Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [1911,2,Mod(883,1911)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1911, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 1]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("1911.883");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 1911 = 3 \cdot 7^{2} \cdot 13 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1911.c (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: | \(15.2594118263\) |
| 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: | \(\Z[a_1, \ldots, a_{13}]\) |
| Coefficient ring index: | \( 2^{2} \) |
| Twist minimal: | no (minimal twist has level 273) |
| 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
\( x^{6} - 2x^{5} + 2x^{4} + 2x^{3} + 4x^{2} - 4x + 2 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( -2\nu^{5} - 7\nu^{4} + 15\nu^{3} - 25\nu^{2} - 42\nu - 16 ) / 23 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( -4\nu^{5} + 9\nu^{4} - 16\nu^{3} - 4\nu^{2} + 8\nu - 9 ) / 23 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( -7\nu^{5} + 10\nu^{4} - 5\nu^{3} - 7\nu^{2} - 32\nu + 13 ) / 23 \)
|
| \(\beta_{4}\) | \(=\) |
\( ( -11\nu^{5} + 19\nu^{4} - 21\nu^{3} - 11\nu^{2} - 70\nu + 27 ) / 23 \)
|
| \(\beta_{5}\) | \(=\) |
\( ( -12\nu^{5} + 27\nu^{4} - 25\nu^{3} - 35\nu^{2} - 22\nu + 42 ) / 23 \)
|
| \(\nu\) | \(=\) |
\( ( -\beta_{4} + \beta_{3} + \beta_{2} + 1 ) / 2 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( -\beta_{5} + 2\beta_{3} - \beta_1 ) / 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( \beta_{5} - 2\beta_{4} + 4\beta_{3} - 4\beta_{2} - \beta _1 - 4 ) / 2 \)
|
| \(\nu^{4}\) | \(=\) |
\( 2\beta_{5} - 5\beta_{2} - 2\beta _1 - 7 \)
|
| \(\nu^{5}\) | \(=\) |
\( 3\beta_{5} + 3\beta_{4} - 8\beta_{3} - 8\beta_{2} - 2\beta _1 - 9 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1911\mathbb{Z}\right)^\times\).
| \(n\) | \(638\) | \(1471\) | \(1522\) |
| \(\chi(n)\) | \(1\) | \(-1\) | \(1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 883.1 |
|
− | 2.17009i | −1.00000 | −2.70928 | − | 0.630898i | 2.17009i | 0 | 1.53919i | 1.00000 | −1.36910 | ||||||||||||||||||||||||||||||||||
| 883.2 | − | 1.48119i | −1.00000 | −0.193937 | − | 4.15633i | 1.48119i | 0 | − | 2.67513i | 1.00000 | −6.15633 | ||||||||||||||||||||||||||||||||||
| 883.3 | − | 0.311108i | −1.00000 | 1.90321 | − | 1.52543i | 0.311108i | 0 | − | 1.21432i | 1.00000 | −0.474572 | ||||||||||||||||||||||||||||||||||
| 883.4 | 0.311108i | −1.00000 | 1.90321 | 1.52543i | − | 0.311108i | 0 | 1.21432i | 1.00000 | −0.474572 | ||||||||||||||||||||||||||||||||||||
| 883.5 | 1.48119i | −1.00000 | −0.193937 | 4.15633i | − | 1.48119i | 0 | 2.67513i | 1.00000 | −6.15633 | ||||||||||||||||||||||||||||||||||||
