Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [430,2,Mod(259,430)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(430, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([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("430.259");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 430 = 2 \cdot 5 \cdot 43 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 430.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: | \(3.43356728692\) |
| Analytic rank: | \(0\) |
| Dimension: | \(6\) |
| Coefficient field: | 6.0.350464.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{6} - 2x^{5} + 2x^{4} + 2x^{3} + 4x^{2} - 4x + 2 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 2 \) |
| 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 \(1,\beta_1,\ldots,\beta_{5}\) 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
\( x^{6} - 2x^{5} + 2x^{4} + 2x^{3} + 4x^{2} - 4x + 2 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( -\nu^{5} + 8\nu^{4} - 4\nu^{3} - \nu^{2} + 2\nu + 38 ) / 23 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( -5\nu^{5} + 17\nu^{4} - 20\nu^{3} - 5\nu^{2} + 10\nu + 29 ) / 23 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( 7\nu^{5} - 10\nu^{4} + 5\nu^{3} + 30\nu^{2} + 32\nu - 13 ) / 23 \)
|
| \(\beta_{4}\) | \(=\) |
\( ( -11\nu^{5} + 19\nu^{4} - 21\nu^{3} - 11\nu^{2} - 70\nu + 27 ) / 23 \)
|
| \(\beta_{5}\) | \(=\) |
\( ( -14\nu^{5} + 20\nu^{4} - 10\nu^{3} - 37\nu^{2} - 64\nu + 26 ) / 23 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{5} - \beta_{4} + \beta_{3} + \beta_{2} - \beta _1 + 1 ) / 2 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{5} + 2\beta_{3} \)
|
| \(\nu^{3}\) | \(=\) |
\( 2\beta_{5} - \beta_{4} + 2\beta_{3} - \beta_{2} + 2\beta _1 - 2 \)
|
| \(\nu^{4}\) | \(=\) |
\( -\beta_{2} + 5\beta _1 - 7 \)
|
| \(\nu^{5}\) | \(=\) |
\( -8\beta_{5} + 3\beta_{4} - 9\beta_{3} - 3\beta_{2} + 8\beta _1 - 9 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/430\mathbb{Z}\right)^\times\).
| \(n\) | \(87\) | \(261\) |
| \(\chi(n)\) | \(-1\) | \(1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 259.1 |
|
− | 1.00000i | − | 2.48119i | −1.00000 | −1.48119 | − | 1.67513i | −2.48119 | 0.193937i | 1.00000i | −3.15633 | −1.67513 | + | 1.48119i | ||||||||||||||||||||||||||||||
| 259.2 | − | 1.00000i | − | 0.688892i | −1.00000 | 0.311108 | + | 2.21432i | −0.688892 | − | 1.90321i | 1.00000i | 2.52543 | 2.21432 | − | 0.311108i | ||||||||||||||||||||||||||||||
| 259.3 | − | 1.00000i | 1.17009i | −1.00000 | 2.17009 | − | 0.539189i | 1.17009 | 2.70928i | 1.00000i | 1.63090 | −0.539189 | − | 2.17009i | ||||||||||||||||||||||||||||||||
| 259.4 | 1.00000i | − | 1.17009i | −1.00000 | 2.17009 | + | 0.539189i | 1.17009 | − | 2.70928i | − | 1.00000i | 1.63090 | −0.539189 | + | 2.17009i | ||||||||||||||||||||||||||||||
| 259.5 | 1.00000i | 0.688892i | −1.00000 | 0.311108 | − | 2.21432i | −0.688892 | 1.90321i | − | 1.00000i | 2.52543 | 2.21432 | + | 0.311108i | ||||||||||||||||||||||||||||||||
| 259.6 | 1.00000i | 2.48119i | −1.00000 | −1.48119 | + | 1.67513i | −2.48119 | − | 0.193937i | − | 1.00000i | −3.15633 | −1.67513 | − | 1.48119i | |||||||||||||||||||||||||||||||
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 | 430.2.b.a | ✓ | 6 |
| 5.b | even | 2 | 1 | inner | 430.2.b.a | ✓ | 6 |
| 5.c | odd | 4 | 1 | 2150.2.a.bc | 3 | ||
| 5.c | odd | 4 | 1 | 2150.2.a.bd | 3 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 430.2.b.a | ✓ | 6 | 1.a | even | 1 | 1 | trivial |
| 430.2.b.a | ✓ | 6 | 5.b | even | 2 | 1 | inner |
| 2150.2.a.bc | 3 | 5.c | odd | 4 | 1 | ||
| 2150.2.a.bd | 3 | 5.c | odd | 4 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{6} + 8T_{3}^{4} + 12T_{3}^{2} + 4 \)
acting on \(S_{2}^{\mathrm{new}}(430, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{2} + 1)^{3} \)
|
| $3$ |
\( T^{6} + 8 T^{4} + \cdots + 4 \)
|
| $5$ |
\( T^{6} - 2 T^{5} + \cdots + 125 \)
|
| $7$ |
\( T^{6} + 11 T^{4} + \cdots + 1 \)
|
| $11$ |
\( (T^{3} + 6 T^{2} + 8 T - 2)^{2} \)
|
| $13$ |
\( T^{6} + 35 T^{4} + \cdots + 1 \)
|
| $17$ |
\( T^{6} + 60 T^{4} + \cdots + 4 \)
|
| $19$ |
\( (T^{3} - 17 T^{2} + \cdots - 151)^{2} \)
|
| $23$ |
\( T^{6} + 20 T^{4} + \cdots + 4 \)
|
| $29$ |
\( (T^{3} - 5 T^{2} - 5 T - 1)^{2} \)
|
| $31$ |
\( (T^{3} + 9 T^{2} + \cdots - 135)^{2} \)
|
| $37$ |
\( T^{6} + 140 T^{4} + \cdots + 14884 \)
|
| $41$ |
\( (T^{3} + 5 T^{2} + \cdots - 185)^{2} \)
|
| $43$ |
\( (T^{2} + 1)^{3} \)
|
| $47$ |
\( T^{6} + 112 T^{4} + \cdots + 3844 \)
|
| $53$ |
\( T^{6} + 180 T^{4} + \cdots + 183184 \)
|
| $59$ |
\( (T^{3} + 20 T^{2} + \cdots - 272)^{2} \)
|
| $61$ |
\( (T^{3} + 21 T^{2} + \cdots - 233)^{2} \)
|
| $67$ |
\( T^{6} + 315 T^{4} + \cdots + 210681 \)
|
| $71$ |
\( (T^{3} + 8 T^{2} + \cdots - 206)^{2} \)
|
| $73$ |
\( T^{6} + 387 T^{4} + \cdots + 703921 \)
|
| $79$ |
\( (T^{3} - 9 T^{2} - 3 T + 61)^{2} \)
|
| $83$ |
\( T^{6} + 532 T^{4} + \cdots + 3341584 \)
|
| $89$ |
\( (T^{3} - 14 T^{2} + \cdots + 3778)^{2} \)
|
| $97$ |
\( T^{6} + 72 T^{4} + \cdots + 2916 \)
|
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