Properties

Label 18.42.a.b
Level $18$
Weight $42$
Character orbit 18.a
Self dual yes
Analytic conductor $191.649$
Analytic rank $1$
Dimension $1$
CM no
Inner twists $1$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [18,42,Mod(1,18)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(18, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0]))
 
N = Newforms(chi, 42, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("18.1");
 
S:= CuspForms(chi, 42);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 18 = 2 \cdot 3^{2} \)
Weight: \( k \) \(=\) \( 42 \)
Character orbit: \([\chi]\) \(=\) 18.a (trivial)

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: \(191.649006822\)
Analytic rank: \(1\)
Dimension: \(1\)
Coefficient field: \(\mathbb{Q}\)
Coefficient ring: \(\mathbb{Z}\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 2)
Fricke sign: \(1\)
Sato-Tate group: $\mathrm{SU}(2)$

$q$-expansion

comment: q-expansion
 
sage: f.q_expansion() # note that sage often uses an isomorphic number field
 
gp: mfcoefs(f, 20)
 
\(f(q)\) \(=\) \( q + 1048576 q^{2} + 1099511627776 q^{4} + 48504195130650 q^{5} - 11\!\cdots\!68 q^{7}+ \cdots + 11\!\cdots\!76 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + 1048576 q^{2} + 1099511627776 q^{4} + 48504195130650 q^{5} - 11\!\cdots\!68 q^{7}+ \cdots - 31\!\cdots\!08 q^{98}+O(q^{100}) \) Copy content Toggle raw display

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1.1
0
1.04858e6 0 1.09951e12 4.85042e13 0 −1.19392e17 1.15292e18 0 5.08603e19
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \(-1\)
\(3\) \(-1\)

Inner twists

This newform does not admit any (nontrivial) inner twists.

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 18.42.a.b 1
3.b odd 2 1 2.42.a.a 1
12.b even 2 1 16.42.a.a 1
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
2.42.a.a 1 3.b odd 2 1
16.42.a.a 1 12.b even 2 1
18.42.a.b 1 1.a even 1 1 trivial

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5} - 48504195130650 \) acting on \(S_{42}^{\mathrm{new}}(\Gamma_0(18))\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T - 1048576 \) Copy content Toggle raw display
$3$ \( T \) Copy content Toggle raw display
$5$ \( T - 48504195130650 \) Copy content Toggle raw display
$7$ \( T + 11\!\cdots\!68 \) Copy content Toggle raw display
$11$ \( T + 31\!\cdots\!52 \) Copy content Toggle raw display
$13$ \( T + 11\!\cdots\!74 \) Copy content Toggle raw display
$17$ \( T - 26\!\cdots\!58 \) Copy content Toggle raw display
$19$ \( T - 67\!\cdots\!60 \) Copy content Toggle raw display
$23$ \( T - 13\!\cdots\!04 \) Copy content Toggle raw display
$29$ \( T + 13\!\cdots\!10 \) Copy content Toggle raw display
$31$ \( T - 30\!\cdots\!12 \) Copy content Toggle raw display
$37$ \( T + 22\!\cdots\!78 \) Copy content Toggle raw display
$41$ \( T - 50\!\cdots\!38 \) Copy content Toggle raw display
$43$ \( T + 31\!\cdots\!84 \) Copy content Toggle raw display
$47$ \( T + 13\!\cdots\!92 \) Copy content Toggle raw display
$53$ \( T - 32\!\cdots\!14 \) Copy content Toggle raw display
$59$ \( T + 34\!\cdots\!20 \) Copy content Toggle raw display
$61$ \( T + 97\!\cdots\!78 \) Copy content Toggle raw display
$67$ \( T - 16\!\cdots\!52 \) Copy content Toggle raw display
$71$ \( T + 11\!\cdots\!32 \) Copy content Toggle raw display
$73$ \( T - 19\!\cdots\!66 \) Copy content Toggle raw display
$79$ \( T + 56\!\cdots\!80 \) Copy content Toggle raw display
$83$ \( T - 60\!\cdots\!84 \) Copy content Toggle raw display
$89$ \( T + 11\!\cdots\!90 \) Copy content Toggle raw display
$97$ \( T + 63\!\cdots\!98 \) Copy content Toggle raw display
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