Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [75,10,Mod(32,75)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(75, base_ring=CyclotomicField(4))
chi = DirichletCharacter(H, H._module([2, 1]))
N = Newforms(chi, 10, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("75.32");
S:= CuspForms(chi, 10);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 75 = 3 \cdot 5^{2} \) |
| Weight: | \( k \) | \(=\) | \( 10 \) |
| Character orbit: | \([\chi]\) | \(=\) | 75.e (of order \(4\), degree \(2\), 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: | \(38.6276877123\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Relative dimension: | \(2\) over \(\Q(i)\) |
| Coefficient field: | \(\Q(i, \sqrt{86})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} + 1849 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{4}]\) |
| Coefficient ring index: | \( 3^{2} \) |
| Twist minimal: | yes |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{4}]$ |
$q$-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
\( x^{4} + 1849 \)
:
| \(\beta_{1}\) | \(=\) |
\( 3\nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{2} ) / 43 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( 3\nu^{3} ) / 43 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_1 ) / 3 \)
|
| \(\nu^{2}\) | \(=\) |
\( 43\beta_{2} \)
|
| \(\nu^{3}\) | \(=\) |
\( ( 43\beta_{3} ) / 3 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/75\mathbb{Z}\right)^\times\).
| \(n\) | \(26\) | \(52\) |
| \(\chi(n)\) | \(-1\) | \(-\beta_{2}\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 32.1 |
|
−27.8209 | + | 27.8209i | −131.731 | + | 48.2687i | − | 1036.00i | 0 | 2322.00 | − | 5007.75i | 6300.00 | + | 6300.00i | 14578.1 | + | 14578.1i | 15023.3 | − | 12717.0i | 0 | |||||||||||||||||
| 32.2 | 27.8209 | − | 27.8209i | −48.2687 | + | 131.731i | − | 1036.00i | 0 | 2322.00 | + | 5007.75i | 6300.00 | + | 6300.00i | −14578.1 | − | 14578.1i | −15023.3 | − | 12717.0i | 0 | ||||||||||||||||||
| 68.1 | −27.8209 | − | 27.8209i | −131.731 | − | 48.2687i | 1036.00i | 0 | 2322.00 | + | 5007.75i | 6300.00 | − | 6300.00i | 14578.1 | − | 14578.1i | 15023.3 | + | 12717.0i | 0 | |||||||||||||||||||
| 68.2 | 27.8209 | + | 27.8209i | −48.2687 | − | 131.731i | 1036.00i | 0 | 2322.00 | − | 5007.75i | 6300.00 | − | 6300.00i | −14578.1 | + | 14578.1i | −15023.3 | + | 12717.0i | 0 | |||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 3.b | odd | 2 | 1 | inner |
| 5.c | odd | 4 | 1 | inner |
| 15.e | even | 4 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 75.10.e.a | ✓ | 4 |
| 3.b | odd | 2 | 1 | inner | 75.10.e.a | ✓ | 4 |
| 5.b | even | 2 | 1 | 75.10.e.d | yes | 4 | |
| 5.c | odd | 4 | 1 | inner | 75.10.e.a | ✓ | 4 |
| 5.c | odd | 4 | 1 | 75.10.e.d | yes | 4 | |
| 15.d | odd | 2 | 1 | 75.10.e.d | yes | 4 | |
| 15.e | even | 4 | 1 | inner | 75.10.e.a | ✓ | 4 |
| 15.e | even | 4 | 1 | 75.10.e.d | yes | 4 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 75.10.e.a | ✓ | 4 | 1.a | even | 1 | 1 | trivial |
| 75.10.e.a | ✓ | 4 | 3.b | odd | 2 | 1 | inner |
| 75.10.e.a | ✓ | 4 | 5.c | odd | 4 | 1 | inner |
| 75.10.e.a | ✓ | 4 | 15.e | even | 4 | 1 | inner |
| 75.10.e.d | yes | 4 | 5.b | even | 2 | 1 | |
| 75.10.e.d | yes | 4 | 5.c | odd | 4 | 1 | |
| 75.10.e.d | yes | 4 | 15.d | odd | 2 | 1 | |
| 75.10.e.d | yes | 4 | 15.e | even | 4 | 1 | |
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{10}^{\mathrm{new}}(75, [\chi])\):
|
\( T_{2}^{4} + 2396304 \)
|
|
\( T_{7}^{2} - 12600T_{7} + 79380000 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} + 2396304 \)
|
| $3$ |
\( T^{4} + 360 T^{3} + \cdots + 387420489 \)
|
| $5$ |
\( T^{4} \)
|
| $7$ |
\( (T^{2} - 12600 T + 79380000)^{2} \)
|
| $11$ |
\( (T^{2} + 100310400)^{2} \)
|
| $13$ |
\( (T^{2} + 227520 T + 25882675200)^{2} \)
|
| $17$ |
\( T^{4} + 12\!\cdots\!44 \)
|
| $19$ |
\( (T^{2} + 5534764816)^{2} \)
|
| $23$ |
\( T^{4} + 70\!\cdots\!04 \)
|
| $29$ |
\( (T^{2} - 31569789398400)^{2} \)
|
| $31$ |
\( (T + 1729928)^{4} \)
|
| $37$ |
\( (T^{2} + \cdots + 66205984780800)^{2} \)
|
| $41$ |
\( (T^{2} + 238205200982400)^{2} \)
|
| $43$ |
\( (T^{2} + \cdots + 11\!\cdots\!00)^{2} \)
|
| $47$ |
\( T^{4} + 24\!\cdots\!24 \)
|
| $53$ |
\( T^{4} + 10\!\cdots\!24 \)
|
| $59$ |
\( (T^{2} - 10\!\cdots\!00)^{2} \)
|
| $61$ |
\( (T - 15186242)^{4} \)
|
| $67$ |
\( (T^{2} + \cdots + 51\!\cdots\!00)^{2} \)
|
| $71$ |
\( (T^{2} + 18\!\cdots\!00)^{2} \)
|
| $73$ |
\( (T^{2} + \cdots + 31\!\cdots\!00)^{2} \)
|
| $79$ |
\( (T^{2} + 39\!\cdots\!76)^{2} \)
|
| $83$ |
\( T^{4} + 44\!\cdots\!44 \)
|
| $89$ |
\( (T^{2} - 57\!\cdots\!00)^{2} \)
|
| $97$ |
\( (T^{2} + \cdots + 12\!\cdots\!00)^{2} \)
|
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