^{2} + 81 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{6} + 32\nu^{4} + 16\nu^{2} + 45 ) / 144 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{7} + 32\nu^{5} + 16\nu^{3} + 45\nu ) / 432 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -5\nu^{6} - 16\nu^{4} - 80\nu^{2} - 225 ) / 144 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( \nu^{7} + 13\nu ) / 48 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -\nu^{6} - 13 ) / 16 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 5\nu^{7} + 16\nu^{5} + 80\nu^{3} + 225\nu ) / 144 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{6} - 2\beta_{4} - \beta_{2} - 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( 2\beta_{7} - 3\beta_{5} - 3\beta_{3} - 2\beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{4} + 5\beta_{2} \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( -\beta_{7} + 15\beta_{3} \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( -16\beta_{6} - 13 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( 48\beta_{5} - 13\beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/495\mathbb{Z}\right)^\times\).

\(n\) \(46\) \(56\) \(397\)
\(\chi(n)\) \(-1\) \(\beta_{4}\) \(\beta_{3} + \beta_{5}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
43.1
−0.396143 1.68614i
1.26217 + 1.18614i
0.396143 + 1.68614i
−1.26217 1.18614i
0.396143 1.68614i
−1.26217 + 1.18614i
−0.396143 + 1.68614i
1.26217 1.18614i
0 −1.18614 + 1.26217i −1.73205 + 1.00000i −2.12819 + 0.686141i 0 0 0 −0.186141 2.99422i 0
43.2 0 1.68614 0.396143i −1.73205 + 1.00000i −0.469882 2.18614i 0 0 0 2.68614 1.33591i 0
142.1 0 −1.18614 + 1.26217i 1.73205 1.00000i 2.12819 0.686141i 0 0 0 −0.186141 2.99422i 0
142.2 0 1.68614 0.396143i 1.73205 1.00000i 0.469882 + 2.18614i 0 0 0 2.68614 1.33591i 0
373.1 0 −1.18614 1.26217i 1.73205 + 1.00000i 2.12819 + 0.686141i 0 0 0 −0.186141 + 2.99422i 0
373.2 0 1.68614 + 0.396143i 1.73205 + 1.00000i 0.469882 2.18614i 0 0 0 2.68614 + 1.33591i 0
472.1 0 −1.18614 1.26217i −1.73205 1.00000i −2.12819 0.686141i 0 0 0 −0.186141 + 2.99422i 0
472.2 0 1.68614 + 0.396143i −1.73205 1.00000i −0.469882 + 2.18614i 0 0 0 2.68614 + 1.33591i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 43.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
11.b odd 2 1 CM by \(\Q(\sqrt{-11}) \)
45.k odd 12 1 inner
495.bf even 12 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 495.2.bf.b yes 8
5.c odd 4 1 495.2.bf.a 8
9.c even 3 1 495.2.bf.a 8
11.b odd 2 1 CM 495.2.bf.b yes 8
45.k odd 12 1 inner 495.2.bf.b yes 8
55.e even 4 1 495.2.bf.a 8
99.h odd 6 1 495.2.bf.a 8
495.bf even 12 1 inner 495.2.bf.b yes 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
495.2.bf.a 8 5.c odd 4 1
495.2.bf.a 8 9.c even 3 1
495.2.bf.a 8 55.e even 4 1
495.2.bf.a 8 99.h odd 6 1
495.2.bf.b yes 8 1.a even 1 1 trivial
495.2.bf.b yes 8 11.b odd 2 1 CM
495.2.bf.b yes 8 45.k odd 12 1 inner
495.2.bf.b yes 8 495.bf even 12 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(495, [\chi])\):

\( T_{2} \) Copy content Toggle raw display
\( T_{47}^{8} - 24 T_{47}^{7} + 438 T_{47}^{6} - 4728 T_{47}^{5} + 27755 T_{47}^{4} - 77352 T_{47}^{3} + \cdots + 17032129 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( (T^{4} - T^{3} - 2 T^{2} + \cdots + 9)^{2} \) Copy content Toggle raw display
$5$ \( T^{8} + T^{6} + \cdots + 625 \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( (T^{4} + 11 T^{2} + 121)^{2} \) Copy content Toggle raw display
$13$ \( T^{8} \) Copy content Toggle raw display
$17$ \( T^{8} \) Copy content Toggle raw display
$19$ \( T^{8} \) Copy content Toggle raw display
$23$ \( T^{8} + 18 T^{7} + \cdots + 1500625 \) Copy content Toggle raw display
$29$ \( T^{8} \) Copy content Toggle raw display
$31$ \( T^{8} + 87 T^{6} + \cdots + 1296 \) Copy content Toggle raw display
$37$ \( T^{8} - 14 T^{7} + \cdots + 12124324 \) Copy content Toggle raw display
$41$ \( T^{8} \) Copy content Toggle raw display
$43$ \( T^{8} \) Copy content Toggle raw display
$47$ \( T^{8} - 24 T^{7} + \cdots + 17032129 \) Copy content Toggle raw display
$53$ \( T^{8} - 12 T^{7} + \cdots + 12439729 \) Copy content Toggle raw display
$59$ \( (T^{4} + 45 T^{3} + \cdots + 27556)^{2} \) Copy content Toggle raw display
$61$ \( T^{8} \) Copy content Toggle raw display
$67$ \( T^{8} + 26 T^{7} + \cdots + 149866564 \) Copy content Toggle raw display
$71$ \( (T^{2} - 3 T - 204)^{4} \) Copy content Toggle raw display
$73$ \( T^{8} \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( T^{8} \) Copy content Toggle raw display
$89$ \( (T^{2} + 81)^{4} \) Copy content Toggle raw display
$97$ \( T^{8} + 68 T^{7} + \cdots + 368716804 \) Copy content Toggle raw display
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