Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [867,2,Mod(688,867)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(867, base_ring=CyclotomicField(8))
chi = DirichletCharacter(H, H._module([0, 5]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("867.688");
S:= CuspForms(chi, 2);
N := Newforms(S);
Level: | \( N \) | \(=\) | \( 867 = 3 \cdot 17^{2} \) |
Weight: | \( k \) | \(=\) | \( 2 \) |
Character orbit: | \([\chi]\) | \(=\) | 867.h (of order \(8\), degree \(4\), 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: | \(6.92302985525\) |
Analytic rank: | \(0\) |
Dimension: | \(48\) |
Relative dimension: | \(12\) over \(\Q(\zeta_{8})\) |
Twist minimal: | yes |
Sato-Tate group: | $\mathrm{SU}(2)[C_{8}]$ |
$q$-expansion
The dimension is sufficiently large that we do not compute an algebraic \(q\)-expansion, but we have computed the trace expansion.
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 | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
688.1 | −1.94326 | + | 1.94326i | −0.382683 | + | 0.923880i | − | 5.55252i | 0.899799 | + | 0.372709i | −1.05168 | − | 2.53899i | 1.48128 | − | 0.613566i | 6.90347 | + | 6.90347i | −0.707107 | − | 0.707107i | −2.47281 | + | 1.02427i | |
688.2 | −1.94326 | + | 1.94326i | 0.382683 | − | 0.923880i | − | 5.55252i | −0.899799 | − | 0.372709i | 1.05168 | + | 2.53899i | −1.48128 | + | 0.613566i | 6.90347 | + | 6.90347i | −0.707107 | − | 0.707107i | 2.47281 | − | 1.02427i | |
688.3 | −1.72814 | + | 1.72814i | −0.382683 | + | 0.923880i | − | 3.97290i | −2.65475 | − | 1.09964i | −0.935260 | − | 2.25792i | 1.44358 | − | 0.597950i | 3.40944 | + | 3.40944i | −0.707107 | − | 0.707107i | 6.48809 | − | 2.68746i | |
688.4 | −1.72814 | + | 1.72814i | 0.382683 | − | 0.923880i | − | 3.97290i | 2.65475 | + | 1.09964i | 0.935260 | + | 2.25792i | −1.44358 | + | 0.597950i | 3.40944 | + | 3.40944i | −0.707107 | − | 0.707107i | −6.48809 | + | 2.68746i | |
688.5 | −0.641392 | + | 0.641392i | −0.382683 | + | 0.923880i | 1.17723i | −2.95025 | − | 1.22203i | −0.347119 | − | 0.838019i | −3.29117 | + | 1.36325i | −2.03785 | − | 2.03785i | −0.707107 | − | 0.707107i | 2.67607 | − | 1.10847i | ||
688.6 | −0.641392 | + | 0.641392i | 0.382683 | − | 0.923880i | 1.17723i | 2.95025 | + | 1.22203i | 0.347119 | + | 0.838019i | 3.29117 | − | 1.36325i | −2.03785 | − | 2.03785i | −0.707107 | − | 0.707107i | −2.67607 | + | 1.10847i | ||
688.7 | −0.307898 | + | 0.307898i | −0.382683 | + | 0.923880i | 1.81040i | 3.89949 | + | 1.61522i | −0.166633 | − | 0.402288i | −2.68832 | + | 1.11354i | −1.17321 | − | 1.17321i | −0.707107 | − | 0.707107i | −1.69797 | + | 0.703322i | ||
688.8 | −0.307898 | + | 0.307898i | 0.382683 | − | 0.923880i | 1.81040i | −3.89949 | − | 1.61522i | 0.166633 | + | 0.402288i | 2.68832 | − | 1.11354i | −1.17321 | − | 1.17321i | −0.707107 | − | 0.707107i | 1.69797 | − | 0.703322i | ||
688.9 | 1.01764 | − | 1.01764i | −0.382683 | + | 0.923880i | − | 0.0711653i | 2.13781 | + | 0.885508i | 0.550741 | + | 1.32961i | 4.10362 | − | 1.69978i | 1.96285 | + | 1.96285i | −0.707107 | − | 0.707107i | 3.07663 | − | 1.27438i | |
688.10 | 1.01764 | − | 1.01764i | 0.382683 | − | 0.923880i | − | 0.0711653i | −2.13781 | − | 0.885508i | −0.550741 | − | 1.32961i | −4.10362 | + | 1.69978i | 1.96285 | + | 1.96285i | −0.707107 | − | 0.707107i | −3.07663 | + | 1.27438i | |
688.11 | 1.48173 | − | 1.48173i | −0.382683 | + | 0.923880i | − | 2.39104i | 1.43955 | + | 0.596279i | 0.801906 | + | 1.93597i | −3.82062 | + | 1.58255i | −0.579419 | − | 0.579419i | −0.707107 | − | 0.707107i | 3.01654 | − | 1.24949i | |
