Properties

Label 896.2.i.h
Level $896$
Weight $2$
Character orbit 896.i
Analytic conductor $7.155$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [896,2,Mod(513,896)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(896, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([0, 0, 2]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("896.513");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 896 = 2^{7} \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 896.i (of order \(3\), 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: \(7.15459602111\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{3})\)
Coefficient field: 8.0.3010058496.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - 4x^{7} + 6x^{6} + 2x^{5} - 17x^{4} + 6x^{3} + 54x^{2} - 108x + 81 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 3 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{3}]$

$q$-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.

\(f(q)\) \(=\) \( q + \beta_{4} q^{3} + ( - \beta_{7} - \beta_{6} + \beta_{5}) q^{5} + ( - \beta_{7} - \beta_{4} + \cdots + \beta_1) q^{7}+ \cdots + ( - \beta_{7} + \beta_{5} + 2 \beta_{3} + \cdots - 1) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{4} q^{3} + ( - \beta_{7} - \beta_{6} + \beta_{5}) q^{5} + ( - \beta_{7} - \beta_{4} + \cdots + \beta_1) q^{7}+ \cdots + (3 \beta_{7} + \beta_{6} + 2 \beta_{5} + \cdots - 5) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 2 q^{3} + 2 q^{5} + 2 q^{7} - 4 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 2 q^{3} + 2 q^{5} + 2 q^{7} - 4 q^{9} + 4 q^{11} - 16 q^{13} + 20 q^{15} - 4 q^{17} + 8 q^{19} - 10 q^{21} - 4 q^{23} - 8 q^{25} - 40 q^{27} + 6 q^{31} - 8 q^{33} + 8 q^{35} - 2 q^{37} + 2 q^{39} + 24 q^{41} + 24 q^{43} + 8 q^{45} + 2 q^{47} - 4 q^{49} - 4 q^{51} + 18 q^{53} - 32 q^{55} - 40 q^{57} - 10 q^{59} + 14 q^{61} - 22 q^{63} + 8 q^{65} - 2 q^{67} - 4 q^{69} - 8 q^{73} - 8 q^{75} - 14 q^{77} - 16 q^{79} - 40 q^{81} - 48 q^{83} + 20 q^{85} + 18 q^{87} - 16 q^{89} - 4 q^{91} - 30 q^{93} + 32 q^{95} + 80 q^{97} - 44 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} - 4x^{7} + 6x^{6} + 2x^{5} - 17x^{4} + 6x^{3} + 54x^{2} - 108x + 81 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( 2\nu^{7} + 10\nu^{6} - 15\nu^{5} - 14\nu^{4} + 191\nu^{3} + 93\nu^{2} - 225\nu + 567 ) / 351 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 8\nu^{7} - 38\nu^{6} + 18\nu^{5} + 61\nu^{4} - 94\nu^{3} - 174\nu^{2} + 504\nu - 189 ) / 351 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 7\nu^{7} - 82\nu^{6} + 123\nu^{5} + 68\nu^{4} - 443\nu^{3} + 150\nu^{2} + 1377\nu - 2052 ) / 351 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 20\nu^{7} - 56\nu^{6} + 6\nu^{5} + 94\nu^{4} - 157\nu^{3} - 162\nu^{2} + 909\nu - 648 ) / 351 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -25\nu^{7} + 70\nu^{6} - 66\nu^{5} - 59\nu^{4} + 284\nu^{3} + 261\nu^{2} - 1107\nu + 1512 ) / 351 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 29\nu^{7} - 89\nu^{6} + 75\nu^{5} + 265\nu^{4} - 331\nu^{3} - 348\nu^{2} + 1710\nu - 1431 ) / 351 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -53\nu^{7} + 125\nu^{6} - 51\nu^{5} - 331\nu^{4} + 457\nu^{3} + 675\nu^{2} - 1818\nu + 1647 ) / 351 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( 2\beta_{7} + 2\beta_{6} - \beta_{5} + 2\beta_{4} - \beta_{3} - \beta_{2} - \beta _1 + 2 ) / 3 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( -\beta_{7} - \beta_{6} + 2\beta_{5} + 2\beta_{4} + 2\beta_{3} - 4\beta_{2} + 2\beta _1 + 2 ) / 3 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 2\beta_{7} + 2\beta_{6} - \beta_{5} - \beta_{4} - \beta_{3} + 5\beta_{2} + 5\beta _1 - 10 ) / 3 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( -4\beta_{7} + 2\beta_{6} + 8\beta_{5} - 4\beta_{4} + 2\beta_{3} - \beta_{2} + 2\beta _1 - 7 ) / 3 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -\beta_{7} + 5\beta_{6} - 10\beta_{5} - 25\beta_{4} + 2\beta_{3} + 2\beta_{2} + 11\beta _1 + 17 ) / 3 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( 14\beta_{7} + 29\beta_{6} - 19\beta_{5} + 2\beta_{4} - 16\beta_{3} - 58\beta_{2} - 19\beta _1 + 44 ) / 3 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( -25\beta_{7} - 13\beta_{6} - 34\beta_{5} + 2\beta_{4} - \beta_{3} - 106\beta_{2} + 35\beta _1 + 95 ) / 3 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/896\mathbb{Z}\right)^\times\).

