# Properties

 Label 930.2.d.d Level $930$ Weight $2$ Character orbit 930.d Analytic conductor $7.426$ Analytic rank $0$ Dimension $2$ CM no Inner twists $2$

# Related objects

Show commands: Magma / PariGP / SageMath

## Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [930,2,Mod(559,930)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(930, base_ring=CyclotomicField(2))

chi = DirichletCharacter(H, H._module([0, 1, 0]))

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

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

chi := DirichletCharacter("930.559");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$930 = 2 \cdot 3 \cdot 5 \cdot 31$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 930.d (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: $$7.42608738798$$ Analytic rank: $$0$$ Dimension: $$2$$ Coefficient field: $$\Q(\sqrt{-1})$$ comment: defining polynomial  gp: f.mod \\ as an extension of the character field Defining polynomial: $$x^{2} + 1$$ x^2 + 1 Coefficient ring: $$\Z[a_1, a_2]$$ Coefficient ring index: $$1$$ Twist minimal: yes 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 $$i = \sqrt{-1}$$. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q - i q^{2} - i q^{3} - q^{4} + (i + 2) q^{5} - q^{6} + 2 i q^{7} + i q^{8} - q^{9} +O(q^{10})$$ q - i * q^2 - i * q^3 - q^4 + (i + 2) * q^5 - q^6 + 2*i * q^7 + i * q^8 - q^9 $$q - i q^{2} - i q^{3} - q^{4} + (i + 2) q^{5} - q^{6} + 2 i q^{7} + i q^{8} - q^{9} + ( - 2 i + 1) q^{10} + i q^{12} + 2 i q^{13} + 2 q^{14} + ( - 2 i + 1) q^{15} + q^{16} + i q^{18} + 4 q^{19} + ( - i - 2) q^{20} + 2 q^{21} + 2 i q^{23} + q^{24} + (4 i + 3) q^{25} + 2 q^{26} + i q^{27} - 2 i q^{28} + 10 q^{29} + ( - i - 2) q^{30} - q^{31} - i q^{32} + (4 i - 2) q^{35} + q^{36} + 2 i q^{37} - 4 i q^{38} + 2 q^{39} + (2 i - 1) q^{40} + 2 q^{41} - 2 i q^{42} + 4 i q^{43} + ( - i - 2) q^{45} + 2 q^{46} - 4 i q^{47} - i q^{48} + 3 q^{49} + ( - 3 i + 4) q^{50} - 2 i q^{52} + 2 i q^{53} + q^{54} - 2 q^{56} - 4 i q^{57} - 10 i q^{58} + 6 q^{59} + (2 i - 1) q^{60} - 8 q^{61} + i q^{62} - 2 i q^{63} - q^{64} + (4 i - 2) q^{65} - 8 i q^{67} + 2 q^{69} + (2 i + 4) q^{70} - 8 q^{71} - i q^{72} - 10 i q^{73} + 2 q^{74} + ( - 3 i + 4) q^{75} - 4 q^{76} - 2 i q^{78} - 12 q^{79} + (i + 2) q^{80} + q^{81} - 2 i q^{82} + 4 i q^{83} - 2 q^{84} + 4 q^{86} - 10 i q^{87} + 14 q^{89} + (2 i - 1) q^{90} - 4 q^{91} - 2 i q^{92} + i q^{93} - 4 q^{94} + (4 i + 8) q^{95} - q^{96} + 4 i q^{97} - 3 i q^{98} +O(q^{100})$$ q - i * q^2 - i * q^3 - q^4 + (i + 2) * q^5 - q^6 + 2*i * q^7 + i * q^8 - q^9 + (-2*i + 1) * q^10 + i * q^12 + 2*i * q^13 + 2 * q^14 + (-2*i + 1) * q^15 + q^16 + i * q^18 + 4 * q^19 + (-i - 2) * q^20 + 2 * q^21 + 2*i * q^23 + q^24 + (4*i + 3) * q^25 + 2 * q^26 + i * q^27 - 2*i * q^28 + 10 * q^29 + (-i - 2) * q^30 - q^31 - i * q^32 + (4*i - 2) * q^35 + q^36 + 2*i * q^37 - 4*i * q^38 + 2 * q^39 + (2*i - 1) * q^40 + 2 * q^41 - 2*i * q^42 + 4*i * q^43 + (-i - 2) * q^45 + 2 * q^46 - 4*i * q^47 - i * q^48 + 3 * q^49 + (-3*i + 4) * q^50 - 2*i * q^52 + 2*i * q^53 + q^54 - 2 * q^56 - 4*i * q^57 - 10*i * q^58 + 6 * q^59 + (2*i - 1) * q^60 - 8 * q^61 + i * q^62 - 2*i * q^63 - q^64 + (4*i - 2) * q^65 - 8*i * q^67 + 2 * q^69 + (2*i + 4) * q^70 - 8 * q^71 - i * q^72 - 10*i * q^73 + 2 * q^74 + (-3*i + 4) * q^75 - 4 * q^76 - 2*i * q^78 - 12 * q^79 + (i + 2) * q^80 + q^81 - 2*i * q^82 + 4*i * q^83 - 2 * q^84 + 4 * q^86 - 10*i * q^87 + 14 * q^89 + (2*i - 1) * q^90 - 4 * q^91 - 2*i * q^92 + i * q^93 - 4 * q^94 + (4*i + 8) * q^95 - q^96 + 4*i * q^97 - 3*i * q^98 $$\operatorname{Tr}(f)(q)$$ $$=$$ $$2 q - 2 q^{4} + 4 q^{5} - 2 q^{6} - 2 q^{9}+O(q^{10})$$ 2 * q - 2 * q^4 + 4 * q^5 - 2 * q^6 - 2 * q^9 $$2 q - 2 q^{4} + 4 q^{5} - 2 q^{6} - 2 q^{9} + 2 q^{10} + 4 q^{14} + 2 q^{15} + 2 q^{16} + 8 q^{19} - 4 q^{20} + 4 q^{21} + 2 q^{24} + 6 q^{25} + 4 q^{26} + 20 q^{29} - 4 q^{30} - 2 q^{31} - 4 q^{35} + 2 q^{36} + 4 q^{39} - 2 q^{40} + 4 q^{41} - 4 q^{45} + 4 q^{46} + 6 q^{49} + 8 q^{50} + 2 q^{54} - 4 q^{56} + 12 q^{59} - 2 q^{60} - 16 q^{61} - 2 q^{64} - 4 q^{65} + 4 q^{69} + 8 q^{70} - 16 q^{71} + 4 q^{74} + 8 q^{75} - 8 q^{76} - 24 q^{79} + 4 q^{80} + 2 q^{81} - 4 q^{84} + 8 q^{86} + 28 q^{89} - 2 q^{90} - 8 q^{91} - 8 q^{94} + 16 q^{95} - 2 q^{96}+O(q^{100})$$ 2 * q - 2 * q^4 + 4 * q^5 - 2 * q^6 - 2 * q^9 + 2 * q^10 + 4 * q^14 + 2 * q^15 + 2 * q^16 + 8 * q^19 - 4 * q^20 + 4 * q^21 + 2 * q^24 + 6 * q^25 + 4 * q^26 + 20 * q^29 - 4 * q^30 - 2 * q^31 - 4 * q^35 + 2 * q^36 + 4 * q^39 - 2 * q^40 + 4 * q^41 - 4 * q^45 + 4 * q^46 + 6 * q^49 + 8 * q^50 + 2 * q^54 - 4 * q^56 + 12 * q^59 - 2 * q^60 - 16 * q^61 - 2 * q^64 - 4 * q^65 + 4 * q^69 + 8 * q^70 - 16 * q^71 + 4 * q^74 + 8 * q^75 - 8 * q^76 - 24 * q^79 + 4 * q^80 + 2 * q^81 - 4 * q^84 + 8 * q^86 + 28 * q^89 - 2 * q^90 - 8 * q^91 - 8 * q^94 + 16 * q^95 - 2 * q^96

