Properties

Label 448.2.e.b
Level $448$
Weight $2$
Character orbit 448.e
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(223,448)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(448, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 1, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("448.223");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 448 = 2^{6} \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 448.e (of order \(2\), degree \(1\), 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: \(8\)
Coefficient field: \(\Q(\zeta_{24})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{4} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{10} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-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.

\(f(q)\) \(=\) \( q + \beta_{2} q^{3} + \beta_{6} q^{5} - \beta_{4} q^{7} + q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{2} q^{3} + \beta_{6} q^{5} - \beta_{4} q^{7} + q^{9} + \beta_{3} q^{11} + 3 \beta_{6} q^{13} - \beta_1 q^{15} - \beta_{7} q^{17} + 3 \beta_{2} q^{19} + (\beta_{6} + \beta_{5}) q^{21} - 3 q^{25} + 4 \beta_{2} q^{27} + ( - 2 \beta_{4} - \beta_1) q^{31} - \beta_{7} q^{33} + ( - \beta_{3} - \beta_{2}) q^{35} + 2 \beta_{5} q^{37} - 3 \beta_1 q^{39} + 2 \beta_{7} q^{41} + \beta_{3} q^{43} + \beta_{6} q^{45} + (2 \beta_{4} + \beta_1) q^{47} + ( - \beta_{7} + 5) q^{49} - 2 \beta_{3} q^{51} - 4 \beta_{5} q^{53} + (2 \beta_{4} + \beta_1) q^{55} - 6 q^{57} - 5 \beta_{2} q^{59} - 3 \beta_{6} q^{61} - \beta_{4} q^{63} + 6 q^{65} + 3 \beta_{3} q^{67} + 3 \beta_1 q^{71} + \beta_{7} q^{73} - 3 \beta_{2} q^{75} + ( - 6 \beta_{6} + \beta_{5}) q^{77} + 7 \beta_1 q^{79} - 5 q^{81} - 7 \beta_{2} q^{83} - 2 \beta_{5} q^{85} + 3 \beta_{7} q^{89} + ( - 3 \beta_{3} - 3 \beta_{2}) q^{91} + 2 \beta_{5} q^{93} - 3 \beta_1 q^{95} - \beta_{7} q^{97} + \beta_{3} q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 8 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 8 q^{9} - 24 q^{25} + 40 q^{49} - 48 q^{57} + 48 q^{65} - 40 q^{81}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring

\(\beta_{1}\)\(=\) \( 2\zeta_{24}^{6} \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( -\zeta_{24}^{5} - \zeta_{24}^{3} + \zeta_{24} \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( -2\zeta_{24}^{6} + 4\zeta_{24}^{2} \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( -2\zeta_{24}^{7} - \zeta_{24}^{6} + \zeta_{24}^{5} + \zeta_{24}^{3} + \zeta_{24} \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( 4\zeta_{24}^{4} - 2 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( -\zeta_{24}^{5} + \zeta_{24}^{3} + \zeta_{24} \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( 4\zeta_{24}^{7} + 2\zeta_{24}^{5} - 2\zeta_{24}^{3} + 2\zeta_{24} \) Copy content Toggle raw display
\(\zeta_{24}\)\(=\) \( ( \beta_{7} + 2\beta_{6} + 2\beta_{4} + 2\beta_{2} + \beta_1 ) / 8 \) Copy content Toggle raw display
\(\zeta_{24}^{2}\)\(=\) \( ( \beta_{3} + \beta_1 ) / 4 \) Copy content Toggle raw display
\(\zeta_{24}^{3}\)\(=\) \( ( \beta_{6} - \beta_{2} ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{4}\)\(=\) \( ( \beta_{5} + 2 ) / 4 \) Copy content Toggle raw display
\(\zeta_{24}^{5}\)\(=\) \( ( \beta_{7} - 2\beta_{6} + 2\beta_{4} - 2\beta_{2} + \beta_1 ) / 8 \) Copy content Toggle raw display
\(\zeta_{24}^{6}\)\(=\) \( ( \beta_1 ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{7}\)\(=\) \( ( \beta_{7} + 2\beta_{6} - 2\beta_{4} - 2\beta_{2} - \beta_1 ) / 8 \) Copy content Toggle raw display

