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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [1386,2,Mod(89,1386)] mf = mfinit([N,k,chi],0) lf = mfeigenbasis(mf)
 
Copy content magma:// Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code chi := DirichletCharacter("1386.89"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(1386, base_ring=CyclotomicField(6)) chi = DirichletCharacter(H, H._module([3, 5, 0])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 1386 = 2 \cdot 3^{2} \cdot 7 \cdot 11 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1386.r (of order \(6\), degree \(2\), minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [8,0,0,4,8] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(5)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(11.0672657201\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{6})\)
Coefficient field: \(\Q(\zeta_{24})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{4} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{6}]$

$q$-expansion

Copy content comment:q-expansion
 
Copy content sage:f.q_expansion() # note that sage often uses an isomorphic number field
 
Copy content 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.

\(f(q)\) \(=\) \( q - \zeta_{24}^{2} q^{2} + \zeta_{24}^{4} q^{4} + ( - \zeta_{24}^{7} - \zeta_{24}^{5} + \cdots + 2) q^{5} + (\zeta_{24}^{5} + 2 \zeta_{24}) q^{7} - \zeta_{24}^{6} q^{8} + (\zeta_{24}^{7} + 2 \zeta_{24}^{6} + \cdots - \zeta_{24}) q^{10} + \cdots + ( - 8 \zeta_{24}^{4} + 5) q^{98} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 4 q^{4} + 8 q^{5} - 4 q^{16} - 4 q^{17} + 24 q^{19} + 16 q^{20} + 8 q^{22} + 24 q^{23} - 4 q^{25} + 12 q^{31} + 16 q^{35} + 12 q^{37} - 8 q^{38} + 16 q^{41} - 32 q^{43} + 8 q^{46} + 48 q^{53} - 4 q^{58}+ \cdots + 8 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1386\mathbb{Z}\right)^\times\).

\(n\) \(155\) \(199\) \(1135\)
\(\chi(n)\) \(-1\) \(1 - \zeta_{24}^{4}\) \(1\)

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.

Copy content comment:embeddings in the coefficient field
 
Copy content gp:mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
89.1
−0.965926 − 0.258819i
0.965926 + 0.258819i
−0.258819 + 0.965926i
0.258819 − 0.965926i
−0.965926 + 0.258819i
0.965926 − 0.258819i
−0.258819 − 0.965926i
0.258819 + 0.965926i
−0.866025 − 0.500000i 0 0.500000 + 0.866025i 0.0340742 − 0.0590182i 0 −2.19067 − 1.48356i − 1.00000i 0 −0.0590182 + 0.0340742i
89.2 −0.866025 − 0.500000i 0 0.500000 + 0.866025i 1.96593 − 3.40508i 0 2.19067 + 1.48356i − 1.00000i 0 −3.40508 + 1.96593i
89.3 0.866025 + 0.500000i 0 0.500000 + 0.866025i 0.741181 − 1.28376i 0 −1.48356 + 2.19067i 1.00000i 0 1.28376 − 0.741181i
89.4 0.866025 + 0.500000i 0 0.500000 + 0.866025i 1.25882 − 2.18034i 0 1.48356 − 2.19067i 1.00000i 0 2.18034 − 1.25882i
1277.1 −0.866025 + 0.500000i 0 0.500000 − 0.866025i 0.0340742 + 0.0590182i 0 −2.19067 + 1.48356i 1.00000i 0 −0.0590182 − 0.0340742i
1277.2 −0.866025 + 0.500000i 0 0.500000 − 0.866025i 1.96593 + 3.40508i 0 2.19067 − 1.48356i 1.00000i 0 −3.40508 − 1.96593i
1277.3 0.866025 − 0.500000i 0 0.500000 − 0.866025i 0.741181 + 1.28376i 0 −1.48356 − 2.19067i − 1.00000i 0 1.28376 + 0.741181i
1277.4 0.866025 − 0.500000i 0 0.500000 − 0.866025i 1.25882 + 2.18034i 0 1.48356 + 2.19067i − 1.00000i 0 2.18034 + 1.25882i
\(n\): e.g. 2-40 or 80-90
Embeddings: e.g. 1-3 or 89.4
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 1386.2.r.c yes 8
3.b odd 2 1 1386.2.r.a ✓ 8
7.d odd 6 1 1386.2.r.a ✓ 8
21.g even 6 1 inner 1386.2.r.c yes 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1386.2.r.a ✓ 8 3.b odd 2 1
1386.2.r.a ✓ 8 7.d odd 6 1
1386.2.r.c yes 8 1.a even 1 1 trivial
1386.2.r.c yes 8 21.g even 6 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{8} - 8T_{5}^{7} + 44T_{5}^{6} - 128T_{5}^{5} + 271T_{5}^{4} - 304T_{5}^{3} + 236T_{5}^{2} - 16T_{5} + 1 \) acting on \(S_{2}^{\mathrm{new}}(1386, [\chi])\). 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
$5$ \( T^{8} - 8 T^{7} + \cdots + 1 \) Copy content Toggle raw display
$7$ \( T^{8} + 71T^{4} + 2401 \) Copy content Toggle raw display
$11$ \( (T^{4} - T^{2} + 1)^{2} \) Copy content Toggle raw display
$13$ \( (T^{2} + 6)^{4} \) Copy content Toggle raw display
$17$ \( T^{8} + 4 T^{7} + \cdots + 529 \) Copy content Toggle raw display
$19$ \( T^{8} - 24 T^{7} + \cdots + 1290496 \) Copy content Toggle raw display
$23$ \( T^{8} - 24 T^{7} + \cdots + 2209 \) Copy content Toggle raw display
$29$ \( T^{8} + 144 T^{6} + \cdots + 10000 \) Copy content Toggle raw display
$31$ \( T^{8} - 12 T^{7} + \cdots + 16 \) Copy content Toggle raw display
$37$ \( T^{8} - 12 T^{7} + \cdots + 5740816 \) Copy content Toggle raw display
$41$ \( (T^{4} - 8 T^{3} + \cdots + 577)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} + 16 T^{3} + \cdots - 3644)^{2} \) Copy content Toggle raw display
$47$ \( T^{8} + 76 T^{6} + \cdots + 14641 \) Copy content Toggle raw display
$53$ \( T^{8} - 48 T^{7} + \cdots + 85264 \) Copy content Toggle raw display
$59$ \( T^{8} - 16 T^{7} + \cdots + 8464 \) Copy content Toggle raw display
$61$ \( T^{8} - 180 T^{6} + \cdots + 38651089 \) Copy content Toggle raw display
$67$ \( T^{8} + 24 T^{7} + \cdots + 3150625 \) Copy content Toggle raw display
$71$ \( T^{8} + 552 T^{6} + \cdots + 18696976 \) Copy content Toggle raw display
$73$ \( T^{8} + 24 T^{7} + \cdots + 3671056 \) Copy content Toggle raw display
$79$ \( T^{8} - 40 T^{7} + \cdots + 56806369 \) Copy content Toggle raw display
$83$ \( (T^{4} - 36 T^{3} + \cdots - 15111)^{2} \) Copy content Toggle raw display
$89$ \( T^{8} + 16 T^{7} + \cdots + 3341584 \) Copy content Toggle raw display
$97$ \( T^{8} + 324 T^{6} + \cdots + 2070721 \) Copy content Toggle raw display
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