Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [14,5,Mod(13,14)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(14, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([1]))
N = Newforms(chi, 5, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("14.13");
S:= CuspForms(chi, 5);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 14 = 2 \cdot 7 \) |
| Weight: | \( k \) | \(=\) | \( 5 \) |
| Character orbit: | \([\chi]\) | \(=\) | 14.b (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: | \(1.44717948317\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | 4.0.1308672.3 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} + 72x^{2} + 1278 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 2^{4} \) |
| 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 \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.
Basis of coefficient ring in terms of a root \(\nu\) of
\( x^{4} + 72x^{2} + 1278 \)
:
| \(\beta_{1}\) | \(=\) |
\( 2\nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( 2\nu^{2} + 72 ) / 3 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( 4\nu^{3} + 144\nu ) / 3 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_1 ) / 2 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( 3\beta_{2} - 72 ) / 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( 3\beta_{3} - 72\beta_1 ) / 4 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/14\mathbb{Z}\right)^\times\).
| \(n\) | \(3\) |
| \(\chi(n)\) | \(-1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 13.1 |
|
−2.82843 | − | 12.6874i | 8.00000 | − | 23.1980i | 35.8854i | 6.45584 | + | 48.5729i | −22.6274 | −79.9706 | 65.6139i | ||||||||||||||||||||||||||
| 13.2 | −2.82843 | 12.6874i | 8.00000 | 23.1980i | − | 35.8854i | 6.45584 | − | 48.5729i | −22.6274 | −79.9706 | − | 65.6139i | |||||||||||||||||||||||||||
| 13.3 | 2.82843 | − | 11.2707i | 8.00000 | 43.1492i | − | 31.8784i | −44.4558 | − | 20.6077i | 22.6274 | −46.0294 | 122.044i | |||||||||||||||||||||||||||
| 13.4 | 2.82843 | 11.2707i | 8.00000 | − | 43.1492i | 31.8784i | −44.4558 | + | 20.6077i | 22.6274 | −46.0294 | − | 122.044i | |||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 7.b | odd | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 14.5.b.a | ✓ | 4 |
| 3.b | odd | 2 | 1 | 126.5.c.a | 4 | ||
| 4.b | odd | 2 | 1 | 112.5.c.c | 4 | ||
| 5.b | even | 2 | 1 | 350.5.b.a | 4 | ||
| 5.c | odd | 4 | 2 | 350.5.d.a | 8 | ||
| 7.b | odd | 2 | 1 | inner | 14.5.b.a | ✓ | 4 |
| 7.c | even | 3 | 2 | 98.5.d.d | 8 | ||
| 7.d | odd | 6 | 2 | 98.5.d.d | 8 | ||
| 8.b | even | 2 | 1 | 448.5.c.e | 4 | ||
| 8.d | odd | 2 | 1 | 448.5.c.f | 4 | ||
| 12.b | even | 2 | 1 | 1008.5.f.h | 4 | ||
| 21.c | even | 2 | 1 | 126.5.c.a | 4 | ||
| 28.d | even | 2 | 1 | 112.5.c.c | 4 | ||
| 35.c | odd | 2 | 1 | 350.5.b.a | 4 | ||
| 35.f | even | 4 | 2 | 350.5.d.a | 8 | ||
| 56.e | even | 2 | 1 | 448.5.c.f | 4 | ||
| 56.h | odd | 2 | 1 | 448.5.c.e | 4 | ||
| 84.h | odd | 2 | 1 | 1008.5.f.h | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 14.5.b.a | ✓ | 4 | 1.a | even | 1 | 1 | trivial |
| 14.5.b.a | ✓ | 4 | 7.b | odd | 2 | 1 | inner |
| 98.5.d.d | 8 | 7.c | even | 3 | 2 | ||
| 98.5.d.d | 8 | 7.d | odd | 6 | 2 | ||
| 112.5.c.c | 4 | 4.b | odd | 2 | 1 | ||
| 112.5.c.c | 4 | 28.d | even | 2 | 1 | ||
| 126.5.c.a | 4 | 3.b | odd | 2 | 1 | ||
| 126.5.c.a | 4 | 21.c | even | 2 | 1 | ||
| 350.5.b.a | 4 | 5.b | even | 2 | 1 | ||
| 350.5.b.a | 4 | 35.c | odd | 2 | 1 | ||
| 350.5.d.a | 8 | 5.c | odd | 4 | 2 | ||
| 350.5.d.a | 8 | 35.f | even | 4 | 2 | ||
| 448.5.c.e | 4 | 8.b | even | 2 | 1 | ||
| 448.5.c.e | 4 | 56.h | odd | 2 | 1 | ||
| 448.5.c.f | 4 | 8.d | odd | 2 | 1 | ||
| 448.5.c.f | 4 | 56.e | even | 2 | 1 | ||
| 1008.5.f.h | 4 | 12.b | even | 2 | 1 | ||
| 1008.5.f.h | 4 | 84.h | odd | 2 | 1 | ||
Hecke kernels
This newform subspace is the entire newspace \(S_{5}^{\mathrm{new}}(14, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{2} - 8)^{2} \)
|
| $3$ |
\( T^{4} + 288 T^{2} + 20448 \)
|
| $5$ |
\( T^{4} + 2400 T^{2} + 1001952 \)
|
| $7$ |
\( T^{4} + 76 T^{3} + \cdots + 5764801 \)
|
| $11$ |
\( (T^{2} - 180 T - 2268)^{2} \)
|
| $13$ |
\( T^{4} + 2784 T^{2} + 1001952 \)
|
| $17$ |
\( T^{4} + \cdots + 2769149952 \)
|
| $19$ |
\( T^{4} + \cdots + 3940759008 \)
|
| $23$ |
\( (T^{2} + 396 T - 34524)^{2} \)
|
| $29$ |
\( (T^{2} - 612 T - 322236)^{2} \)
|
| $31$ |
\( T^{4} + \cdots + 137379151872 \)
|
| $37$ |
\( (T^{2} + 1948 T + 855364)^{2} \)
|
| $41$ |
\( T^{4} + \cdots + 2977977687552 \)
|
| $43$ |
\( (T^{2} - 1844 T - 186716)^{2} \)
|
| $47$ |
\( T^{4} + \cdots + 299010613248 \)
|
| $53$ |
\( (T^{2} - 2916 T - 6394428)^{2} \)
|
| $59$ |
\( T^{4} + \cdots + 8158764780000 \)
|
| $61$ |
\( T^{4} + \cdots + 1641231749088 \)
|
| $67$ |
\( (T^{2} + 524 T - 594908)^{2} \)
|
| $71$ |
\( (T^{2} + 10764 T + 19321092)^{2} \)
|
| $73$ |
\( T^{4} + \cdots + 5086562360832 \)
|
| $79$ |
\( (T^{2} - 6388 T - 4378364)^{2} \)
|
| $83$ |
\( T^{4} + \cdots + 123161511902688 \)
|
| $89$ |
\( T^{4} + \cdots + 79956812938752 \)
|
| $97$ |
\( T^{4} + \cdots + 58\!\cdots\!52 \)
|
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