Properties

Label 2448.1.m.a
Level $2448$
Weight $1$
Character orbit 2448.m
Analytic conductor $1.222$
Analytic rank $0$
Dimension $2$
Projective image $S_{4}$
CM/RM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [2448,1,Mod(305,2448)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2448, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 1, 1]))
 
N = Newforms(chi, 1, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2448.305");
 
S:= CuspForms(chi, 1);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2448 = 2^{4} \cdot 3^{2} \cdot 17 \)
Weight: \( k \) \(=\) \( 1 \)
Character orbit: \([\chi]\) \(=\) 2448.m (of order \(2\), degree \(1\), not 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: \(1.22171115093\)
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: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 1224)
Projective image: \(S_{4}\)
Projective field: Galois closure of 4.2.7344.1
Artin image: $\GL(2,3)$
Artin field: Galois closure of 8.2.44010418176.1

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

\(f(q)\) \(=\) \( q - q^{5} - \beta q^{7} +O(q^{10}) \) Copy content Toggle raw display \( q - q^{5} - \beta q^{7} + q^{11} - q^{13} - q^{17} + q^{19} - q^{23} - \beta q^{31} + \beta q^{35} - \beta q^{37} - q^{41} - q^{43} - \beta q^{47} - q^{49} + \beta q^{53} - q^{55} + \beta q^{61} + q^{65} - \beta q^{73} - \beta q^{77} - \beta q^{83} + q^{85} - \beta q^{89} + \beta q^{91} - q^{95} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 2 q^{5}+O(q^{10}) \) Copy content Toggle raw display \( 2 q - 2 q^{5} + 2 q^{11} - 2 q^{13} - 2 q^{17} + 2 q^{19} - 2 q^{23} - 2 q^{41} - 2 q^{43} - 2 q^{49} - 2 q^{55} + 2 q^{65} + 2 q^{85} - 2 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2448\mathbb{Z}\right)^\times\).

\(n\) \(613\) \(1361\) \(1873\) \(2143\)
\(\chi(n)\) \(1\) \(-1\) \(-1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
305.1
1.41421i
1.41421i
0 0 0 −1.00000 0 1.41421i 0 0 0
305.2 0 0 0 −1.00000 0 1.41421i 0 0 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
51.c odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2448.1.m.a 2
3.b odd 2 1 2448.1.m.b 2
4.b odd 2 1 1224.1.m.a 2
12.b even 2 1 1224.1.m.b yes 2
17.b even 2 1 2448.1.m.b 2
51.c odd 2 1 inner 2448.1.m.a 2
68.d odd 2 1 1224.1.m.b yes 2
204.h even 2 1 1224.1.m.a 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1224.1.m.a 2 4.b odd 2 1
1224.1.m.a 2 204.h even 2 1
1224.1.m.b yes 2 12.b even 2 1
1224.1.m.b yes 2 68.d odd 2 1
2448.1.m.a 2 1.a even 1 1 trivial
2448.1.m.a 2 51.c odd 2 1 inner
2448.1.m.b 2 3.b odd 2 1
2448.1.m.b 2 17.b even 2 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5} + 1 \) acting on \(S_{1}^{\mathrm{new}}(2448, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( (T + 1)^{2} \) Copy content Toggle raw display
$7$ \( T^{2} + 2 \) Copy content Toggle raw display
$11$ \( (T - 1)^{2} \) Copy content Toggle raw display
$13$ \( (T + 1)^{2} \) Copy content Toggle raw display
$17$ \( (T + 1)^{2} \) Copy content Toggle raw display
$19$ \( (T - 1)^{2} \) Copy content Toggle raw display
$23$ \( (T + 1)^{2} \) Copy content Toggle raw display
$29$ \( T^{2} \) Copy content Toggle raw display
$31$ \( T^{2} + 2 \) Copy content Toggle raw display
$37$ \( T^{2} + 2 \) Copy content Toggle raw display
$41$ \( (T + 1)^{2} \) Copy content Toggle raw display
$43$ \( (T + 1)^{2} \) Copy content Toggle raw display
$47$ \( T^{2} + 2 \) Copy content Toggle raw display
$53$ \( T^{2} + 2 \) Copy content Toggle raw display
$59$ \( T^{2} \) Copy content Toggle raw display
$61$ \( T^{2} + 2 \) Copy content Toggle raw display
$67$ \( T^{2} \) Copy content Toggle raw display
$71$ \( T^{2} \) Copy content Toggle raw display
$73$ \( T^{2} + 2 \) Copy content Toggle raw display
$79$ \( T^{2} \) Copy content Toggle raw display
$83$ \( T^{2} + 2 \) Copy content Toggle raw display
$89$ \( T^{2} + 2 \) Copy content Toggle raw display
$97$ \( T^{2} \) Copy content Toggle raw display
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