Properties

Label 448.4.e.c
Level $448$
Weight $4$
Character orbit 448.e
Analytic conductor $26.433$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $8$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [448,4,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, 4, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("448.223");
 
S:= CuspForms(chi, 4);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 448 = 2^{6} \cdot 7 \)
Weight: \( k \) \(=\) \( 4 \)
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: \(26.4328556826\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: \(\mathbb{Q}[x]/(x^{8} + \cdots)\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 2567x^{4} + 2825761 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{17}]\)
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.

\(f(q)\) \(=\) \( q + \beta_{2} q^{3} + 3 \beta_{3} q^{5} + ( - \beta_{6} + 2 \beta_1) q^{7} + 17 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{2} q^{3} + 3 \beta_{3} q^{5} + ( - \beta_{6} + 2 \beta_1) q^{7} + 17 q^{9} + \beta_{5} q^{11} - 7 \beta_{3} q^{13} + 15 \beta_1 q^{15} + \beta_{7} q^{17} - 37 \beta_{2} q^{19} + (\beta_{4} - 5 \beta_{3}) q^{21} - 60 \beta_1 q^{23} - 35 q^{25} + 44 \beta_{2} q^{27} - 4 \beta_{4} q^{29} + ( - 10 \beta_{6} - 5 \beta_1) q^{31} + 5 \beta_{7} q^{33} + (3 \beta_{5} + 15 \beta_{2}) q^{35} - 2 \beta_{4} q^{37} - 35 \beta_1 q^{39} + 10 \beta_{7} q^{41} - 7 \beta_{5} q^{43} + 51 \beta_{3} q^{45} + ( - 22 \beta_{6} - 11 \beta_1) q^{47} + (5 \beta_{7} + 293) q^{49} - 2 \beta_{5} q^{51} + 8 \beta_{4} q^{53} + ( - 30 \beta_{6} - 15 \beta_1) q^{55} + 370 q^{57} - 69 \beta_{2} q^{59} - 257 \beta_{3} q^{61} + ( - 17 \beta_{6} + 34 \beta_1) q^{63} - 210 q^{65} + 3 \beta_{5} q^{67} + 120 \beta_{3} q^{69} - 129 \beta_1 q^{71} + 27 \beta_{7} q^{73} - 35 \beta_{2} q^{75} + (5 \beta_{4} + 318 \beta_{3}) q^{77} - 13 \beta_1 q^{79} + 19 q^{81} + 249 \beta_{2} q^{83} + 6 \beta_{4} q^{85} + ( - 40 \beta_{6} - 20 \beta_1) q^{87} + 25 \beta_{7} q^{89} + ( - 7 \beta_{5} - 35 \beta_{2}) q^{91} + 10 \beta_{4} q^{93} - 555 \beta_1 q^{95} + \beta_{7} q^{97} + 17 \beta_{5} q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 136 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 136 q^{9} - 280 q^{25} + 2344 q^{49} + 2960 q^{57} - 1680 q^{65} + 152 q^{81}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 2567x^{4} + 2825761 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( 2\nu^{6} + 8496\nu^{2} ) / 129437 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 36\nu^{7} - 1681\nu^{5} + 23491\nu^{3} - 1833971\nu ) / 5306917 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 36\nu^{7} + 1681\nu^{5} + 23491\nu^{3} + 1833971\nu ) / 5306917 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 4\nu^{4} + 5134 ) / 77 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -2\nu^{6} - 1772\nu^{2} ) / 1681 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -118\nu^{7} - 41\nu^{6} + 1681\nu^{5} - 371827\nu^{3} - 174168\nu^{2} + 12447805\nu ) / 5306917 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -236\nu^{7} - 3362\nu^{5} - 743654\nu^{3} - 24895610\nu ) / 5306917 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( -\beta_{7} + 2\beta_{6} - 2\beta_{3} + 2\beta_{2} + \beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{5} + 77\beta_1 ) / 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -9\beta_{7} - 18\beta_{6} - 59\beta_{3} - 