Properties

Label 196.3.c.a
Level $196$
Weight $3$
Character orbit 196.c
Self dual yes
Analytic conductor $5.341$
Analytic rank $0$
Dimension $2$
CM discriminant -4
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [196,3,Mod(99,196)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(196, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 0]))
 
N = Newforms(chi, 3, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("196.99");
 
S:= CuspForms(chi, 3);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 196 = 2^{2} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 3 \)
Character orbit: \([\chi]\) \(=\) 196.c (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: yes
Analytic conductor: \(5.34061318146\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{2}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - 2 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 7 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{2}]$

$q$-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 \(\beta = 7\sqrt{2}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - 2 q^{2} + 4 q^{4} + \beta q^{5} - 8 q^{8} + 9 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - 2 q^{2} + 4 q^{4} + \beta q^{5} - 8 q^{8} + 9 q^{9} - 2 \beta q^{10} - \beta q^{13} + 16 q^{16} - \beta q^{17} - 18 q^{18} + 4 \beta q^{20} + 73 q^{25} + 2 \beta q^{26} + 40 q^{29} - 32 q^{32} + 2 \beta q^{34} + 36 q^{36} + 24 q^{37} - 8 \beta q^{40} - 7 \beta q^{41} + 9 \beta q^{45} - 146 q^{50} - 4 \beta q^{52} - 90 q^{53} - 80 q^{58} + 7 \beta q^{61} + 64 q^{64} - 98 q^{65} - 4 \beta q^{68} - 72 q^{72} + \beta q^{73} - 48 q^{74} + 16 \beta q^{80} + 81 q^{81} + 14 \beta q^{82} - 98 q^{85} - 17 \beta q^{89} - 18 \beta q^{90} + \beta q^{97} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 4 q^{2} + 8 q^{4} - 16 q^{8} + 18 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 2 q - 4 q^{2} + 8 q^{4} - 16 q^{8} + 18 q^{9} + 32 q^{16} - 36 q^{18} + 146 q^{25} + 80 q^{29} - 64 q^{32} + 72 q^{36} + 48 q^{37} - 292 q^{50} - 180 q^{53} - 160 q^{58} + 128 q^{64} - 196 q^{65} - 144 q^{72} - 96 q^{74} + 162 q^{81} - 196 q^{85}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/196\mathbb{Z}\right)^\times\).

\(n\) \(99\) \(101\)
\(\chi(n)\) \(-1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
99.1
−1.41421
1.41421
−2.00000 0 4.00000 −9.89949 0 0 −8.00000 9.00000 19.7990
99.2 −2.00000 0 4.00000 9.89949 0 0 −8.00000 9.00000 −19.7990
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 CM by \(\Q(\sqrt{-1}) \)
7.b odd 2 1 inner
28.d even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 196.3.c.a 2
4.b odd 2 1 CM 196.3.c.a 2
7.b odd 2 1 inner 196.3.c.a 2
7.c even 3 2 196.3.g.e 4
7.d odd 6 2 196.3.g.e 4
28.d even 2 1 inner 196.3.c.a 2
28.f even 6 2 196.3.g.e 4
28.g odd 6 2 196.3.g.e 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
196.3.c.a 2 1.a even 1 1 trivial
196.3.c.a 2 4.b odd 2 1 CM
196.3.c.a 2 7.b odd 2 1 inner
196.3.c.a 2 28.d even 2 1 inner
196.3.g.e 4 7.c even 3 2
196.3.g.e 4 7.d odd 6 2
196.3.g.e 4 28.f even 6 2
196.3.g.e 4 28.g odd 6 2

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{3}^{\mathrm{new}}(196, [\chi])\):

\( T_{3} \) Copy content Toggle raw display
\( T_{5}^{2} - 98 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T + 2)^{2} \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( T^{2} - 98 \) Copy content Toggle raw display
$7$ \( T^{2} \) Copy content Toggle raw display
$11$ \( T^{2} \) Copy content Toggle raw display
$13$ \( T^{2} - 98 \) Copy content Toggle raw display
$17$ \( T^{2} - 98 \) Copy content Toggle raw display
$19$ \( T^{2} \) Copy content Toggle raw display
$23$ \( T^{2} \) Copy content Toggle raw display
$29$ \( (T - 40)^{2} \) Copy content Toggle raw display
$31$ \( T^{2} \) Copy content Toggle raw display
$37$ \( (T - 24)^{2} \) Copy content Toggle raw display
$41$ \( T^{2} - 4802 \) Copy content Toggle raw display
$43$ \( T^{2} \) Copy content Toggle raw display
$47$ \( T^{2} \) Copy content Toggle raw display
$53$ \( (T + 90)^{2} \) Copy content Toggle raw display
$59$ \( T^{2} \) Copy content Toggle raw display
$61$ \( T^{2} - 4802 \) Copy content Toggle raw display
$67$ \( T^{2} \) Copy content Toggle raw display
$71$ \( T^{2} \) Copy content Toggle raw display
$73$ \( T^{2} - 98 \) Copy content Toggle raw display
$79$ \( T^{2} \) Copy content Toggle raw display
$83$ \( T^{2} \) Copy content Toggle raw display
$89$ \( T^{2} - 28322 \) Copy content Toggle raw display
$97$ \( T^{2} - 98 \) Copy content Toggle raw display
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