## Character values

We give the values of $$\chi$$ on generators for $$\left(\mathbb{Z}/930\mathbb{Z}\right)^\times$$.

 $$n$$ $$187$$ $$311$$ $$871$$ $$\chi(n)$$ $$-1$$ $$1$$ $$1$$

## 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 $$\iota_m(\nu)$$ $$a_{2}$$ $$a_{3}$$ $$a_{4}$$ $$a_{5}$$ $$a_{6}$$ $$a_{7}$$ $$a_{8}$$ $$a_{9}$$ $$a_{10}$$
559.1
 1.00000i − 1.00000i
1.00000i 1.00000i −1.00000 2.00000 + 1.00000i −1.00000 2.00000i 1.00000i −1.00000 1.00000 2.00000i
559.2 1.00000i 1.00000i −1.00000 2.00000 1.00000i −1.00000 2.00000i 1.00000i −1.00000 1.00000 + 2.00000i
 $$n$$: e.g. 2-40 or 990-1000 Significant digits: Format: Complex embeddings Normalized embeddings Satake parameters Satake angles

## Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
5.b even 2 1 inner

## Twists

By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 930.2.d.d 2
3.b odd 2 1 2790.2.d.d 2
5.b even 2 1 inner 930.2.d.d 2
5.c odd 4 1 4650.2.a.u 1
5.c odd 4 1 4650.2.a.z 1
15.d odd 2 1 2790.2.d.d 2

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
930.2.d.d 2 1.a even 1 1 trivial
930.2.d.d 2 5.b even 2 1 inner
2790.2.d.d 2 3.b odd 2 1
2790.2.d.d 2 15.d odd 2 1
4650.2.a.u 1 5.c odd 4 1
4650.2.a.z 1 5.c odd 4 1

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(930, [\chi])$$:

 $$T_{7}^{2} + 4$$ T7^2 + 4 $$T_{11}$$ T11

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{2} + 1$$
$3$ $$T^{2} + 1$$
$5$ $$T^{2} - 4T + 5$$
$7$ $$T^{2} + 4$$
$11$ $$T^{2}$$
$13$ $$T^{2} + 4$$
$17$ $$T^{2}$$
$19$ $$(T - 4)^{2}$$
$23$ $$T^{2} + 4$$
$29$ $$(T - 10)^{2}$$
$31$ $$(T + 1)^{2}$$
$37$ $$T^{2} + 4$$
$41$ $$(T - 2)^{2}$$
$43$ $$T^{2} + 16$$
$47$ $$T^{2} + 16$$
$53$ $$T^{2} + 4$$
$59$ $$(T - 6)^{2}$$
$61$ $$(T + 8)^{2}$$
$67$ $$T^{2} + 64$$
$71$ $$(T + 8)^{2}$$
$73$ $$T^{2} + 100$$
$79$ $$(T + 12)^{2}$$
$83$ $$T^{2} + 16$$
$89$ $$(T - 14)^{2}$$
$97$ $$T^{2} + 16$$