59\beta_{2} - 9\beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( 77\beta_{4} - 5134 ) / 4 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( 1091\beta_{7} - 2182\beta_{6} + 14810\beta_{3} - 14810\beta_{2} - 1091\beta_1 ) / 8 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( -2124\beta_{5} - 34111\beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( 23491\beta_{7} + 46982\beta_{6} + 743654\beta_{3} + 743654\beta_{2} + 23491\beta_1 ) / 8 \) 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
5.24871 + 3.66757i
−3.66757 5.24871i
3.66757 5.24871i
−5.24871 + 3.66757i
5.24871 3.66757i
−3.66757 + 5.24871i
3.66757 + 5.24871i
−5.24871 3.66757i
0 3.16228i 0 −9.48683 0 −17.8326 + 5.00000i 0 17.0000 0
223.2 0 3.16228i 0 −9.48683 0 17.8326 + 5.00000i 0 17.0000 0
223.3 0 3.16228i 0 9.48683 0 −17.8326 5.00000i 0 17.0000 0
223.4 0 3.16228i 0 9.48683 0 17.8326 5.00000i 0 17.0000 0
223.5 0 3.16228i 0 −9.48683 0 −17.8326 5.00000i 0 17.0000 0
223.6 0 3.16228i 0 −9.48683 0 17.8326 5.00000i 0 17.0000 0
223.7 0 3.16228i 0 9.48683 0 −17.8326 + 5.00000i 0 17.0000 0
223.8 0 3.16228i 0 9.48683 0 17.8326 + 5.00000i 0 17.0000 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 448.4.e.c 8
4.b odd 2 1 inner 448.4.e.c 8
7.b odd 2 1 inner 448.4.e.c 8
8.b even 2 1 inner 448.4.e.c 8
8.d odd 2 1 inner 448.4.e.c 8
28.d even 2 1 inner 448.4.e.c 8
56.e even 2 1 inner 448.4.e.c 8
56.h odd 2 1 inner 448.4.e.c 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
448.4.e.c 8 1.a even 1 1 trivial
448.4.e.c 8 4.b odd 2 1 inner
448.4.e.c 8 7.b odd 2 1 inner
448.4.e.c 8 8.b even 2 1 inner
448.4.e.c 8 8.d odd 2 1 inner
448.4.e.c 8 28.d even 2 1 inner
448.4.e.c 8 56.e even 2 1 inner
448.4.e.c 8 56.h odd 2 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{2} + 10 \) acting on \(S_{4}^{\mathrm{new}}(448, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( (T^{2} + 10)^{4} \) Copy content Toggle raw display
$5$ \( (T^{2} - 90)^{4} \) Copy content Toggle raw display
$7$ \( (T^{4} - 586 T^{2} + 117649)^{2} \) Copy content Toggle raw display
$11$ \( (T^{2} - 3180)^{4} \) Copy content Toggle raw display
$13$ \( (T^{2} - 490)^{4} \) Copy content Toggle raw display
$17$ \( (T^{2} + 1272)^{4} \) Copy content Toggle raw display
$19$ \( (T^{2} + 13690)^{4} \) Copy content Toggle raw display
$23$ \( (T^{2} + 14400)^{4} \) Copy content Toggle raw display
$29$ \( (T^{2} + 50880)^{4} \) Copy content Toggle raw display
$31$ \( (T^{2} - 31800)^{4} \) Copy content Toggle raw display
$37$ \( (T^{2} + 12720)^{4} \) Copy content Toggle raw display
$41$ \( (T^{2} + 127200)^{4} \) Copy content Toggle raw display
$43$ \( (T^{2} - 155820)^{4} \) Copy content Toggle raw display
$47$ \( (T^{2} - 153912)^{4} \) Copy content Toggle raw display
$53$ \( (T^{2} + 203520)^{4} \) Copy content Toggle raw display
$59$ \( (T^{2} + 47610)^{4} \) Copy content Toggle raw display
$61$ \( (T^{2} - 660490)^{4} \) Copy content Toggle raw display
$67$ \( (T^{2} - 28620)^{4} \) Copy content Toggle raw display
$71$ \( (T^{2} + 66564)^{4} \) Copy content Toggle raw display
$73$ \( (T^{2} + 927288)^{4} \) Copy content Toggle raw display
$79$ \( (T^{2} + 676)^{4} \) Copy content Toggle raw display
$83$ \( (T^{2} + 620010)^{4} \) Copy content Toggle raw display
$89$ \( (T^{2} + 795000)^{4} \) Copy content Toggle raw display
$97$ \( (T^{2} + 1272)^{4} \) Copy content Toggle raw display
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