\(n\) \(127\) \(129\) \(645\)
\(\chi(n)\) \(1\) \(-1 + \beta_{2}\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
513.1
0.745265 1.56352i
−1.54667 + 0.779618i
1.65412 0.513691i
1.14729 + 1.29759i
0.745265 + 1.56352i
−1.54667 0.779618i
1.65412 + 0.513691i
1.14729 1.29759i
0 −0.981412 1.69985i 0 −1.22668 + 2.12467i 0 1.23615 + 2.33922i 0 −0.426337 + 0.738438i 0
513.2 0 −0.0981673 0.170031i 0 1.94851 3.37491i 0 2.64484 0.0694427i 0 1.48073 2.56469i 0
513.3 0 0.382191 + 0.661975i 0 −0.771931 + 1.33702i 0 −1.03631 2.43435i 0 1.20786 2.09207i 0
513.4 0 1.69739 + 2.93996i 0 1.05010 1.81883i 0 −1.84467 + 1.89662i 0 −4.26225 + 7.38243i 0
641.1 0 −0.981412 + 1.69985i 0 −1.22668 2.12467i 0 1.23615 2.33922i 0 −0.426337 0.738438i 0
641.2 0 −0.0981673 + 0.170031i 0 1.94851 + 3.37491i 0 2.64484 + 0.0694427i 0 1.48073 + 2.56469i 0
641.3 0 0.382191 0.661975i 0 −0.771931 1.33702i 0 −1.03631 + 2.43435i 0 1.20786 + 2.09207i 0
641.4 0 1.69739 2.93996i 0 1.05010 + 1.81883i 0 −1.84467 1.89662i 0 −4.26225 7.38243i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 513.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
7.c even 3 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 896.2.i.h yes 8
4.b odd 2 1 896.2.i.c yes 8
7.c even 3 1 inner 896.2.i.h yes 8
7.c even 3 1 6272.2.a.y 4
7.d odd 6 1 6272.2.a.bs 4
8.b even 2 1 896.2.i.a 8
8.d odd 2 1 896.2.i.f yes 8
28.f even 6 1 6272.2.a.bf 4
28.g odd 6 1 896.2.i.c yes 8
28.g odd 6 1 6272.2.a.br 4
56.j odd 6 1 6272.2.a.bb 4
56.k odd 6 1 896.2.i.f yes 8
56.k odd 6 1 6272.2.a.bc 4
56.m even 6 1 6272.2.a.bo 4
56.p even 6 1 896.2.i.a 8
56.p even 6 1 6272.2.a.bv 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
896.2.i.a 8 8.b even 2 1
896.2.i.a 8 56.p even 6 1
896.2.i.c yes 8 4.b odd 2 1
896.2.i.c yes 8 28.g odd 6 1
896.2.i.f yes 8 8.d odd 2 1
896.2.i.f yes 8 56.k odd 6 1
896.2.i.h yes 8 1.a even 1 1 trivial
896.2.i.h yes 8 7.c even 3 1 inner
6272.2.a.y 4 7.c even 3 1
6272.2.a.bb 4 56.j odd 6 1
6272.2.a.bc 4 56.k odd 6 1
6272.2.a.bf 4 28.f even 6 1
6272.2.a.bo 4 56.m even 6 1
6272.2.a.br 4 28.g odd 6 1
6272.2.a.bs 4 7.d odd 6 1
6272.2.a.bv 4 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 \(S_{2}^{\mathrm{new}}(896, [\chi])\):