Character values

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

\(n\) \(127\) \(129\) \(197\)
\(\chi(n)\) \(-1\) \(-1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
223.1
0.258819 0.965926i
−0.965926 + 0.258819i
0.965926 + 0.258819i
−0.258819 0.965926i
0.258819 + 0.965926i
−0.965926 0.258819i
0.965926 0.258819i
−0.258819 + 0.965926i
0 1.41421i 0 −1.41421 0 −2.44949 1.00000i 0 1.00000 0
223.2 0 1.41421i 0 −1.41421 0 2.44949 1.00000i 0 1.00000 0
223.3 0 1.41421i 0 1.41421 0 −2.44949 + 1.00000i 0 1.00000 0
223.4 0 1.41421i 0 1.41421 0 2.44949 + 1.00000i 0 1.00000 0
223.5 0 1.41421i 0 −1.41421 0 −2.44949 + 1.00000i 0 1.00000 0
223.6 0 1.41421i 0 −1.41421 0 2.44949 + 1.00000i 0 1.00000 0
223.7 0 1.41421i 0 1.41421 0 −2.44949 1.00000i 0 1.00000 0
223.8 0 1.41421i 0 1.41421 0 2.44949 1.00000i 0 1.00000 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 223.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 inner
7.b odd 2 1 inner
8.b even 2 1 inner
8.d odd 2 1 inner
28.d even 2 1 inner
56.e even 2 1 inner
56.h odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 448.2.e.b 8
3.b odd 2 1 4032.2.p.f 8
4.b odd 2 1 inner 448.2.e.b 8
7.b odd 2 1 inner 448.2.e.b 8
8.b even 2 1 inner 448.2.e.b 8
8.d odd 2 1 inner 448.2.e.b 8
12.b even 2 1 4032.2.p.f 8
16.e even 4 2 1792.2.f.j 8
16.f odd 4 2 1792.2.f.j 8
21.c even 2 1 4032.2.p.f 8
24.f even 2 1 4032.2.p.f 8
24.h odd 2 1 4032.2.p.f 8
28.d even 2 1 inner 448.2.e.b 8
56.e even 2 1 inner 448.2.e.b 8
56.h odd 2 1 inner 448.2.e.b 8
84.h odd 2 1 4032.2.p.f 8
112.j even 4 2 1792.2.f.j 8
112.l odd 4 2 1792.2.f.j 8
168.e odd 2 1 4032.2.p.f 8
168.i even 2 1 4032.2.p.f 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
448.2.e.b 8 1.a even 1 1 trivial
448.2.e.b 8 4.b odd 2 1 inner
448.2.e.b 8 7.b odd 2 1 inner
448.2.e.b 8 8.b even 2 1 inner
448.2.e.b 8 8.d odd 2 1 inner
448.2.e.b 8 28.d even 2 1 inner
448.2.e.b 8 56.e even 2 1 inner
448.2.e.b 8 56.h odd 2 1 inner
1792.2.f.j 8 16.e even 4 2
1792.2.f.j 8 16.f odd 4 2
1792.2.f.j 8 112.j even 4 2
1792.2.f.j 8 112.l odd 4 2
4032.2.p.f 8 3.b odd 2 1
4032.2.p.f 8 12.b even 2 1
4032.2.p.f 8 21.c even 2 1
4032.2.p.f 8 24.f even 2 1
4032.2.p.f 8 24.h odd 2 1
4032.2.p.f 8 84.h odd 2 1
4032.2.p.f 8 168.e odd 2 1
4032.2.p.f 8 168.i even 2 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{2} + 2 \) acting on \(S_{2}^{\mathrm{new}}(448, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( (T^{2} + 2)^{4} \) Copy content Toggle raw display
$5$ \( (T^{2} - 2)^{4} \) Copy content Toggle raw display
$7$ \( (T^{4} - 10 T^{2} + 49)^{2} \) Copy content Toggle raw display
$11$ \( (T^{2} - 12)^{4} \) Copy content Toggle raw display
$13$ \( (T^{2} - 18)^{4} \) Copy content Toggle raw display
$17$ \( (T^{2} + 24)^{4} \) Copy content Toggle raw display
$19$ \( (T^{2} + 18)^{4} \) Copy content Toggle raw display
$23$ \( T^{8} \) Copy content Toggle raw display
$29$ \( T^{8} \) Copy content Toggle raw display
$31$ \( (T^{2} - 24)^{4} \) Copy content Toggle raw display
$37$ \( (T^{2} + 48)^{4} \) Copy content Toggle raw display
$41$ \( (T^{2} + 96)^{4} \) Copy content Toggle raw display
$43$ \( (T^{2} - 12)^{4} \) Copy content Toggle raw display
$47$ \( (T^{2} - 24)^{4} \) Copy content Toggle raw display
$53$ \( (T^{2} + 192)^{4} \) Copy content Toggle raw display
$59$ \( (T^{2} + 50)^{4} \) Copy content Toggle raw display
$61$ \( (T^{2} - 18)^{4} \) Copy content Toggle raw display
$67$ \( (T^{2} - 108)^{4} \) Copy content Toggle raw display
$71$ \( (T^{2} + 36)^{4} \) Copy content Toggle raw display
$73$ \( (T^{2} + 24)^{4} \) Copy content Toggle raw display
$79$ \( (T^{2} + 196)^{4} \) Copy content Toggle raw display
$83$ \( (T^{2} + 98)^{4} \) Copy content Toggle raw display
$89$ \( (T^{2} + 216)^{4} \) Copy content Toggle raw display
$97$ \( (T^{2} + 24)^{4} \) Copy content Toggle raw display
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