Properties

Label 102.2.h.a
Level $102$
Weight $2$
Character orbit 102.h
Analytic conductor $0.814$
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] = [102,2,Mod(19,102)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(102, base_ring=CyclotomicField(8))
 
chi = DirichletCharacter(H, H._module([0, 7]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("102.19");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 102 = 2 \cdot 3 \cdot 17 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 102.h (of order \(8\), 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: \(0.814474100617\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(2\) over \(\Q(\zeta_{8})\)
Coefficient field: \(\Q(\zeta_{16})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{8}]$

$q$-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 primitive root of unity \(\zeta_{16}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \zeta_{16}^{2} q^{2} + \zeta_{16}^{3} q^{3} + \zeta_{16}^{4} q^{4} + ( - \zeta_{16}^{6} + \zeta_{16}^{5} + \cdots + 1) q^{5} + \cdots + \zeta_{16}^{6} q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q - \zeta_{16}^{2} q^{2} + \zeta_{16}^{3} q^{3} + \zeta_{16}^{4} q^{4} + ( - \zeta_{16}^{6} + \zeta_{16}^{5} + \cdots + 1) q^{5} + \cdots + (2 \zeta_{16}^{4} + \cdots + 2 \zeta_{16}^{2}) q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 8 q^{5}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 8 q^{5} - 8 q^{10} - 8 q^{15} - 8 q^{16} - 8 q^{17} + 8 q^{18} - 16 q^{22} - 16 q^{23} + 8 q^{25} + 8 q^{26} - 16 q^{33} + 16 q^{34} - 16 q^{35} + 8 q^{39} + 16 q^{41} + 8 q^{42} - 16 q^{43} + 16 q^{44} + 32 q^{49} + 8 q^{50} - 8 q^{51} + 8 q^{53} + 24 q^{57} + 8 q^{60} - 32 q^{61} + 24 q^{65} + 48 q^{67} + 16 q^{69} + 16 q^{70} - 16 q^{71} - 24 q^{73} - 16 q^{75} - 16 q^{77} - 8 q^{78} - 8 q^{80} - 8 q^{82} - 32 q^{83} - 16 q^{84} + 8 q^{85} - 32 q^{86} - 24 q^{87} + 8 q^{90} - 8 q^{93} - 16 q^{94} + 48 q^{95} + 16 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/102\mathbb{Z}\right)^\times\).

