Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [144,15,Mod(127,144)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(144, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([1, 0, 0]))
N = Newforms(chi, 15, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("144.127");
S:= CuspForms(chi, 15);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 144 = 2^{4} \cdot 3^{2} \) |
| Weight: | \( k \) | \(=\) | \( 15 \) |
| Character orbit: | \([\chi]\) | \(=\) | 144.g (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: | \(179.033714139\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\mathbb{Q}[x]/(x^{4} - \cdots)\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - x^{3} + 16897x^{2} + 16896x + 285474816 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{11}]\) |
| Coefficient ring index: | \( 2^{12}\cdot 3^{9} \) |
| Twist minimal: | no (minimal twist has level 48) |
| 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
\( x^{4} - x^{3} + 16897x^{2} + 16896x + 285474816 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( -243\nu^{3} + 4105971\nu^{2} - 4105971\nu + 34683137280 ) / 11895488 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( 48\nu^{3} + 1216536 ) / 16897 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( 9225\nu^{3} - 152073\nu^{2} + 311597577\nu - 1128847104 ) / 1081408 \)
|
| \(\nu\) | \(=\) |
\( ( 27\beta_{3} - 81\beta_{2} + 11\beta _1 + 1944 ) / 7776 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( 9\beta_{3} + 27\beta_{2} + 7513\beta _1 - 21897864 ) / 2592 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( 16897\beta_{2} - 1216536 ) / 48 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/144\mathbb{Z}\right)^\times\).
| \(n\) | \(37\) | \(65\) | \(127\) |
| \(\chi(n)\) | \(1\) | \(1\) | \(-1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 127.1 |
|
0 | 0 | 0 | −48265.2 | 0 | − | 988060.i | 0 | 0 | 0 | |||||||||||||||||||||||||||||
| 127.2 | 0 | 0 | 0 | −48265.2 | 0 | 988060.i | 0 | 0 | 0 | |||||||||||||||||||||||||||||||
| 127.3 | 0 | 0 | 0 | 39085.2 | 0 | − | 114233.i | 0 | 0 | 0 | ||||||||||||||||||||||||||||||
| 127.4 | 0 | 0 | 0 | 39085.2 | 0 | 114233.i | 0 | 0 | 0 | |||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 4.b | odd | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 144.15.g.e | 4 | |
| 3.b | odd | 2 | 1 | 48.15.g.a | ✓ | 4 | |
| 4.b | odd | 2 | 1 | inner | 144.15.g.e | 4 | |
| 12.b | even | 2 | 1 | 48.15.g.a | ✓ | 4 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 48.15.g.a | ✓ | 4 | 3.b | odd | 2 | 1 | |
| 48.15.g.a | ✓ | 4 | 12.b | even | 2 | 1 | |
| 144.15.g.e | 4 | 1.a | even | 1 | 1 | trivial | |
| 144.15.g.e | 4 | 4.b | odd | 2 | 1 | inner | |
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{5}^{2} + 9180T_{5} - 1886450940 \)
acting on \(S_{15}^{\mathrm{new}}(144, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( (T^{2} + 9180 T - 1886450940)^{2} \)
|
| $7$ |
\( T^{4} + \cdots + 12\!\cdots\!24 \)
|
| $11$ |
\( T^{4} + \cdots + 15\!\cdots\!64 \)
|
| $13$ |
\( (T^{2} + \cdots - 53\!\cdots\!96)^{2} \)
|
| $17$ |
\( (T^{2} + \cdots - 24\!\cdots\!36)^{2} \)
|
| $19$ |
\( T^{4} + \cdots + 17\!\cdots\!44 \)
|
| $23$ |
\( T^{4} + \cdots + 10\!\cdots\!44 \)
|
| $29$ |
\( (T^{2} + \cdots + 16\!\cdots\!24)^{2} \)
|
| $31$ |
\( T^{4} + \cdots + 45\!\cdots\!00 \)
|
| $37$ |
\( (T^{2} + \cdots - 21\!\cdots\!60)^{2} \)
|
| $41$ |
\( (T^{2} + \cdots - 15\!\cdots\!00)^{2} \)
|
| $43$ |
\( T^{4} + \cdots + 12\!\cdots\!44 \)
|
| $47$ |
\( T^{4} + \cdots + 15\!\cdots\!84 \)
|
| $53$ |
\( (T^{2} + \cdots - 45\!\cdots\!04)^{2} \)
|
| $59$ |
\( T^{4} + \cdots + 92\!\cdots\!44 \)
|
| $61$ |
\( (T^{2} + \cdots + 85\!\cdots\!16)^{2} \)
|
| $67$ |
\( T^{4} + \cdots + 10\!\cdots\!24 \)
|
| $71$ |
\( T^{4} + \cdots + 11\!\cdots\!24 \)
|
| $73$ |
\( (T^{2} + \cdots - 62\!\cdots\!96)^{2} \)
|
| $79$ |
\( T^{4} + \cdots + 64\!\cdots\!24 \)
|
| $83$ |
\( T^{4} + \cdots + 78\!\cdots\!84 \)
|
| $89$ |
\( (T^{2} + \cdots - 19\!\cdots\!24)^{2} \)
|
| $97$ |
\( (T^{2} + \cdots - 23\!\cdots\!64)^{2} \)
|
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