Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [686,2,Mod(67,686)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(686, base_ring=CyclotomicField(42))
chi = DirichletCharacter(H, H._module([16]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("686.67");
S:= CuspForms(chi, 2);
N := Newforms(S);
Level: | \( N \) | \(=\) | \( 686 = 2 \cdot 7^{3} \) |
Weight: | \( k \) | \(=\) | \( 2 \) |
Character orbit: | \([\chi]\) | \(=\) | 686.g (of order \(21\), degree \(12\), 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: | \(5.47773757866\) |
Analytic rank: | \(0\) |
Dimension: | \(24\) |
Relative dimension: | \(2\) over \(\Q(\zeta_{21})\) |
Twist minimal: | no (minimal twist has level 98) |
Sato-Tate group: | $\mathrm{SU}(2)[C_{21}]$ |
$q$-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 | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
67.1 | 0.955573 | − | 0.294755i | −0.427316 | − | 1.08878i | 0.826239 | − | 0.563320i | 0.0821245 | + | 0.0123783i | −0.729256 | − | 0.914459i | 0 | 0.623490 | − | 0.781831i | 1.19630 | − | 1.11001i | 0.0821245 | − | 0.0123783i | ||
67.2 | 0.955573 | − | 0.294755i | 0.784496 | + | 1.99886i | 0.826239 | − | 0.563320i | 2.07983 | + | 0.313484i | 1.33882 | + | 1.67883i | 0 | 0.623490 | − | 0.781831i | −1.18087 | + | 1.09568i | 2.07983 | − | 0.313484i | ||
79.1 | −0.988831 | + | 0.149042i | −1.88469 | − | 1.28496i | 0.955573 | − | 0.294755i | −0.269665 | + | 3.59844i | 2.05516 | + | 0.989712i | 0 | −0.900969 | + | 0.433884i | 0.804920 | + | 2.05090i | −0.269665 | − | 3.59844i | ||
79.2 | −0.988831 | + | 0.149042i | 0.934966 | + | 0.637449i | 0.955573 | − | 0.294755i | −0.0772188 | + | 1.03041i | −1.01953 | − | 0.490980i | 0 | −0.900969 | + | 0.433884i | −0.628203 | − | 1.60064i | −0.0772188 | − | 1.03041i | ||
165.1 | −0.988831 | − | 0.149042i | −1.88469 | + | 1.28496i | 0.955573 | + | 0.294755i | −0.269665 | − | 3.59844i | 2.05516 | − | 0.989712i | 0 | −0.900969 | − | 0.433884i | 0.804920 | − | 2.05090i | −0.269665 | + | 3.59844i | ||
165.2 | −0.988831 | − | 0.149042i | 0.934966 | − | 0.637449i | 0.955573 | + | 0.294755i | −0.0772188 | − | 1.03041i | −1.01953 | + | 0.490980i | 0 | −0.900969 | − | 0.433884i | −0.628203 | + | 1.60064i | −0.0772188 | + | 1.03041i | ||
177.1 | −0.733052 | − | 0.680173i | −1.10442 | − | 0.166465i | 0.0747301 | + | 0.997204i | −0.578784 | − | 1.47472i | 0.696376 | + | 0.873227i | 0 | 0.623490 | − | 0.781831i | −1.67467 | − | 0.516569i | −0.578784 | + | 1.47472i | ||
177.2 | −0.733052 | − | 0.680173i | 2.81578 | + | 0.424410i | 0.0747301 | + | 0.997204i | −0.904721 | − | 2.30519i | −1.77544 | − | 2.22633i | 0 | 0.623490 | − | 0.781831i | 4.88176 | + | 1.50582i | −0.904721 | + | 2.30519i | ||
263.1 | 0.826239 | + | 0.563320i | −0.0584109 | − | 0.0541974i | 0.365341 | + | 0.930874i | 0.427005 | − | 0.131714i | −0.0177309 | − | 0.0776840i | 0 | −0.222521 | + | 0.974928i | −0.223716 | − | 2.98528i | 0.427005 | + | 0.131714i | ||
263.2 | 0.826239 | + | 0.563320i | 2.19243 | + | 2.03428i | 0.365341 | + | 0.930874i | −3.17919 | + | 0.980650i | 0.665522 | + | 2.91584i | 0 | −0.222521 | + | 0.974928i | 0.444274 | + | 5.92843i | −3.17919 | − | 0.980650i | ||
275.1 | 0.0747301 | − | 0.997204i | −1.95066 | + | 0.601698i | −0.988831 | − | 0.149042i | −0.958118 | − | 0.889004i | 0.454243 | + | 1.99017i | 0 | −0.222521 | + | 0.974928i | 0.964304 | − | 0.657452i | −0.958118 | + | 0.889004i | ||
275.2 | 0.0747301 | − | 0.997204i | 2.39605 | − | 0.739084i | −0.988831 | − | 0.149042i | 2.18585 | + | 2.02817i | −0.557960 | − | 2.44458i | 0 | −0.222521 | + | 0.974928i | 2.71611 | − | 1.85181i | 2.18585 | − | 2.02817i | ||
373.1 | 0.826239 | − | 0.563320i | −0.0584109 | + | 0.0541974i | 0.365341 | − | 0.930874i | 0.427005 | + | 0.131714i | −0.0177309 | + | 0.0776840i | 0 | −0.222521 | − | 0.974928i | −0.223716 | + | 2.98528i | 0.427005 | − | 0.131714i | ||
