Properties

Label 2240.2.k.e
Level $2240$
Weight $2$
Character orbit 2240.k
Analytic conductor $17.886$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [2240,2,Mod(1791,2240)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2240, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 0, 0, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2240.1791");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2240 = 2^{6} \cdot 5 \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 2240.k (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: \(17.8864900528\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.342102016.5
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + x^{6} + 4x^{4} + 4x^{2} + 16 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{4} \)
Twist minimal: no (minimal twist has level 140)
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-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 a basis \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + ( - \beta_{5} - \beta_{2}) q^{3} + \beta_1 q^{5} + ( - \beta_{5} - \beta_{3} - \beta_{2}) q^{7} + ( - \beta_{7} + \beta_{6} - \beta_1 + 3) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - \beta_{5} - \beta_{2}) q^{3} + \beta_1 q^{5} + ( - \beta_{5} - \beta_{3} - \beta_{2}) q^{7} + ( - \beta_{7} + \beta_{6} - \beta_1 + 3) q^{9} + ( - \beta_{5} - \beta_{4} + \cdots + \beta_{2}) q^{11}+ \cdots + ( - \beta_{5} - 9 \beta_{4} + \cdots + \beta_{2}) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 16 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 16 q^{9} + 36 q^{21} - 8 q^{25} + 16 q^{29} - 16 q^{37} + 36 q^{49} - 16 q^{53} - 48 q^{57} - 16 q^{65} - 24 q^{77} + 48 q^{81} - 24 q^{85} + 16 q^{93}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + x^{6} + 4x^{4} + 4x^{2} + 16 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( -\nu^{7} + \nu^{5} + 2\nu^{3} ) / 16 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -\nu^{7} + \nu^{6} - 3\nu^{5} - 5\nu^{4} - 2\nu^{3} + 2\nu^{2} - 8 ) / 16 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{7} + \nu^{6} - \nu^{5} + 3\nu^{4} + 6\nu^{3} + 10\nu^{2} - 8\nu + 8 ) / 16 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -\nu^{7} + \nu^{6} + \nu^{5} + 3\nu^{4} - 6\nu^{3} + 10\nu^{2} + 8\nu + 8 ) / 16 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -\nu^{7} - \nu^{6} - 3\nu^{5} + 5\nu^{4} - 2\nu^{3} - 2\nu^{2} + 8 ) / 16 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( \nu^{7} - 4\nu^{6} + 3\nu^{5} - 4\nu^{4} + 10\nu^{3} + 24\nu - 16 ) / 16 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{7} + 2\nu^{6} + \nu^{5} + 2\nu^{4} + 4\nu^{3} + 12\nu + 8 ) / 8 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{7} + \beta_{6} + \beta_{5} + \beta_{4} - \beta_{3} + \beta_{2} - \beta_1 ) / 4 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( -\beta_{7} + \beta_{6} - \beta_{5} + 3\beta_{4} + 3\beta_{3} + \beta_{2} - \beta_1 ) / 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( \beta_{7} + \beta_{6} + \beta_{5} - 3\beta_{4} + 3\beta_{3} + \beta_{2} + 7\beta_1 ) / 4 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( \beta_{7} - \beta_{6} + 5\beta_{5} + \beta_{4} + \beta_{3} - 5\beta_{2} + \beta _1 - 8 ) / 4 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -\beta_{7} - \beta_{6} - 9\beta_{5} + 3\beta_{4} - 3\beta_{3} - 9\beta_{2} + 9\beta_1 ) / 4 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( 7\beta_{7} - 7\beta_{6} - 5\beta_{5} - \beta_{4} - \beta_{3} + 5\beta_{2} + 7\beta _1 - 8 ) / 4 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( \beta_{7} + \beta_{6} - 7\beta_{5} - 3\beta_{4} + 3\beta_{3} - 7\beta_{2} - 41\beta_1 ) / 4 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2240\mathbb{Z}\right)^\times\).

