Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [147,5,Mod(19,147)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(147, base_ring=CyclotomicField(6))
chi = DirichletCharacter(H, H._module([0, 5]))
N = Newforms(chi, 5, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("147.19");
S:= CuspForms(chi, 5);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 147 = 3 \cdot 7^{2} \) |
| Weight: | \( k \) | \(=\) | \( 5 \) |
| Character orbit: | \([\chi]\) | \(=\) | 147.f (of order \(6\), degree \(2\), 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: | \(15.1953845733\) |
| 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: |
\( x^{2} - x + 1 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 21) |
| 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 \(\zeta_{6}\). We also show the integral \(q\)-expansion of the trace form.
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/147\mathbb{Z}\right)^\times\).
| \(n\) | \(50\) | \(52\) |
| \(\chi(n)\) | \(1\) | \(\zeta_{6}\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 19.1 |
|
−1.00000 | + | 1.73205i | −4.50000 | + | 2.59808i | 6.00000 | + | 10.3923i | −9.00000 | − | 5.19615i | − | 10.3923i | 0 | −56.0000 | 13.5000 | − | 23.3827i | 18.0000 | − | 10.3923i | |||||||||||
| 31.1 | −1.00000 | − | 1.73205i | −4.50000 | − | 2.59808i | 6.00000 | − | 10.3923i | −9.00000 | + | 5.19615i | 10.3923i | 0 | −56.0000 | 13.5000 | + | 23.3827i | 18.0000 | + | 10.3923i | |||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 7.d | odd | 6 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 147.5.f.a | 2 | |
| 7.b | odd | 2 | 1 | 21.5.f.a | ✓ | 2 | |
| 7.c | even | 3 | 1 | 21.5.f.a | ✓ | 2 | |
| 7.c | even | 3 | 1 | 147.5.d.b | 2 | ||
| 7.d | odd | 6 | 1 | 147.5.d.b | 2 | ||
| 7.d | odd | 6 | 1 | inner | 147.5.f.a | 2 | |
| 21.c | even | 2 | 1 | 63.5.m.c | 2 | ||
| 21.g | even | 6 | 1 | 441.5.d.a | 2 | ||
| 21.h | odd | 6 | 1 | 63.5.m.c | 2 | ||
| 21.h | odd | 6 | 1 | 441.5.d.a | 2 | ||
| 28.d | even | 2 | 1 | 336.5.bh.b | 2 | ||
| 28.g | odd | 6 | 1 | 336.5.bh.b | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 21.5.f.a | ✓ | 2 | 7.b | odd | 2 | 1 | |
| 21.5.f.a | ✓ | 2 | 7.c | even | 3 | 1 | |
| 63.5.m.c | 2 | 21.c | even | 2 | 1 | ||
| 63.5.m.c | 2 | 21.h | odd | 6 | 1 | ||
| 147.5.d.b | 2 | 7.c | even | 3 | 1 | ||
| 147.5.d.b | 2 | 7.d | odd | 6 | 1 | ||
| 147.5.f.a | 2 | 1.a | even | 1 | 1 | trivial | |
| 147.5.f.a | 2 | 7.d | odd | 6 | 1 | inner | |
| 336.5.bh.b | 2 | 28.d | even | 2 | 1 | ||
| 336.5.bh.b | 2 | 28.g | odd | 6 | 1 | ||
| 441.5.d.a | 2 | 21.g | even | 6 | 1 | ||
| 441.5.d.a | 2 | 21.h | odd | 6 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{5}^{\mathrm{new}}(147, [\chi])\):
|
\( T_{2}^{2} + 2T_{2} + 4 \)
|
|
\( T_{5}^{2} + 18T_{5} + 108 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} + 2T + 4 \)
|
| $3$ |
\( T^{2} + 9T + 27 \)
|
| $5$ |
\( T^{2} + 18T + 108 \)
|
| $7$ |
\( T^{2} \)
|
| $11$ |
\( T^{2} + 194T + 37636 \)
|
| $13$ |
\( T^{2} + 27075 \)
|
| $17$ |
\( T^{2} - 420T + 58800 \)
|
| $19$ |
\( T^{2} + 453T + 68403 \)
|
| $23$ |
\( T^{2} - 112T + 12544 \)
|
| $29$ |
\( (T - 1040)^{2} \)
|
| $31$ |
\( T^{2} - 2019 T + 1358787 \)
|
| $37$ |
\( T^{2} - 1075 T + 1155625 \)
|
| $41$ |
\( T^{2} + 1705548 \)
|
| $43$ |
\( (T + 1087)^{2} \)
|
| $47$ |
\( T^{2} + 3750 T + 4687500 \)
|
| $53$ |
\( T^{2} - 2200 T + 4840000 \)
|
| $59$ |
\( T^{2} - 9264 T + 28607232 \)
|
| $61$ |
\( T^{2} + 1212 T + 489648 \)
|
| $67$ |
\( T^{2} + 2375 T + 5640625 \)
|
| $71$ |
\( (T + 8938)^{2} \)
|
| $73$ |
\( T^{2} + 15807 T + 83287083 \)
|
| $79$ |
\( T^{2} + 8147 T + 66373609 \)
|
| $83$ |
\( T^{2} + 44559948 \)
|
| $89$ |
\( T^{2} + 23628 T + 186094128 \)
|
| $97$ |
\( T^{2} + 12241200 \)
|
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