Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [450,6,Mod(199,450)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(450, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 1]))
N = Newforms(chi, 6, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("450.199");
S:= CuspForms(chi, 6);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 450 = 2 \cdot 3^{2} \cdot 5^{2} \) |
| Weight: | \( k \) | \(=\) | \( 6 \) |
| Character orbit: | \([\chi]\) | \(=\) | 450.c (of order \(2\), degree \(1\), 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: | \(72.1727189158\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\Q(i, \sqrt{4081})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} + 2041x^{2} + 1040400 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{13}]\) |
| Coefficient ring index: | \( 2^{2}\cdot 3^{2} \) |
| 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 \(1,\beta_1,\beta_2,\beta_3\) 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
\( x^{4} + 2041x^{2} + 1040400 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( \nu^{3} + 1021\nu ) / 1020 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{3} + 3061\nu ) / 340 \)
|
| \(\beta_{3}\) | \(=\) |
\( 6\nu^{2} + 6123 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{2} - 3\beta_1 ) / 6 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( \beta_{3} - 6123 ) / 6 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( -1021\beta_{2} + 9183\beta_1 ) / 6 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/450\mathbb{Z}\right)^\times\).
| \(n\) | \(101\) | \(127\) |
| \(\chi(n)\) | \(1\) | \(-1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 199.1 |
|
− | 4.00000i | 0 | −16.0000 | 0 | 0 | − | 141.648i | 64.0000i | 0 | 0 | ||||||||||||||||||||||||||||
| 199.2 | − | 4.00000i | 0 | −16.0000 | 0 | 0 | 241.648i | 64.0000i | 0 | 0 | ||||||||||||||||||||||||||||||
| 199.3 | 4.00000i | 0 | −16.0000 | 0 | 0 | − | 241.648i | − | 64.0000i | 0 | 0 | |||||||||||||||||||||||||||||
| 199.4 | 4.00000i | 0 | −16.0000 | 0 | 0 | 141.648i | − | 64.0000i | 0 | 0 | ||||||||||||||||||||||||||||||
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 | 450.6.c.q | 4 | |
| 3.b | odd | 2 | 1 | 450.6.c.p | 4 | ||
| 5.b | even | 2 | 1 | inner | 450.6.c.q | 4 | |
| 5.c | odd | 4 | 1 | 450.6.a.ba | yes | 2 | |
| 5.c | odd | 4 | 1 | 450.6.a.bd | yes | 2 | |
| 15.d | odd | 2 | 1 | 450.6.c.p | 4 | ||
| 15.e | even | 4 | 1 | 450.6.a.y | ✓ | 2 | |
| 15.e | even | 4 | 1 | 450.6.a.bf | yes | 2 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 450.6.a.y | ✓ | 2 | 15.e | even | 4 | 1 | |
| 450.6.a.ba | yes | 2 | 5.c | odd | 4 | 1 | |
| 450.6.a.bd | yes | 2 | 5.c | odd | 4 | 1 | |
| 450.6.a.bf | yes | 2 | 15.e | even | 4 | 1 | |
| 450.6.c.p | 4 | 3.b | odd | 2 | 1 | ||
| 450.6.c.p | 4 | 15.d | odd | 2 | 1 | ||
| 450.6.c.q | 4 | 1.a | even | 1 | 1 | trivial | |
| 450.6.c.q | 4 | 5.b | even | 2 | 1 | inner | |
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{6}^{\mathrm{new}}(450, [\chi])\):
|
\( T_{7}^{4} + 78458T_{7}^{2} + 1171624441 \)
|
|
\( T_{11}^{2} - 540T_{11} - 74016 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{2} + 16)^{2} \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( T^{4} \)
|
| $7$ |
\( T^{4} + \cdots + 1171624441 \)
|
| $11$ |
\( (T^{2} - 540 T - 74016)^{2} \)
|
| $13$ |
\( T^{4} + \cdots + 2612129881 \)
|
| $17$ |
\( T^{4} + \cdots + 13049318163456 \)
|
| $19$ |
\( (T^{2} + 592 T - 830609)^{2} \)
|
| $23$ |
\( T^{4} + \cdots + 104976000000 \)
|
| $29$ |
\( (T^{2} + 5700 T + 7975584)^{2} \)
|
| $31$ |
\( (T^{2} + 5708 T + 7227091)^{2} \)
|
| $37$ |
\( T^{4} + \cdots + 115919589427216 \)
|
| $41$ |
\( (T^{2} - 15420 T + 26388000)^{2} \)
|
| $43$ |
\( T^{4} + \cdots + 26\!\cdots\!01 \)
|
| $47$ |
\( T^{4} + \cdots + 12\!\cdots\!00 \)
|
| $53$ |
\( T^{4} + \cdots + 185703196271616 \)
|
| $59$ |
\( (T^{2} + 50520 T + 538752384)^{2} \)
|
| $61$ |
\( (T^{2} + 29126 T - 85423931)^{2} \)
|
| $67$ |
\( T^{4} + \cdots + 56\!\cdots\!21 \)
|
| $71$ |
\( (T^{2} - 6180 T - 573561504)^{2} \)
|
| $73$ |
\( T^{4} + \cdots + 66\!\cdots\!00 \)
|
| $79$ |
\( (T^{2} + 7912 T - 4744428464)^{2} \)
|
| $83$ |
\( T^{4} + \cdots + 39\!\cdots\!76 \)
|
| $89$ |
\( (T^{2} + 164640 T + 2630025216)^{2} \)
|
| $97$ |
\( T^{4} + \cdots + 17\!\cdots\!81 \)
|
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