\(n\) \(897\) \(1471\) \(1541\) \(1921\)
\(\chi(n)\) \(1\) \(-1\) \(1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1791.1
1.17915 0.780776i
1.17915 + 0.780776i
−0.599676 + 1.28078i
−0.599676 1.28078i
0.599676 + 1.28078i
0.599676 1.28078i
−1.17915 0.780776i
−1.17915 + 0.780776i
0 −3.02045 0 1.00000i 0 −2.17238 + 1.51022i 0 6.12311 0
1791.2 0 −3.02045 0 1.00000i 0 −2.17238 1.51022i 0 6.12311 0
1791.3 0 −0.936426 0 1.00000i 0 −2.60399 + 0.468213i 0 −2.12311 0
1791.4 0 −0.936426 0 1.00000i 0 −2.60399 0.468213i 0 −2.12311 0
1791.5 0 0.936426 0 1.00000i 0 2.60399 0.468213i 0 −2.12311 0
1791.6 0 0.936426 0 1.00000i 0 2.60399 + 0.468213i 0 −2.12311 0
1791.7 0 3.02045 0 1.00000i 0 2.17238 1.51022i 0 6.12311 0
1791.8 0 3.02045 0 1.00000i 0 2.17238 + 1.51022i 0 6.12311 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 1791.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 inner
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 2240.2.k.e 8
4.b odd 2 1 inner 2240.2.k.e 8
7.b odd 2 1 inner 2240.2.k.e 8
8.b even 2 1 140.2.g.c 8
8.d odd 2 1 140.2.g.c 8
24.f even 2 1 1260.2.c.c 8
24.h odd 2 1 1260.2.c.c 8
28.d even 2 1 inner 2240.2.k.e 8
40.e odd 2 1 700.2.g.j 8
40.f even 2 1 700.2.g.j 8
40.i odd 4 1 700.2.c.i 8
40.i odd 4 1 700.2.c.j 8
40.k even 4 1 700.2.c.i 8
40.k even 4 1 700.2.c.j 8
56.e even 2 1 140.2.g.c 8
56.h odd 2 1 140.2.g.c 8
56.j odd 6 2 980.2.o.e 16
56.k odd 6 2 980.2.o.e 16
56.m even 6 2 980.2.o.e 16
56.p even 6 2 980.2.o.e 16
168.e odd 2 1 1260.2.c.c 8
168.i even 2 1 1260.2.c.c 8
280.c odd 2 1 700.2.g.j 8
280.n even 2 1 700.2.g.j 8
280.s even 4 1 700.2.c.i 8
280.s even 4 1 700.2.c.j 8
280.y odd 4 1 700.2.c.i 8
280.y odd 4 1 700.2.c.j 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
140.2.g.c 8 8.b even 2 1
140.2.g.c 8 8.d odd 2 1
140.2.g.c 8 56.e even 2 1
140.2.g.c 8 56.h odd 2 1
700.2.c.i 8 40.i odd 4 1
700.2.c.i 8 40.k even 4 1
700.2.c.i 8 280.s even 4 1
700.2.c.i 8 280.y odd 4 1
700.2.c.j 8 40.i odd 4 1
700.2.c.j 8 40.k even 4 1
700.2.c.j 8 280.s even 4 1
700.2.c.j 8 280.y odd 4 1
700.2.g.j 8 40.e odd 2 1
700.2.g.j 8 40.f even 2 1
700.2.g.j 8 280.c odd 2 1
700.2.g.j 8 280.n even 2 1
980.2.o.e 16 56.j odd 6 2
980.2.o.e 16 56.k odd 6 2
980.2.o.e 16 56.m even 6 2
980.2.o.e 16 56.p even 6 2
1260.2.c.c 8 24.f even 2 1
1260.2.c.c 8 24.h odd 2 1
1260.2.c.c 8 168.e odd 2 1
1260.2.c.c 8 168.i even 2 1
2240.2.k.e 8 1.a even 1 1 trivial
2240.2.k.e 8 4.b odd 2 1 inner
2240.2.k.e 8 7.b odd 2 1 inner
2240.2.k.e 8 28.d even 2 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(2240, [\chi])\):

\( T_{3}^{4} - 10T_{3}^{2} + 8 \) Copy content Toggle raw display
\( T_{19}^{4} - 28T_{19}^{2} + 128 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( (T^{4} - 10 T^{2} + 8)^{2} \) Copy content Toggle raw display
$5$ \( (T^{2} + 1)^{4} \) Copy content Toggle raw display
$7$ \( T^{8} - 18 T^{6} + \cdots + 2401 \) Copy content Toggle raw display
$11$ \( (T^{4} + 28 T^{2} + 128)^{2} \) Copy content Toggle raw display
$13$ \( (T^{2} + 4)^{4} \) Copy content Toggle raw display
$17$ \( (T^{4} + 52 T^{2} + 64)^{2} \) Copy content Toggle raw display
$19$ \( (T^{4} - 28 T^{2} + 128)^{2} \) Copy content Toggle raw display
$23$ \( (T^{4} + 74 T^{2} + 1352)^{2} \) Copy content Toggle raw display
$29$ \( (T - 2)^{8} \) Copy content Toggle raw display
$31$ \( (T^{4} - 56 T^{2} + 512)^{2} \) Copy content Toggle raw display
$37$ \( (T + 2)^{8} \) Copy content Toggle raw display
$41$ \( (T^{4} + 52 T^{2} + 64)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} + 58 T^{2} + 8)^{2} \) Copy content Toggle raw display
$47$ \( (T^{4} - 126 T^{2} + 2592)^{2} \) Copy content Toggle raw display
$53$ \( (T + 2)^{8} \) Copy content Toggle raw display
$59$ \( (T^{4} - 124 T^{2} + 512)^{2} \) Copy content Toggle raw display
$61$ \( (T^{2} + 4)^{4} \) Copy content Toggle raw display
$67$ \( (T^{4} + 218 T^{2} + 2888)^{2} \) Copy content Toggle raw display
$71$ \( (T^{4} + 92 T^{2} + 2048)^{2} \) Copy content Toggle raw display
$73$ \( (T^{4} + 324 T^{2} + 20736)^{2} \) Copy content Toggle raw display
$79$ \( (T^{4} + 20 T^{2} + 32)^{2} \) Copy content Toggle raw display
$83$ \( (T^{4} - 10 T^{2} + 8)^{2} \) Copy content Toggle raw display
$89$ \( (T^{2} + 144)^{4} \) Copy content Toggle raw display
$97$ \( (T^{4} + 52 T^{2} + 64)^{2} \) Copy content Toggle raw display
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