Properties

 Label 847.2.a.b Level $847$ Weight $2$ Character orbit 847.a Self dual yes Analytic conductor $6.763$ Analytic rank $1$ Dimension $1$ CM no Inner twists $1$

Related objects

Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [847,2,Mod(1,847)]

mf = mfinit([N,k,chi],0)

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(847, base_ring=CyclotomicField(2))

chi = DirichletCharacter(H, H._module([0, 0]))

N = Newforms(chi, 2, names="a")

//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code

chi := DirichletCharacter("847.1");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$847 = 7 \cdot 11^{2}$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 847.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: $$6.76332905120$$ Analytic rank: $$1$$ Dimension: $$1$$ Coefficient field: $$\mathbb{Q}$$ Coefficient ring: $$\mathbb{Z}$$ Coefficient ring index: $$1$$ Twist minimal: no (minimal twist has level 77) 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)

 $$f(q)$$ $$=$$ $$q - 3 q^{3} - 2 q^{4} - q^{5} + q^{7} + 6 q^{9}+O(q^{10})$$ q - 3 * q^3 - 2 * q^4 - q^5 + q^7 + 6 * q^9 $$q - 3 q^{3} - 2 q^{4} - q^{5} + q^{7} + 6 q^{9} + 6 q^{12} + 4 q^{13} + 3 q^{15} + 4 q^{16} - 2 q^{17} + 6 q^{19} + 2 q^{20} - 3 q^{21} - 5 q^{23} - 4 q^{25} - 9 q^{27} - 2 q^{28} - 10 q^{29} + q^{31} - q^{35} - 12 q^{36} - 5 q^{37} - 12 q^{39} + 2 q^{41} + 8 q^{43} - 6 q^{45} + 8 q^{47} - 12 q^{48} + q^{49} + 6 q^{51} - 8 q^{52} - 6 q^{53} - 18 q^{57} + 3 q^{59} - 6 q^{60} + 2 q^{61} + 6 q^{63} - 8 q^{64} - 4 q^{65} - 3 q^{67} + 4 q^{68} + 15 q^{69} + q^{71} - 10 q^{73} + 12 q^{75} - 12 q^{76} - 6 q^{79} - 4 q^{80} + 9 q^{81} - 12 q^{83} + 6 q^{84} + 2 q^{85} + 30 q^{87} - 15 q^{89} + 4 q^{91} + 10 q^{92} - 3 q^{93} - 6 q^{95} - 5 q^{97}+O(q^{100})$$ q - 3 * q^3 - 2 * q^4 - q^5 + q^7 + 6 * q^9 + 6 * q^12 + 4 * q^13 + 3 * q^15 + 4 * q^16 - 2 * q^17 + 6 * q^19 + 2 * q^20 - 3 * q^21 - 5 * q^23 - 4 * q^25 - 9 * q^27 - 2 * q^28 - 10 * q^29 + q^31 - q^35 - 12 * q^36 - 5 * q^37 - 12 * q^39 + 2 * q^41 + 8 * q^43 - 6 * q^45 + 8 * q^47 - 12 * q^48 + q^49 + 6 * q^51 - 8 * q^52 - 6 * q^53 - 18 * q^57 + 3 * q^59 - 6 * q^60 + 2 * q^61 + 6 * q^63 - 8 * q^64 - 4 * q^65 - 3 * q^67 + 4 * q^68 + 15 * q^69 + q^71 - 10 * q^73 + 12 * q^75 - 12 * q^76 - 6 * q^79 - 4 * q^80 + 9 * q^81 - 12 * q^83 + 6 * q^84 + 2 * q^85 + 30 * q^87 - 15 * q^89 + 4 * q^91 + 10 * q^92 - 3 * q^93 - 6 * q^95 - 5 * q^97

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
 0
0 −3.00000 −2.00000 −1.00000 0 1.00000 0 6.00000 0
 $$n$$: e.g. 2-40 or 990-1000 Significant digits: Format: Complex embeddings Normalized embeddings Satake parameters Satake angles

Atkin-Lehner signs

$$p$$ Sign
$$7$$ $$-1$$
$$11$$ $$-1$$

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 847.2.a.b 1
3.b odd 2 1 7623.2.a.j 1
7.b odd 2 1 5929.2.a.f 1
11.b odd 2 1 77.2.a.a 1
11.c even 5 4 847.2.f.h 4
11.d odd 10 4 847.2.f.i 4
33.d even 2 1 693.2.a.c 1
44.c even 2 1 1232.2.a.l 1
55.d odd 2 1 1925.2.a.h 1
55.e even 4 2 1925.2.b.e 2
77.b even 2 1 539.2.a.c 1
77.h odd 6 2 539.2.e.f 2
77.i even 6 2 539.2.e.c 2
88.b odd 2 1 4928.2.a.bj 1
88.g even 2 1 4928.2.a.a 1
231.h odd 2 1 4851.2.a.j 1
308.g odd 2 1 8624.2.a.a 1

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
77.2.a.a 1 11.b odd 2 1
539.2.a.c 1 77.b even 2 1
539.2.e.c 2 77.i even 6 2
539.2.e.f 2 77.h odd 6 2
693.2.a.c 1 33.d even 2 1
847.2.a.b 1 1.a even 1 1 trivial
847.2.f.h 4 11.c even 5 4
847.2.f.i 4 11.d odd 10 4
1232.2.a.l 1 44.c even 2 1
1925.2.a.h 1 55.d odd 2 1
1925.2.b.e 2 55.e even 4 2
4851.2.a.j 1 231.h odd 2 1
4928.2.a.a 1 88.g even 2 1
4928.2.a.bj 1 88.b odd 2 1
5929.2.a.f 1 7.b odd 2 1
7623.2.a.j 1 3.b odd 2 1
8624.2.a.a 1 308.g odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(\Gamma_0(847))$$:

 $$T_{2}$$ T2 $$T_{3} + 3$$ T3 + 3

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T$$
$3$ $$T + 3$$
$5$ $$T + 1$$
$7$ $$T - 1$$
$11$ $$T$$
$13$ $$T - 4$$
$17$ $$T + 2$$
$19$ $$T - 6$$
$23$ $$T + 5$$
$29$ $$T + 10$$
$31$ $$T - 1$$
$37$ $$T + 5$$
$41$ $$T - 2$$
$43$ $$T - 8$$
$47$ $$T - 8$$
$53$ $$T + 6$$
$59$ $$T - 3$$
$61$ $$T - 2$$
$67$ $$T + 3$$
$71$ $$T - 1$$
$73$ $$T + 10$$
$79$ $$T + 6$$
$83$ $$T + 12$$
$89$ $$T + 15$$
$97$ $$T + 5$$