373.2 | 0.826239 | − | 0.563320i | 2.19243 | − | 2.03428i | 0.365341 | − | 0.930874i | −3.17919 | − | 0.980650i | 0.665522 | − | 2.91584i | 0 | −0.222521 | − | 0.974928i | 0.444274 | − | 5.92843i | −3.17919 | + | 0.980650i | ||
459.1 | 0.0747301 | + | 0.997204i | −1.95066 | − | 0.601698i | −0.988831 | + | 0.149042i | −0.958118 | + | 0.889004i | 0.454243 | − | 1.99017i | 0 | −0.222521 | − | 0.974928i | 0.964304 | + | 0.657452i | −0.958118 | − | 0.889004i | ||
459.2 | 0.0747301 | + | 0.997204i | 2.39605 | + | 0.739084i | −0.988831 | + | 0.149042i | 2.18585 | − | 2.02817i | −0.557960 | + | 2.44458i | 0 | −0.222521 | − | 0.974928i | 2.71611 | + | 1.85181i | 2.18585 | + | 2.02817i | ||
471.1 | 0.955573 | + | 0.294755i | −0.427316 | + | 1.08878i | 0.826239 | + | 0.563320i | 0.0821245 | − | 0.0123783i | −0.729256 | + | 0.914459i | 0 | 0.623490 | + | 0.781831i | 1.19630 | + | 1.11001i | 0.0821245 | + | 0.0123783i | ||
471.2 | 0.955573 | + | 0.294755i | 0.784496 | − | 1.99886i | 0.826239 | + | 0.563320i | 2.07983 | − | 0.313484i | 1.33882 | − | 1.67883i | 0 | 0.623490 | + | 0.781831i | −1.18087 | − | 1.09568i | 2.07983 | + | 0.313484i | ||
557.1 | 0.365341 | − | 0.930874i | −0.125927 | + | 1.68037i | −0.733052 | − | 0.680173i | −1.87725 | − | 1.27989i | 1.51821 | + | 0.731131i | 0 | −0.900969 | + | 0.433884i | 0.158698 | + | 0.0239199i | −1.87725 | + | 1.27989i | ||
557.2 | 0.365341 | − | 0.930874i | −0.0722934 | + | 0.964688i | −0.733052 | − | 0.680173i | 3.07015 | + | 2.09319i | 0.871591 | + | 0.419736i | 0 | −0.900969 | + | 0.433884i | 2.04110 | + | 0.307646i | 3.07015 | − | 2.09319i | ||
See all 24 embeddings |
Inner twists
Char | Parity | Ord | Mult | Type |
---|---|---|---|---|
1.a | even | 1 | 1 | trivial |
49.g | even | 21 | 1 | inner |
Twists
By twisting character orbit | |||||||
---|---|---|---|---|---|---|---|
Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
1.a | even | 1 | 1 | trivial | 686.2.g.e | 24 | |
7.b | odd | 2 | 1 | 98.2.g.b | ✓ | 24 | |
7.c | even | 3 | 1 | 686.2.e.d | 24 | ||
7.c | even | 3 | 1 | 686.2.g.d | 24 | ||
7.d | odd | 6 | 1 | 686.2.e.c | 24 | ||
7.d | odd | 6 | 1 | 686.2.g.f | 24 | ||
21.c | even | 2 | 1 | 882.2.z.b | 24 | ||
28.d | even | 2 | 1 | 784.2.bg.b | 24 | ||
49.e | even | 7 | 1 | 686.2.g.d | 24 | ||
49.f | odd | 14 | 1 | 686.2.g.f | 24 | ||
49.g | even | 21 | 1 | 686.2.e.d | 24 | ||
49.g | even | 21 | 1 | inner | 686.2.g.e | 24 | |
49.g | even | 21 | 1 | 4802.2.a.l | 12 | ||
49.h | odd | 42 | 1 | 98.2.g.b | ✓ | 24 | |
49.h | odd | 42 | 1 | 686.2.e.c | 24 | ||
49.h | odd | 42 | 1 | 4802.2.a.o | 12 | ||
147.o | even | 42 | 1 | 882.2.z.b | 24 | ||
196.p | even | 42 | 1 | 784.2.bg.b | 24 |
By twisted newform orbit | |||||||
---|---|---|---|---|---|---|---|
Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
98.2.g.b | ✓ | 24 | 7.b | odd | 2 | 1 | |
98.2.g.b | ✓ | 24 | 49.h | odd | 42 | 1 | |
686.2.e.c | 24 | 7.d | odd | 6 | 1 | ||
686.2.e.c | 24 | 49.h | odd | 42 | 1 | ||
686.2.e.d | 24 | 7.c | even | 3 | 1 | ||
686.2.e.d | 24 | 49.g | even | 21 | 1 | ||
686.2.g.d | 24 | 7.c | even | 3 | 1 | ||
686.2.g.d | 24 | 49.e | even | 7 | 1 | ||
686.2.g.e | 24 | 1.a | even | 1 | 1 | trivial | |
686.2.g.e | 24 | 49.g | even | 21 | 1 | inner | |
686.2.g.f | 24 | 7.d | odd | 6 | 1 | ||
686.2.g.f | 24 | 49.f | odd | 14 | 1 | ||
784.2.bg.b | 24 | 28.d | even | 2 | 1 | ||
784.2.bg.b | 24 | 196.p | even | 42 | 1 | ||
882.2.z.b | 24 | 21.c | even | 2 | 1 | ||
882.2.z.b | 24 | 147.o | even | 42 | 1 | ||
4802.2.a.l | 12 | 49.g | even | 21 | 1 | ||
4802.2.a.o | 12 | 49.h | odd | 42 | 1 |
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{24} - 7 T_{3}^{23} + 12 T_{3}^{22} + 28 T_{3}^{21} - 105 T_{3}^{20} - 63 T_{3}^{19} + 617 T_{3}^{18} + \cdots + 1681 \) acting on \(S_{2}^{\mathrm{new}}(686, [\chi])\).