Properties

Label 1848.2.a.r
Level $1848$
Weight $2$
Character orbit 1848.a
Self dual yes
Analytic conductor $14.756$
Analytic rank $0$
Dimension $2$
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] = [1848,2,Mod(1,1848)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1848, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 0, 0, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1848.1");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1848 = 2^{3} \cdot 3 \cdot 7 \cdot 11 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1848.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: \(14.7563542935\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{17}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - x - 4 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
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)
 

Coefficients of the \(q\)-expansion are expressed in terms of \(\beta = \frac{1}{2}(1 + \sqrt{17})\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - q^{3} + (\beta + 1) q^{5} + q^{7} + q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - q^{3} + (\beta + 1) q^{5} + q^{7} + q^{9} + q^{11} + ( - \beta + 3) q^{13} + ( - \beta - 1) q^{15} + 2 q^{17} + (\beta - 1) q^{19} - q^{21} + 3 \beta q^{25} - q^{27} + ( - \beta + 3) q^{29} + (2 \beta - 2) q^{31} - q^{33} + (\beta + 1) q^{35} + (5 \beta - 3) q^{37} + (\beta - 3) q^{39} + ( - 2 \beta + 4) q^{41} - 4 \beta q^{43} + (\beta + 1) q^{45} + ( - 3 \beta - 1) q^{47} + q^{49} - 2 q^{51} + ( - 2 \beta + 8) q^{53} + (\beta + 1) q^{55} + ( - \beta + 1) q^{57} + ( - 3 \beta + 3) q^{59} + ( - 4 \beta + 2) q^{61} + q^{63} + (\beta - 1) q^{65} + ( - \beta + 1) q^{67} + (4 \beta - 4) q^{71} + (\beta + 5) q^{73} - 3 \beta q^{75} + q^{77} + ( - 4 \beta + 4) q^{79} + q^{81} + (2 \beta + 2) q^{83} + (2 \beta + 2) q^{85} + (\beta - 3) q^{87} + ( - 4 \beta + 6) q^{89} + ( - \beta + 3) q^{91} + ( - 2 \beta + 2) q^{93} + (\beta + 3) q^{95} + (2 \beta + 8) q^{97} + q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 2 q^{3} + 3 q^{5} + 2 q^{7} + 2 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 2 q - 2 q^{3} + 3 q^{5} + 2 q^{7} + 2 q^{9} + 2 q^{11} + 5 q^{13} - 3 q^{15} + 4 q^{17} - q^{19} - 2 q^{21} + 3 q^{25} - 2 q^{27} + 5 q^{29} - 2 q^{31} - 2 q^{33} + 3 q^{35} - q^{37} - 5 q^{39} + 6 q^{41} - 4 q^{43} + 3 q^{45} - 5 q^{47} + 2 q^{49} - 4 q^{51} + 14 q^{53} + 3 q^{55} + q^{57} + 3 q^{59} + 2 q^{63} - q^{65} + q^{67} - 4 q^{71} + 11 q^{73} - 3 q^{75} + 2 q^{77} + 4 q^{79} + 2 q^{81} + 6 q^{83} + 6 q^{85} - 5 q^{87} + 8 q^{89} + 5 q^{91} + 2 q^{93} + 7 q^{95} + 18 q^{97} + 2 q^{99}+O(q^{100}) \) 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
−1.56155
2.56155
0 −1.00000 0 −0.561553 0 1.00000 0 1.00000 0
1.2 0 −1.00000 0 3.56155 0 1.00000 0 1.00000 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \(-1\)
\(3\) \(1\)
\(7\) \(-1\)
\(11\) \(-1\)

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 1848.2.a.r 2
3.b odd 2 1 5544.2.a.bb 2
4.b odd 2 1 3696.2.a.bj 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1848.2.a.r 2 1.a even 1 1 trivial
3696.2.a.bj 2 4.b odd 2 1
5544.2.a.bb 2 3.b odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(1848))\):

\( T_{5}^{2} - 3T_{5} - 2 \) Copy content Toggle raw display
\( T_{13}^{2} - 5T_{13} + 2 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} \) Copy content Toggle raw display
$3$ \( (T + 1)^{2} \) Copy content Toggle raw display
$5$ \( T^{2} - 3T - 2 \) Copy content Toggle raw display
$7$ \( (T - 1)^{2} \) Copy content Toggle raw display
$11$ \( (T - 1)^{2} \) Copy content Toggle raw display
$13$ \( T^{2} - 5T + 2 \) Copy content Toggle raw display
$17$ \( (T - 2)^{2} \) Copy content Toggle raw display
$19$ \( T^{2} + T - 4 \) Copy content Toggle raw display
$23$ \( T^{2} \) Copy content Toggle raw display
$29$ \( T^{2} - 5T + 2 \) Copy content Toggle raw display
$31$ \( T^{2} + 2T - 16 \) Copy content Toggle raw display
$37$ \( T^{2} + T - 106 \) Copy content Toggle raw display
$41$ \( T^{2} - 6T - 8 \) Copy content Toggle raw display
$43$ \( T^{2} + 4T - 64 \) Copy content Toggle raw display
$47$ \( T^{2} + 5T - 32 \) Copy content Toggle raw display
$53$ \( T^{2} - 14T + 32 \) Copy content Toggle raw display
$59$ \( T^{2} - 3T - 36 \) Copy content Toggle raw display
$61$ \( T^{2} - 68 \) Copy content Toggle raw display
$67$ \( T^{2} - T - 4 \) Copy content Toggle raw display
$71$ \( T^{2} + 4T - 64 \) Copy content Toggle raw display
$73$ \( T^{2} - 11T + 26 \) Copy content Toggle raw display
$79$ \( T^{2} - 4T - 64 \) Copy content Toggle raw display
$83$ \( T^{2} - 6T - 8 \) Copy content Toggle raw display
$89$ \( T^{2} - 8T - 52 \) Copy content Toggle raw display
$97$ \( T^{2} - 18T + 64 \) Copy content Toggle raw display
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