688.12 | 1.48173 | − | 1.48173i | 0.382683 | − | 0.923880i | − | 2.39104i | −1.43955 | − | 0.596279i | −0.801906 | − | 1.93597i | 3.82062 | − | 1.58255i | −0.579419 | − | 0.579419i | −0.707107 | − | 0.707107i | −3.01654 | + | 1.24949i | |
712.1 | −1.94326 | − | 1.94326i | −0.382683 | − | 0.923880i | 5.55252i | 0.899799 | − | 0.372709i | −1.05168 | + | 2.53899i | 1.48128 | + | 0.613566i | 6.90347 | − | 6.90347i | −0.707107 | + | 0.707107i | −2.47281 | − | 1.02427i | ||
712.2 | −1.94326 | − | 1.94326i | 0.382683 | + | 0.923880i | 5.55252i | −0.899799 | + | 0.372709i | 1.05168 | − | 2.53899i | −1.48128 | − | 0.613566i | 6.90347 | − | 6.90347i | −0.707107 | + | 0.707107i | 2.47281 | + | 1.02427i | ||
712.3 | −1.72814 | − | 1.72814i | −0.382683 | − | 0.923880i | 3.97290i | −2.65475 | + | 1.09964i | −0.935260 | + | 2.25792i | 1.44358 | + | 0.597950i | 3.40944 | − | 3.40944i | −0.707107 | + | 0.707107i | 6.48809 | + | 2.68746i | ||
712.4 | −1.72814 | − | 1.72814i | 0.382683 | + | 0.923880i | 3.97290i | 2.65475 | − | 1.09964i | 0.935260 | − | 2.25792i | −1.44358 | − | 0.597950i | 3.40944 | − | 3.40944i | −0.707107 | + | 0.707107i | −6.48809 | − | 2.68746i | ||
712.5 | −0.641392 | − | 0.641392i | −0.382683 | − | 0.923880i | − | 1.17723i | −2.95025 | + | 1.22203i | −0.347119 | + | 0.838019i | −3.29117 | − | 1.36325i | −2.03785 | + | 2.03785i | −0.707107 | + | 0.707107i | 2.67607 | + | 1.10847i | |
712.6 | −0.641392 | − | 0.641392i | 0.382683 | + | 0.923880i | − | 1.17723i | 2.95025 | − | 1.22203i | 0.347119 | − | 0.838019i | 3.29117 | + | 1.36325i | −2.03785 | + | 2.03785i | −0.707107 | + | 0.707107i | −2.67607 | − | 1.10847i | |
712.7 | −0.307898 | − | 0.307898i | −0.382683 | − | 0.923880i | − | 1.81040i | 3.89949 | − | 1.61522i | −0.166633 | + | 0.402288i | −2.68832 | − | 1.11354i | −1.17321 | + | 1.17321i | −0.707107 | + | 0.707107i | −1.69797 | − | 0.703322i | |
712.8 | −0.307898 | − | 0.307898i | 0.382683 | + | 0.923880i | − | 1.81040i | −3.89949 | + | 1.61522i | 0.166633 | − | 0.402288i | 2.68832 | + | 1.11354i | −1.17321 | + | 1.17321i | −0.707107 | + | 0.707107i | 1.69797 | + | 0.703322i | |
See all 48 embeddings |
Inner twists
Char | Parity | Ord | Mult | Type |
---|---|---|---|---|
1.a | even | 1 | 1 | trivial |
17.b | even | 2 | 1 | inner |
17.c | even | 4 | 2 | inner |
17.d | even | 8 | 4 | inner |
Twists
By twisting character orbit | |||||||
---|---|---|---|---|---|---|---|
Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
1.a | even | 1 | 1 | trivial | 867.2.h.m | 48 | |
17.b | even | 2 | 1 | inner | 867.2.h.m | 48 | |
17.c | even | 4 | 2 | inner | 867.2.h.m | 48 | |
17.d | even | 8 | 4 | inner | 867.2.h.m | 48 | |
17.e | odd | 16 | 1 | 867.2.a.o | ✓ | 6 | |
17.e | odd | 16 | 1 | 867.2.a.p | yes | 6 | |
17.e | odd | 16 | 2 | 867.2.d.g | 12 | ||
17.e | odd | 16 | 4 | 867.2.e.k | 24 | ||
51.i | even | 16 | 1 | 2601.2.a.bh | 6 | ||
51.i | even | 16 | 1 | 2601.2.a.bi | 6 |
By twisted newform orbit | |||||||
---|---|---|---|---|---|---|---|
Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
867.2.a.o | ✓ | 6 | 17.e | odd | 16 | 1 | |
867.2.a.p | yes | 6 | 17.e | odd | 16 | 1 | |
867.2.d.g | 12 | 17.e | odd | 16 | 2 | ||
867.2.e.k | 24 | 17.e | odd | 16 | 4 | ||
867.2.h.m | 48 | 1.a | even | 1 | 1 | trivial | |
867.2.h.m | 48 | 17.b | even | 2 | 1 | inner | |
867.2.h.m | 48 | 17.c | even | 4 | 2 | inner | |
867.2.h.m | 48 | 17.d | even | 8 | 4 | inner | |
2601.2.a.bh | 6 | 51.i | even | 16 | 1 | ||
2601.2.a.bi | 6 | 51.i | even | 16 | 1 |
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(867, [\chi])\):
\( T_{2}^{24} + 117T_{2}^{20} + 4386T_{2}^{16} + 58705T_{2}^{12} + 208080T_{2}^{8} + 121344T_{2}^{4} + 4096 \) |
\( T_{5}^{48} + 117045 T_{5}^{40} + 1707261258 T_{5}^{32} + 6444357521537 T_{5}^{24} + \cdots + 11\!\cdots\!56 \) |