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Properties

Label 448.2.q.a
Level $448$
Weight $2$
Character orbit 448.q
Analytic conductor $3.577$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [448,2,Mod(31,448)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(448, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([3, 3, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("448.31");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 448 = 2^{6} \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 448.q (of order \(6\), degree \(2\), 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: \(3.57729801055\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{6})\)
Coefficient field: 8.0.12960000.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - 3x^{6} + 8x^{4} - 3x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{4} \)
Twist minimal: yes
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 basis \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (\beta_{7} - \beta_{2}) q^{3} + \beta_{6} q^{5} + ( - \beta_{5} + 2 \beta_1) q^{7} - 2 \beta_{4} q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + (\beta_{7} - \beta_{2}) q^{3} + \beta_{6} q^{5} + ( - \beta_{5} + 2 \beta_1) q^{7} - 2 \beta_{4} q^{9} + ( - \beta_{7} - \beta_{2}) q^{11} - 5 \beta_{5} q^{15} + ( - 3 \beta_{4} + 3) q^{17} + 3 \beta_{2} q^{19} + (\beta_{6} - 3 \beta_{3}) q^{21} + 3 \beta_1 q^{23} - \beta_{7} q^{27} + ( - 4 \beta_{6} + 2 \beta_{3}) q^{29} + ( - \beta_{5} + \beta_1) q^{31} + (5 \beta_{4} + 10) q^{33} + ( - 2 \beta_{7} + 3 \beta_{2}) q^{35} + ( - 3 \beta_{6} + 6 \beta_{3}) q^{37} + ( - 12 \beta_{4} - 6) q^{41} + (2 \beta_{6} - 2 \beta_{3}) q^{45} + (6 \beta_{5} + 3 \beta_1) q^{47} + (8 \beta_{4} + 3) q^{49} + (6 \beta_{7} - 3 \beta_{2}) q^{51} + ( - \beta_{6} - \beta_{3}) q^{53} + ( - 5 \beta_{5} - 10 \beta_1) q^{55} - 15 q^{57} + (\beta_{7} - \beta_{2}) q^{59} + 3 \beta_{6} q^{61} + (4 \beta_{5} + 6 \beta_1) q^{63} + ( - 3 \beta_{7} - 3 \beta_{2}) q^{67} - 3 \beta_{3} q^{69} - 6 \beta_{5} q^{71} + (3 \beta_{4} - 3) q^{73} + (5 \beta_{6} - \beta_{3}) q^{77} - 13 \beta_1 q^{79} + (11 \beta_{4} + 11) q^{81} - 2 \beta_{7} q^{83} + (6 \beta_{6} - 3 \beta_{3}) q^{85} + (10 \beta_{5} - 10 \beta_1) q^{87} + ( - 3 \beta_{4} - 6) q^{89} + (\beta_{6} - 2 \beta_{3}) q^{93} + (15 \beta_{5} + 15 \beta_1) q^{95} + ( - 4 \beta_{4} - 2) q^{97} + (2 \beta_{7} - 4 \beta_{2}) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 8 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 8 q^{9} + 36 q^{17} + 60 q^{33} - 8 q^{49} - 120 q^{57} - 36 q^{73} + 44 q^{81} - 36 q^{89}+O(q^{100}) \) Copy content Toggle raw display

Display 100 coefficients 10 coefficients

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} - 3x^{6} + 8x^{4} - 3x^{2} + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{7} + 13\nu ) / 8 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{7} + 29\nu ) / 8 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{6} + 9 ) / 4 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 3\nu^{6} - 8\nu^{4} + 24\nu^{2} - 9 ) / 8 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -3\nu^{7} + 8\nu^{5} - 20\nu^{3} + \nu ) / 4 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -7\nu^{6} + 24\nu^{4} - 56\nu^{2} + 21 ) / 8 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 3\nu^{7} - 8\nu^{5} + 22\nu^{3} - \nu ) / 2 \) Copy content Toggle raw display

Display \(\nu^j\) in terms of \(\beta_i\)

\(\nu\)\(=\) \( ( \beta_{2} - \beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{6} + 3\beta_{4} - \beta_{3} + 3 ) / 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{7} + 2\beta_{5} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( 3\beta_{6} + 7\beta_{4} ) / 2 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( 5\beta_{7} + 11\beta_{5} - 5\beta_{2} + 11\beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 4\beta_{3} - 9 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( -13\beta_{2} + 29\beta_1 ) / 2 \) Copy content Toggle raw display

Display \(\beta_i\) in terms of \(\nu^j\)

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/448\mathbb{Z}\right)^\times\).

