Properties

Label 1815.1.g.h
Level $1815$
Weight $1$
Character orbit 1815.g
Self dual yes
Analytic conductor $0.906$
Analytic rank $0$
Dimension $2$
Projective image $D_{6}$
CM discriminant -15
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1815,1,Mod(1574,1815)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1815, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 1, 0]))
 
N = Newforms(chi, 1, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1815.1574");
 
S:= CuspForms(chi, 1);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1815 = 3 \cdot 5 \cdot 11^{2} \)
Weight: \( k \) \(=\) \( 1 \)
Character orbit: \([\chi]\) \(=\) 1815.g (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: \(0.905802997929\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{3}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - 3 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Projective image: \(D_{6}\)
Projective field: Galois closure of 6.0.36236475.1

$q$-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 \(\beta = \sqrt{3}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta q^{2} + q^{3} + 2 q^{4} - q^{5} - \beta q^{6} - \beta q^{8} + q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q - \beta q^{2} + q^{3} + 2 q^{4} - q^{5} - \beta q^{6} - \beta q^{8} + q^{9} + \beta q^{10} + 2 q^{12} - q^{15} + q^{16} + \beta q^{17} - \beta q^{18} - 2 q^{20} - q^{23} - \beta q^{24} + q^{25} + q^{27} + \beta q^{30} - q^{31} - 3 q^{34} + 2 q^{36} + \beta q^{40} - q^{45} + \beta q^{46} + q^{47} + q^{48} + q^{49} - \beta q^{50} + \beta q^{51} + q^{53} - \beta q^{54} - 2 q^{60} + \beta q^{61} + \beta q^{62} - q^{64} + 2 \beta q^{68} - q^{69} - \beta q^{72} + q^{75} - \beta q^{79} - q^{80} + q^{81} - \beta q^{85} + \beta q^{90} - 2 q^{92} - q^{93} - \beta q^{94} - \beta q^{98} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q + 2 q^{3} + 4 q^{4} - 2 q^{5} + 2 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 2 q + 2 q^{3} + 4 q^{4} - 2 q^{5} + 2 q^{9} + 4 q^{12} - 2 q^{15} + 2 q^{16} - 4 q^{20} - 2 q^{23} + 2 q^{25} + 2 q^{27} - 2 q^{31} - 6 q^{34} + 4 q^{36} - 2 q^{45} + 2 q^{47} + 2 q^{48} + 2 q^{49} + 2 q^{53} - 4 q^{60} - 2 q^{64} - 2 q^{69} + 2 q^{75} - 2 q^{80} + 2 q^{81} - 4 q^{92} - 2 q^{93}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1815\mathbb{Z}\right)^\times\).

\(n\) \(727\) \(1211\) \(1696\)
\(\chi(n)\) \(-1\) \(-1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1574.1
1.73205
−1.73205
−1.73205 1.00000 2.00000 −1.00000 −1.73205 0 −1.73205 1.00000 1.73205
1574.2 1.73205 1.00000 2.00000 −1.00000 1.73205 0 1.73205 1.00000 −1.73205
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
15.d odd 2 1 CM by \(\Q(\sqrt{-15}) \)
11.b odd 2 1 inner
165.d even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1815.1.g.h yes 2
3.b odd 2 1 1815.1.g.g 2
5.b even 2 1 1815.1.g.g 2
11.b odd 2 1 inner 1815.1.g.h yes 2
11.c even 5 4 1815.1.o.g 8
11.d odd 10 4 1815.1.o.g 8
15.d odd 2 1 CM 1815.1.g.h yes 2
33.d even 2 1 1815.1.g.g 2
33.f even 10 4 1815.1.o.h 8
33.h odd 10 4 1815.1.o.h 8
55.d odd 2 1 1815.1.g.g 2
55.h odd 10 4 1815.1.o.h 8
55.j even 10 4 1815.1.o.h 8
165.d even 2 1 inner 1815.1.g.h yes 2
165.o odd 10 4 1815.1.o.g 8
165.r even 10 4 1815.1.o.g 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1815.1.g.g 2 3.b odd 2 1
1815.1.g.g 2 5.b even 2 1
1815.1.g.g 2 33.d even 2 1
1815.1.g.g 2 55.d odd 2 1
1815.1.g.h yes 2 1.a even 1 1 trivial
1815.1.g.h yes 2 11.b odd 2 1 inner
1815.1.g.h yes 2 15.d odd 2 1 CM
1815.1.g.h yes 2 165.d even 2 1 inner
1815.1.o.g 8 11.c even 5 4
1815.1.o.g 8 11.d odd 10 4
1815.1.o.g 8 165.o odd 10 4
1815.1.o.g 8 165.r even 10 4
1815.1.o.h 8 33.f even 10 4
1815.1.o.h 8 33.h odd 10 4
1815.1.o.h 8 55.h odd 10 4
1815.1.o.h 8 55.j even 10 4

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{1}^{\mathrm{new}}(1815, [\chi])\):

\( T_{2}^{2} - 3 \) Copy content Toggle raw display
\( T_{19} \) Copy content Toggle raw display
\( T_{23} + 1 \) Copy content Toggle raw display

Hecke characteristic polynomials

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