| 883.6 | 2.17009i | −1.00000 | −2.70928 | 0.630898i | − | 2.17009i | 0 | − | 1.53919i | 1.00000 | −1.36910 | |||||||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 13.b | even | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 1911.2.c.h | 6 | |
| 7.b | odd | 2 | 1 | 273.2.c.b | ✓ | 6 | |
| 13.b | even | 2 | 1 | inner | 1911.2.c.h | 6 | |
| 21.c | even | 2 | 1 | 819.2.c.c | 6 | ||
| 28.d | even | 2 | 1 | 4368.2.h.o | 6 | ||
| 91.b | odd | 2 | 1 | 273.2.c.b | ✓ | 6 | |
| 91.i | even | 4 | 1 | 3549.2.a.k | 3 | ||
| 91.i | even | 4 | 1 | 3549.2.a.q | 3 | ||
| 273.g | even | 2 | 1 | 819.2.c.c | 6 | ||
| 364.h | even | 2 | 1 | 4368.2.h.o | 6 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 273.2.c.b | ✓ | 6 | 7.b | odd | 2 | 1 | |
| 273.2.c.b | ✓ | 6 | 91.b | odd | 2 | 1 | |
| 819.2.c.c | 6 | 21.c | even | 2 | 1 | ||
| 819.2.c.c | 6 | 273.g | even | 2 | 1 | ||
| 1911.2.c.h | 6 | 1.a | even | 1 | 1 | trivial | |
| 1911.2.c.h | 6 | 13.b | even | 2 | 1 | inner | |
| 3549.2.a.k | 3 | 91.i | even | 4 | 1 | ||
| 3549.2.a.q | 3 | 91.i | even | 4 | 1 | ||
| 4368.2.h.o | 6 | 28.d | even | 2 | 1 | ||
| 4368.2.h.o | 6 | 364.h | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1911, [\chi])\):
|
\( T_{2}^{6} + 7T_{2}^{4} + 11T_{2}^{2} + 1 \)
|
|
\( T_{5}^{6} + 20T_{5}^{4} + 48T_{5}^{2} + 16 \)
|
|
\( T_{17}^{3} - 16T_{17} - 16 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{6} + 7 T^{4} + \cdots + 1 \)
|
| $3$ |
\( (T + 1)^{6} \)
|
| $5$ |
\( T^{6} + 20 T^{4} + \cdots + 16 \)
|
| $7$ |
\( T^{6} \)
|
| $11$ |
\( T^{6} + 44 T^{4} + \cdots + 400 \)
|
| $13$ |
\( T^{6} - 2 T^{5} + \cdots + 2197 \)
|
| $17$ |
\( (T^{3} - 16 T - 16)^{2} \)
|
| $19$ |
\( T^{6} + 64 T^{4} + \cdots + 1024 \)
|
| $23$ |
\( (T^{3} - 2 T^{2} - 20 T + 8)^{2} \)
|
| $29$ |
\( (T^{3} + 2 T^{2} - 52 T - 40)^{2} \)
|
| $31$ |
\( T^{6} + 176 T^{4} + \cdots + 102400 \)
|
| $37$ |
\( T^{6} + 48 T^{4} + \cdots + 1024 \)
|
| $41$ |
\( T^{6} + 132 T^{4} + \cdots + 400 \)
|
| $43$ |
\( (T^{3} + 16 T^{2} + \cdots - 128)^{2} \)
|
| $47$ |
\( T^{6} + 56 T^{4} + \cdots + 2704 \)
|
| $53$ |
\( (T + 6)^{6} \)
|
| $59$ |
\( T^{6} + 40 T^{4} + \cdots + 16 \)
|
| $61$ |
\( (T^{3} + 14 T^{2} + \cdots - 2392)^{2} \)
|
| $67$ |
\( T^{6} + 128 T^{4} + \cdots + 1024 \)
|
| $71$ |
\( T^{6} + 332 T^{4} + \cdots + 547600 \)
|
| $73$ |
\( T^{6} + 272 T^{4} + \cdots + 43264 \)
|
| $79$ |
\( (T^{3} + 16 T^{2} + \cdots + 80)^{2} \)
|
| $83$ |
\( T^{6} + 408 T^{4} + \cdots + 1567504 \)
|
| $89$ |
\( T^{6} + 212 T^{4} + \cdots + 5776 \)
|
| $97$ |
\( T^{6} + 32 T^{4} + \cdots + 256 \)
|
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