Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [49,12,Mod(1,49)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(49, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0]))
N = Newforms(chi, 12, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("49.1");
S:= CuspForms(chi, 12);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 49 = 7^{2} \) |
| Weight: | \( k \) | \(=\) | \( 12 \) |
| Character orbit: | \([\chi]\) | \(=\) | 49.a (trivial) |
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: | yes |
| Analytic conductor: | \(37.6488158474\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{3369}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 842 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 2 \) |
| Twist minimal: | no (minimal twist has level 7) |
| Fricke sign: | \(-1\) |
| Sato-Tate group: | $\mathrm{SU}(2)$ |
$q$-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 \(\beta = \sqrt{3369}\). We also show the integral \(q\)-expansion of the trace form.
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1 |
|
−85.0431 | −408.259 | 5184.33 | 7330.43 | 34719.6 | 0 | −266723. | −10472.0 | −623402. | ||||||||||||||||||||||||
| 1.2 | 31.0431 | 288.259 | −1084.33 | 6169.57 | 8948.43 | 0 | −97237.1 | −94054.0 | 191522. | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(7\) | \(-1\) |
Inner twists
This newform does not admit any (nontrivial) inner twists.
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 49.12.a.c | 2 | |
| 7.b | odd | 2 | 1 | 7.12.a.a | ✓ | 2 | |
| 7.c | even | 3 | 2 | 49.12.c.e | 4 | ||
| 7.d | odd | 6 | 2 | 49.12.c.d | 4 | ||
| 21.c | even | 2 | 1 | 63.12.a.c | 2 | ||
| 28.d | even | 2 | 1 | 112.12.a.d | 2 | ||
| 35.c | odd | 2 | 1 | 175.12.a.a | 2 | ||
| 35.f | even | 4 | 2 | 175.12.b.a | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 7.12.a.a | ✓ | 2 | 7.b | odd | 2 | 1 | |
| 49.12.a.c | 2 | 1.a | even | 1 | 1 | trivial | |
| 49.12.c.d | 4 | 7.d | odd | 6 | 2 | ||
| 49.12.c.e | 4 | 7.c | even | 3 | 2 | ||
| 63.12.a.c | 2 | 21.c | even | 2 | 1 | ||
| 112.12.a.d | 2 | 28.d | even | 2 | 1 | ||
| 175.12.a.a | 2 | 35.c | odd | 2 | 1 | ||
| 175.12.b.a | 4 | 35.f | even | 4 | 2 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{12}^{\mathrm{new}}(\Gamma_0(49))\):
|
\( T_{2}^{2} + 54T_{2} - 2640 \)
|
|
\( T_{3}^{2} + 120T_{3} - 117684 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} + 54T - 2640 \)
|
| $3$ |
\( T^{2} + 120T - 117684 \)
|
| $5$ |
\( T^{2} - 13500 T + 45225600 \)
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| $7$ |
\( T^{2} \)
|
| $11$ |
\( T^{2} + \cdots + 82628600064 \)
|
| $13$ |
\( T^{2} + \cdots - 3004246048160 \)
|
| $17$ |
\( T^{2} + \cdots + 4294132070676 \)
|
| $19$ |
\( T^{2} + \cdots + 60418820423500 \)
|
| $23$ |
\( T^{2} + \cdots + 10\!\cdots\!64 \)
|
| $29$ |
\( T^{2} + \cdots - 11\!\cdots\!40 \)
|
| $31$ |
\( T^{2} + \cdots - 62\!\cdots\!08 \)
|
| $37$ |
\( T^{2} + \cdots - 39\!\cdots\!36 \)
|
| $41$ |
\( T^{2} + \cdots + 28\!\cdots\!16 \)
|
| $43$ |
\( T^{2} + \cdots + 54\!\cdots\!20 \)
|
| $47$ |
\( T^{2} + \cdots - 48\!\cdots\!32 \)
|
| $53$ |
\( T^{2} + \cdots - 98\!\cdots\!88 \)
|
| $59$ |
\( T^{2} + \cdots - 34\!\cdots\!00 \)
|
| $61$ |
\( T^{2} + \cdots + 45\!\cdots\!56 \)
|
| $67$ |
\( T^{2} + \cdots - 11\!\cdots\!48 \)
|
| $71$ |
\( T^{2} + \cdots + 13\!\cdots\!60 \)
|
| $73$ |
\( T^{2} + \cdots + 10\!\cdots\!92 \)
|
| $79$ |
\( T^{2} + \cdots - 63\!\cdots\!20 \)
|
| $83$ |
\( T^{2} + \cdots - 37\!\cdots\!88 \)
|
| $89$ |
\( T^{2} + \cdots + 20\!\cdots\!00 \)
|
| $97$ |
\( T^{2} + \cdots + 90\!\cdots\!08 \)
|
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