Properties

Label 1340.2.d.b
Level $1340$
Weight $2$
Character orbit 1340.d
Analytic conductor $10.700$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1340,2,Mod(269,1340)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1340, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 1, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1340.269");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1340 = 2^{2} \cdot 5 \cdot 67 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1340.d (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: no
Analytic conductor: \(10.6999538709\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: \(\mathbb{Q}[x]/(x^{8} + \cdots)\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 14x^{6} + 51x^{4} + 15x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
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.

\(f(q)\) \(=\) \( q + \beta_{6} q^{3} + ( - \beta_{5} + 2) q^{5} + ( - \beta_{6} - \beta_{5} - \beta_1) q^{7} + ( - \beta_{4} - \beta_{2}) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{6} q^{3} + ( - \beta_{5} + 2) q^{5} + ( - \beta_{6} - \beta_{5} - \beta_1) q^{7} + ( - \beta_{4} - \beta_{2}) q^{9} + ( - 2 \beta_{4} + 2 \beta_{3}) q^{11} + ( - \beta_{7} - \beta_{6} + \cdots + \beta_1) q^{13}+ \cdots + (8 \beta_{4} + 4 \beta_{3} + 2 \beta_{2} + 6) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 16 q^{5} - 6 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 16 q^{5} - 6 q^{9} - 4 q^{11} + 2 q^{15} - 6 q^{19} + 40 q^{21} + 24 q^{25} - 2 q^{29} - 4 q^{31} - 10 q^{35} + 16 q^{39} - 8 q^{41} - 12 q^{45} - 30 q^{49} + 8 q^{51} - 8 q^{55} - 2 q^{59} - 6 q^{65} + 40 q^{69} + 2 q^{71} + 8 q^{75} - 12 q^{79} + 48 q^{81} - 32 q^{85} + 14 q^{89} - 8 q^{91} - 12 q^{95} + 72 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 14x^{6} + 51x^{4} + 15x^{2} + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} + 4 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{4} + 7\nu^{2} + 1 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( \nu^{6} + 14\nu^{4} + 50\nu^{2} + 8 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( \nu^{7} + 14\nu^{5} + 50\nu^{3} + 8\nu \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( \nu^{7} + 14\nu^{5} + 51\nu^{3} + 15\nu \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( -4\nu^{7} - 55\nu^{5} - 193\nu^{3} - 31\nu \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} - 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{6} - \beta_{5} - 7\beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{3} - 7\beta_{2} + 27 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( \beta_{7} - 7\beta_{6} + 11\beta_{5} + 48\beta_1 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( \beta_{4} - 14\beta_{3} + 48\beta_{2} - 186 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( -14\beta_{7} + 48\beta_{6} - 103\beta_{5} - 330\beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1340\mathbb{Z}\right)^\times\).

\(n\) \(537\) \(671\) \(1141\)
\(\chi(n)\) \(-1\) \(1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
269.1
0.315051i
0.464643i
2.53994i
2.68953i
2.68953i
2.53994i
0.464643i
0.315051i
0 3.17409i 0 2.00000 + 1.00000i 0 4.48914i 0 −7.07483 0
269.2 0 2.15219i 0 2.00000 1.00000i 0 1.61683i 0 −1.63192 0
269.3 0 0.393711i 0 2.00000 1.00000i 0 1.93365i 0 2.84499 0
269.4 0 0.371812i 0 2.00000 + 1.00000i 0 4.06134i 0 2.86176 0
269.5 0 0.371812i 0 2.00000 1.00000i 0 4.06134i 0 2.86176 0
269.6 0 0.393711i 0 2.00000 + 1.00000i 0 1.93365i 0 2.84499 0
269.7 0 2.15219i 0 2.00000 + 1.00000i 0 1.61683i 0 −1.63192 0
269.8 0 3.17409i 0 2.00000 1.00000i 0 4.48914i 0 −7.07483 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 269.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
5.b even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1340.2.d.b 8
5.b even 2 1 inner 1340.2.d.b 8
5.c odd 4 1 6700.2.a.s 4
5.c odd 4 1 6700.2.a.u 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1340.2.d.b 8 1.a even 1 1 trivial
1340.2.d.b 8 5.b even 2 1 inner
6700.2.a.s 4 5.c odd 4 1
6700.2.a.u 4 5.c odd 4 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{8} + 15T_{3}^{6} + 51T_{3}^{4} + 14T_{3}^{2} + 1 \) acting on \(S_{2}^{\mathrm{new}}(1340, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} + 15 T^{6} + \cdots + 1 \) Copy content Toggle raw display
$5$ \( (T^{2} - 4 T + 5)^{4} \) Copy content Toggle raw display
$7$ \( T^{8} + 43 T^{6} + \cdots + 3249 \) Copy content Toggle raw display
$11$ \( (T^{4} + 2 T^{3} + \cdots + 384)^{2} \) Copy content Toggle raw display
$13$ \( T^{8} + 55 T^{6} + \cdots + 4 \) Copy content Toggle raw display
$17$ \( (T^{2} + 16)^{4} \) Copy content Toggle raw display
$19$ \( (T^{4} + 3 T^{3} - 37 T^{2} + \cdots - 12)^{2} \) Copy content Toggle raw display
$23$ \( T^{8} + 92 T^{6} + \cdots + 92416 \) Copy content Toggle raw display
$29$ \( (T^{4} + T^{3} - 43 T^{2} + \cdots + 369)^{2} \) Copy content Toggle raw display
$31$ \( (T^{4} + 2 T^{3} - 28 T^{2} + 16)^{2} \) Copy content Toggle raw display
$37$ \( T^{8} + 84 T^{6} + \cdots + 147456 \) Copy content Toggle raw display
$41$ \( (T^{4} + 4 T^{3} + \cdots + 864)^{2} \) Copy content Toggle raw display
$43$ \( T^{8} + 159 T^{6} + \cdots + 2209 \) Copy content Toggle raw display
$47$ \( T^{8} + 324 T^{6} + \cdots + 147456 \) Copy content Toggle raw display
$53$ \( T^{8} + 39 T^{6} + \cdots + 5329 \) Copy content Toggle raw display
$59$ \( (T^{4} + T^{3} - 199 T^{2} + \cdots + 8297)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} - 28 T^{2} + \cdots + 16)^{2} \) Copy content Toggle raw display
$67$ \( (T^{2} + 1)^{4} \) Copy content Toggle raw display
$71$ \( (T^{4} - T^{3} - 97 T^{2} + \cdots - 472)^{2} \) Copy content Toggle raw display
$73$ \( T^{8} + 92 T^{6} + \cdots + 92416 \) Copy content Toggle raw display
$79$ \( (T^{4} + 6 T^{3} + \cdots + 128)^{2} \) Copy content Toggle raw display
$83$ \( T^{8} + 240 T^{6} + \cdots + 2304 \) Copy content Toggle raw display
$89$ \( (T^{4} - 7 T^{3} + \cdots + 6241)^{2} \) Copy content Toggle raw display
$97$ \( T^{8} + 295 T^{6} + \cdots + 10310521 \) Copy content Toggle raw display
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