Properties

Label 1890.2.be.d
Level $1890$
Weight $2$
Character orbit 1890.be
Analytic conductor $15.092$
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] = [1890,2,Mod(971,1890)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1890, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([3, 0, 5]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1890.971");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1890 = 2 \cdot 3^{3} \cdot 5 \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1890.be (of order \(6\), degree \(2\), 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: \(15.0917259820\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{6})\)
Coefficient field: \(\Q(\zeta_{24})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{4} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{11}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{6}]$

$q$-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 primitive root of unity \(\zeta_{24}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \zeta_{24}^{2} q^{2} + \zeta_{24}^{4} q^{4} + (\zeta_{24}^{4} - 1) q^{5} + (\zeta_{24}^{7} + 2 \zeta_{24}^{3}) q^{7} + \zeta_{24}^{6} q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + \zeta_{24}^{2} q^{2} + \zeta_{24}^{4} q^{4} + (\zeta_{24}^{4} - 1) q^{5} + (\zeta_{24}^{7} + 2 \zeta_{24}^{3}) q^{7} + \zeta_{24}^{6} q^{8} + (\zeta_{24}^{6} - \zeta_{24}^{2}) q^{10} + ( - \zeta_{24}^{7} - \zeta_{24}^{4} + \cdots + 2) q^{11}+ \cdots + (3 \zeta_{24}^{4} - 8) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 4 q^{4} - 4 q^{5}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 4 q^{4} - 4 q^{5} + 12 q^{11} - 4 q^{16} - 8 q^{20} - 24 q^{23} - 4 q^{25} + 4 q^{26} + 24 q^{31} + 4 q^{38} + 40 q^{41} - 40 q^{43} + 12 q^{44} - 4 q^{46} + 8 q^{47} - 12 q^{52} - 36 q^{53} + 20 q^{58} - 24 q^{61} + 16 q^{62} - 8 q^{64} - 12 q^{65} + 12 q^{73} - 12 q^{74} + 4 q^{77} - 4 q^{80} + 12 q^{82} - 8 q^{83} - 12 q^{86} + 40 q^{89} - 20 q^{91} - 36 q^{94} - 52 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1890\mathbb{Z}\right)^\times\).

\(n\) \(757\) \(1081\) \(1541\)
\(\chi(n)\) \(1\) \(1 - \zeta_{24}^{4}\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
971.1
0.258819 0.965926i
−0.258819 + 0.965926i
−0.965926 0.258819i
0.965926 + 0.258819i
0.258819 + 0.965926i
−0.258819 0.965926i
−0.965926 + 0.258819i
0.965926 0.258819i
−0.866025 0.500000i 0 0.500000 + 0.866025i −0.500000 + 0.866025i 0 −2.38014 + 1.15539i 1.00000i 0 0.866025 0.500000i
971.2 −0.866025 0.500000i 0 0.500000 + 0.866025i −0.500000 + 0.866025i 0 2.38014 1.15539i 1.00000i 0 0.866025 0.500000i
971.3 0.866025 + 0.500000i 0 0.500000 + 0.866025i −0.500000 + 0.866025i 0 −1.15539 2.38014i 1.00000i 0 −0.866025 + 0.500000i
971.4 0.866025 + 0.500000i 0 0.500000 + 0.866025i −0.500000 + 0.866025i 0 1.15539 + 2.38014i 1.00000i 0 −0.866025 + 0.500000i
1781.1 −0.866025 + 0.500000i 0 0.500000 0.866025i −0.500000 0.866025i 0 −2.38014 1.15539i 1.00000i 0 0.866025 + 0.500000i
1781.2 −0.866025 + 0.500000i 0 0.500000 0.866025i −0.500000 0.866025i 0 2.38014 + 1.15539i 1.00000i 0 0.866025 + 0.500000i
1781.3 0.866025 0.500000i 0 0.500000 0.866025i −0.500000 0.866025i 0 −1.15539 + 2.38014i 1.00000i 0 −0.866025 0.500000i
1781.4 0.866025 0.500000i 0 0.500000 0.866025i −0.500000 0.866025i 0 1.15539 2.38014i 1.00000i 0 −0.866025 0.500000i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 971.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
21.g even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1890.2.be.d 8
3.b odd 2 1 1890.2.be.f yes 8
7.d odd 6 1 1890.2.be.f yes 8
21.g even 6 1 inner 1890.2.be.d 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1890.2.be.d 8 1.a even 1 1 trivial
1890.2.be.d 8 21.g even 6 1 inner
1890.2.be.f yes 8 3.b odd 2 1
1890.2.be.f yes 8 7.d odd 6 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{11}^{4} - 6T_{11}^{3} + 13T_{11}^{2} - 6T_{11} + 1 \) acting on \(S_{2}^{\mathrm{new}}(1890, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} - T^{2} + 1)^{2} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( (T^{2} + T + 1)^{4} \) Copy content Toggle raw display
$7$ \( T^{8} + 23T^{4} + 2401 \) Copy content Toggle raw display
$11$ \( (T^{4} - 6 T^{3} + 13 T^{2} + \cdots + 1)^{2} \) Copy content Toggle raw display
$13$ \( T^{8} + 24 T^{6} + \cdots + 64 \) Copy content Toggle raw display
$17$ \( T^{8} + 34 T^{6} + \cdots + 5041 \) Copy content Toggle raw display
$19$ \( T^{8} - 54 T^{6} + \cdots + 2500 \) Copy content Toggle raw display
$23$ \( T^{8} + 24 T^{7} + \cdots + 2116 \) Copy content Toggle raw display
$29$ \( T^{8} + 136 T^{6} + \cdots + 33856 \) Copy content Toggle raw display
$31$ \( T^{8} - 24 T^{7} + \cdots + 256 \) Copy content Toggle raw display
$37$ \( T^{8} + 82 T^{6} + \cdots + 9604 \) Copy content Toggle raw display
$41$ \( (T^{4} - 20 T^{3} + \cdots - 776)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} + 20 T^{3} + \cdots - 2012)^{2} \) Copy content Toggle raw display
$47$ \( T^{8} - 8 T^{7} + \cdots + 111556 \) Copy content Toggle raw display
$53$ \( T^{8} + 36 T^{7} + \cdots + 37249 \) Copy content Toggle raw display
$59$ \( T^{8} + 130 T^{6} + \cdots + 418609 \) Copy content Toggle raw display
$61$ \( T^{8} + 24 T^{7} + \cdots + 160000 \) Copy content Toggle raw display
$67$ \( (T^{4} + 27 T^{2} + 729)^{2} \) Copy content Toggle raw display
$71$ \( T^{8} + 72 T^{6} + \cdots + 9409 \) Copy content Toggle raw display
$73$ \( T^{8} - 12 T^{7} + \cdots + 111556 \) Copy content Toggle raw display
$79$ \( T^{8} + 130 T^{6} + \cdots + 2116 \) Copy content Toggle raw display
$83$ \( (T^{4} + 4 T^{3} + \cdots + 3358)^{2} \) Copy content Toggle raw display
$89$ \( T^{8} - 40 T^{7} + \cdots + 14002564 \) Copy content Toggle raw display
$97$ \( T^{8} + 332 T^{6} + \cdots + 16630084 \) Copy content Toggle raw display
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