\(n\) \(127\) \(129\) \(197\)
\(\chi(n)\) \(-1\) \(-\beta_{4}\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
31.1
1.40126 − 0.809017i
0.535233 − 0.309017i
−1.40126 + 0.809017i
−0.535233 + 0.309017i
1.40126 + 0.809017i
0.535233 + 0.309017i
−1.40126 − 0.809017i
−0.535233 − 0.309017i
0 −1.93649 − 1.11803i 0 −1.11803 − 1.93649i 0 −1.73205 + 2.00000i 0 1.00000 + 1.73205i 0
31.2 0 −1.93649 − 1.11803i 0 1.11803 + 1.93649i 0 1.73205 − 2.00000i 0 1.00000 + 1.73205i 0
31.3 0 1.93649 + 1.11803i 0 −1.11803 − 1.93649i 0 1.73205 − 2.00000i 0 1.00000 + 1.73205i 0
31.4 0 1.93649 + 1.11803i 0 1.11803 + 1.93649i 0 −1.73205 + 2.00000i 0 1.00000 + 1.73205i 0
159.1 0 −1.93649 + 1.11803i 0 −1.11803 + 1.93649i 0 −1.73205 − 2.00000i 0 1.00000 − 1.73205i 0
159.2 0 −1.93649 + 1.11803i 0 1.11803 − 1.93649i 0 1.73205 + 2.00000i 0 1.00000 − 1.73205i 0
159.3 0 1.93649 − 1.11803i 0 −1.11803 + 1.93649i 0 1.73205 + 2.00000i 0 1.00000 − 1.73205i 0
159.4 0 1.93649 − 1.11803i 0 1.11803 − 1.93649i 0 −1.73205 − 2.00000i 0 1.00000 − 1.73205i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 31.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 inner
7.d odd 6 1 inner
8.b even 2 1 inner
8.d odd 2 1 inner
28.f even 6 1 inner
56.j odd 6 1 inner
56.m even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 448.2.q.a ✓ 8
4.b odd 2 1 inner 448.2.q.a ✓ 8
7.c even 3 1 3136.2.e.a 8
7.d odd 6 1 inner 448.2.q.a ✓ 8
7.d odd 6 1 3136.2.e.a 8
8.b even 2 1 inner 448.2.q.a ✓ 8
8.d odd 2 1 inner 448.2.q.a ✓ 8
28.f even 6 1 inner 448.2.q.a ✓ 8
28.f even 6 1 3136.2.e.a 8
28.g odd 6 1 3136.2.e.a 8
56.j odd 6 1 inner 448.2.q.a ✓ 8
56.j odd 6 1 3136.2.e.a 8
56.k odd 6 1 3136.2.e.a 8
56.m even 6 1 inner 448.2.q.a ✓ 8
56.m even 6 1 3136.2.e.a 8
56.p even 6 1 3136.2.e.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
448.2.q.a ✓ 8 1.a even 1 1 trivial
448.2.q.a ✓ 8 4.b odd 2 1 inner
448.2.q.a ✓ 8 7.d odd 6 1 inner
448.2.q.a ✓ 8 8.b even 2 1 inner
448.2.q.a ✓ 8 8.d odd 2 1 inner
448.2.q.a ✓ 8 28.f even 6 1 inner
448.2.q.a ✓ 8 56.j odd 6 1 inner
448.2.q.a ✓ 8 56.m even 6 1 inner
3136.2.e.a 8 7.c even 3 1
3136.2.e.a 8 7.d odd 6 1
3136.2.e.a 8 28.f even 6 1
3136.2.e.a 8 28.g odd 6 1
3136.2.e.a 8 56.j odd 6 1
3136.2.e.a 8 56.k odd 6 1
3136.2.e.a 8 56.m even 6 1
3136.2.e.a 8 56.p even 6 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(448, [\chi])\):

\( T_{3}^{4} - 5T_{3}^{2} + 25 \) Copy content Toggle raw display
\( T_{5}^{4} + 5T_{5}^{2} + 25 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( (T^{4} - 5 T^{2} + 25)^{2} \) Copy content Toggle raw display
$5$ \( (T^{4} + 5 T^{2} + 25)^{2} \) Copy content Toggle raw display
$7$ \( (T^{4} + 2 T^{2} + 49)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} + 15 T^{2} + 225)^{2} \) Copy content Toggle raw display
$13$ \( T^{8} \) Copy content Toggle raw display
$17$ \( (T^{2} - 9 T + 27)^{4} \) Copy content Toggle raw display
$19$ \( (T^{4} - 45 T^{2} + 2025)^{2} \) Copy content Toggle raw display
$23$ \( (T^{4} - 9 T^{2} + 81)^{2} \) Copy content Toggle raw display
$29$ \( (T^{2} + 60)^{4} \) Copy content Toggle raw display
$31$ \( (T^{4} + 3 T^{2} + 9)^{2} \) Copy content Toggle raw display
$37$ \( (T^{4} - 135 T^{2} + 18225)^{2} \) Copy content Toggle raw display
$41$ \( (T^{2} + 108)^{4} \) Copy content Toggle raw display
$43$ \( T^{8} \) Copy content Toggle raw display
$47$ \( (T^{4} + 27 T^{2} + 729)^{2} \) Copy content Toggle raw display
$53$ \( (T^{4} - 15 T^{2} + 225)^{2} \) Copy content Toggle raw display
$59$ \( (T^{4} - 5 T^{2} + 25)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} + 45 T^{2} + 2025)^{2} \) Copy content Toggle raw display
$67$ \( (T^{4} + 135 T^{2} + 18225)^{2} \) Copy content Toggle raw display
$71$ \( (T^{2} + 36)^{4} \) Copy content Toggle raw display
$73$ \( (T^{2} + 9 T + 27)^{4} \) Copy content Toggle raw display
$79$ \( (T^{4} - 169 T^{2} + 28561)^{2} \) Copy content Toggle raw display
$83$ \( (T^{2} + 20)^{4} \) Copy content Toggle raw display
$89$ \( (T^{2} + 9 T + 27)^{4} \) Copy content Toggle raw display
$97$ \( (T^{2} + 12)^{4} \) Copy content Toggle raw display
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