\( T_{3}^{8} - 2T_{3}^{7} + 10T_{3}^{6} + 4T_{3}^{5} + 43T_{3}^{4} - 20T_{3}^{3} + 22T_{3}^{2} + 4T_{3} + 1 \) Copy content Toggle raw display
\( T_{5}^{8} - 2T_{5}^{7} + 16T_{5}^{6} + 4T_{5}^{5} + 133T_{5}^{4} + 4T_{5}^{3} + 472T_{5}^{2} + 310T_{5} + 961 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} - 2 T^{7} + \cdots + 1 \) Copy content Toggle raw display
$5$ \( T^{8} - 2 T^{7} + \cdots + 961 \) Copy content Toggle raw display
$7$ \( T^{8} - 2 T^{7} + \cdots + 2401 \) Copy content Toggle raw display
$11$ \( T^{8} - 4 T^{7} + \cdots + 1225 \) Copy content Toggle raw display
$13$ \( (T^{4} + 8 T^{3} - 52 T + 28)^{2} \) Copy content Toggle raw display
$17$ \( T^{8} + 4 T^{7} + \cdots + 5329 \) Copy content Toggle raw display
$19$ \( T^{8} - 8 T^{7} + \cdots + 2401 \) Copy content Toggle raw display
$23$ \( T^{8} + 4 T^{7} + \cdots + 30625 \) Copy content Toggle raw display
$29$ \( (T^{4} - 60 T^{2} + \cdots + 156)^{2} \) Copy content Toggle raw display
$31$ \( T^{8} - 6 T^{7} + \cdots + 378225 \) Copy content Toggle raw display
$37$ \( T^{8} + 2 T^{7} + \cdots + 49729 \) Copy content Toggle raw display
$41$ \( (T^{4} - 12 T^{3} + \cdots + 2676)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} - 12 T^{3} + \cdots + 192)^{2} \) Copy content Toggle raw display
$47$ \( T^{8} - 2 T^{7} + \cdots + 212521 \) Copy content Toggle raw display
$53$ \( T^{8} - 18 T^{7} + \cdots + 893025 \) Copy content Toggle raw display
$59$ \( T^{8} + 10 T^{7} + \cdots + 2401 \) Copy content Toggle raw display
$61$ \( T^{8} - 14 T^{7} + \cdots + 7921 \) Copy content Toggle raw display
$67$ \( T^{8} + 2 T^{7} + \cdots + 896809 \) Copy content Toggle raw display
$71$ \( (T^{4} - 216 T^{2} + \cdots + 8400)^{2} \) Copy content Toggle raw display
$73$ \( T^{8} + 8 T^{7} + \cdots + 17161 \) Copy content Toggle raw display
$79$ \( T^{8} + 16 T^{7} + \cdots + 426409 \) Copy content Toggle raw display
$83$ \( (T^{4} + 24 T^{3} + \cdots - 1392)^{2} \) Copy content Toggle raw display
$89$ \( T^{8} + 16 T^{7} + \cdots + 1471369 \) Copy content Toggle raw display
$97$ \( (T^{4} - 40 T^{3} + \cdots + 2836)^{2} \) Copy content Toggle raw display
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