\(n\) \(35\) \(37\)
\(\chi(n)\) \(1\) \(\zeta_{16}^{6}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
19.1
0.382683 0.923880i
−0.382683 + 0.923880i
−0.923880 + 0.382683i
0.923880 0.382683i
0.382683 + 0.923880i
−0.382683 0.923880i
−0.923880 0.382683i
0.923880 + 0.382683i
0.707107 + 0.707107i −0.923880 + 0.382683i 1.00000i 0.834089 + 2.01367i −0.923880 0.382683i 0.224171 0.541196i −0.707107 + 0.707107i 0.707107 0.707107i −0.834089 + 2.01367i
19.2 0.707107 + 0.707107i 0.923880 0.382683i 1.00000i −0.248303 0.599456i 0.923880 + 0.382683i −0.224171 + 0.541196i −0.707107 + 0.707107i 0.707107 0.707107i 0.248303 0.599456i
25.1 −0.707107 + 0.707107i −0.382683 + 0.923880i 1.00000i 3.01367 + 1.24830i −0.382683 0.923880i −3.15432 + 1.30656i 0.707107 + 0.707107i −0.707107 0.707107i −3.01367 + 1.24830i
25.2 −0.707107 + 0.707107i 0.382683 0.923880i 1.00000i 0.400544 + 0.165911i 0.382683 + 0.923880i 3.15432 1.30656i 0.707107 + 0.707107i −0.707107 0.707107i −0.400544 + 0.165911i
43.1 0.707107 0.707107i −0.923880 0.382683i 1.00000i 0.834089 2.01367i −0.923880 + 0.382683i 0.224171 + 0.541196i −0.707107 0.707107i 0.707107 + 0.707107i −0.834089 2.01367i
43.2 0.707107 0.707107i 0.923880 + 0.382683i 1.00000i −0.248303 + 0.599456i 0.923880 0.382683i −0.224171 0.541196i −0.707107 0.707107i 0.707107 + 0.707107i 0.248303 + 0.599456i
49.1 −0.707107 0.707107i −0.382683 0.923880i 1.00000i 3.01367 1.24830i −0.382683 + 0.923880i −3.15432 1.30656i 0.707107 0.707107i −0.707107 + 0.707107i −3.01367 1.24830i
49.2 −0.707107 0.707107i 0.382683 + 0.923880i 1.00000i 0.400544 0.165911i 0.382683 0.923880i 3.15432 + 1.30656i 0.707107 0.707107i −0.707107 + 0.707107i −0.400544 0.165911i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 19.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
17.d even 8 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 102.2.h.a 8
3.b odd 2 1 306.2.l.d 8
4.b odd 2 1 816.2.bq.b 8
17.d even 8 1 inner 102.2.h.a 8
17.e odd 16 1 1734.2.a.v 4
17.e odd 16 1 1734.2.a.w 4
17.e odd 16 2 1734.2.b.k 8
17.e odd 16 2 1734.2.f.j 8
17.e odd 16 2 1734.2.f.m 8
51.g odd 8 1 306.2.l.d 8
51.i even 16 1 5202.2.a.br 4
51.i even 16 1 5202.2.a.bt 4
68.g odd 8 1 816.2.bq.b 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
102.2.h.a 8 1.a even 1 1 trivial
102.2.h.a 8 17.d even 8 1 inner
306.2.l.d 8 3.b odd 2 1
306.2.l.d 8 51.g odd 8 1
816.2.bq.b 8 4.b odd 2 1
816.2.bq.b 8 68.g odd 8 1
1734.2.a.v 4 17.e odd 16 1
1734.2.a.w 4 17.e odd 16 1
1734.2.b.k 8 17.e odd 16 2
1734.2.f.j 8 17.e odd 16 2
1734.2.f.m 8 17.e odd 16 2
5202.2.a.br 4 51.i even 16 1
5202.2.a.bt 4 51.i even 16 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{8} - 8T_{5}^{7} + 28T_{5}^{6} - 56T_{5}^{5} + 72T_{5}^{4} - 32T_{5}^{3} + 24T_{5}^{2} - 16T_{5} + 4 \) acting on \(S_{2}^{\mathrm{new}}(102, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} + 1)^{2} \) Copy content Toggle raw display
$3$ \( T^{8} + 1 \) Copy content Toggle raw display
$5$ \( T^{8} - 8 T^{7} + \cdots + 4 \) Copy content Toggle raw display
$7$ \( T^{8} - 16 T^{6} + \cdots + 16 \) Copy content Toggle raw display
$11$ \( T^{8} + 16 T^{6} + \cdots + 256 \) Copy content Toggle raw display
$13$ \( T^{8} + 24 T^{6} + \cdots + 16 \) Copy content Toggle raw display
$17$ \( T^{8} + 8 T^{7} + \cdots + 83521 \) Copy content Toggle raw display
$19$ \( T^{8} - 32 T^{5} + \cdots + 61504 \) Copy content Toggle raw display
$23$ \( T^{8} + 16 T^{7} + \cdots + 15376 \) Copy content Toggle raw display
$29$ \( T^{8} - 12 T^{6} + \cdots + 749956 \) Copy content Toggle raw display
$31$ \( T^{8} - 32 T^{6} + \cdots + 38416 \) Copy content Toggle raw display
$37$ \( T^{8} - 44 T^{6} + \cdots + 148996 \) Copy content Toggle raw display
$41$ \( T^{8} - 16 T^{7} + \cdots + 264196 \) Copy content Toggle raw display
$43$ \( T^{8} + 16 T^{7} + \cdots + 13075456 \) Copy content Toggle raw display
$47$ \( T^{8} + 112 T^{6} + \cdots + 61504 \) Copy content Toggle raw display
$53$ \( T^{8} - 8 T^{7} + \cdots + 15376 \) Copy content Toggle raw display
$59$ \( T^{8} + 224 T^{5} + \cdots + 3655744 \) Copy content Toggle raw display
$61$ \( T^{8} + 32 T^{7} + \cdots + 857476 \) Copy content Toggle raw display
$67$ \( (T^{4} - 24 T^{3} + \cdots - 2312)^{2} \) Copy content Toggle raw display
$71$ \( T^{8} + 16 T^{7} + \cdots + 4624 \) Copy content Toggle raw display
$73$ \( T^{8} + 24 T^{7} + \cdots + 62948356 \) Copy content Toggle raw display
$79$ \( T^{8} + 208 T^{6} + \cdots + 99856 \) Copy content Toggle raw display
$83$ \( T^{8} + 32 T^{7} + \cdots + 141376 \) Copy content Toggle raw display
$89$ \( T^{8} + 360 T^{6} + \cdots + 4624 \) Copy content Toggle raw display
$97$ \( T^{8} - 16 T^{7} + \cdots + 219573124 \) Copy content Toggle raw display
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