# Properties

 Label 390.2.i.f Level $390$ Weight $2$ Character orbit 390.i Analytic conductor $3.114$ Analytic rank $0$ Dimension $2$ Inner twists $2$

# Related objects

Show commands: Magma / PariGP / SageMath

## Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [390,2,Mod(61,390)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(390, base_ring=CyclotomicField(6))

chi = DirichletCharacter(H, H._module([0, 0, 4]))

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

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

chi := DirichletCharacter("390.61");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$390 = 2 \cdot 3 \cdot 5 \cdot 13$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 390.i (of order $$3$$, degree $$2$$, 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: $$3.11416567883$$ Analytic rank: $$0$$ Dimension: $$2$$ Coefficient field: $$\Q(\sqrt{-3})$$ comment: defining polynomial  gp: f.mod \\ as an extension of the character field Defining polynomial: $$x^{2} - x + 1$$ x^2 - x + 1 Coefficient ring: $$\Z[a_1, a_2]$$ Coefficient ring index: $$1$$ Twist minimal: yes Sato-Tate group: $\mathrm{SU}(2)[C_{3}]$

## $q$-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 a primitive root of unity $$\zeta_{6}$$. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q + ( - \zeta_{6} + 1) q^{2} + ( - \zeta_{6} + 1) q^{3} - \zeta_{6} q^{4} + q^{5} - \zeta_{6} q^{6} + 2 \zeta_{6} q^{7} - q^{8} - \zeta_{6} q^{9} +O(q^{10})$$ q + (-z + 1) * q^2 + (-z + 1) * q^3 - z * q^4 + q^5 - z * q^6 + 2*z * q^7 - q^8 - z * q^9 $$q + ( - \zeta_{6} + 1) q^{2} + ( - \zeta_{6} + 1) q^{3} - \zeta_{6} q^{4} + q^{5} - \zeta_{6} q^{6} + 2 \zeta_{6} q^{7} - q^{8} - \zeta_{6} q^{9} + ( - \zeta_{6} + 1) q^{10} + ( - 5 \zeta_{6} + 5) q^{11} - q^{12} + ( - 4 \zeta_{6} + 1) q^{13} + 2 q^{14} + ( - \zeta_{6} + 1) q^{15} + (\zeta_{6} - 1) q^{16} + 2 \zeta_{6} q^{17} - q^{18} + 2 \zeta_{6} q^{19} - \zeta_{6} q^{20} + 2 q^{21} - 5 \zeta_{6} q^{22} + ( - \zeta_{6} + 1) q^{23} + (\zeta_{6} - 1) q^{24} + q^{25} + ( - \zeta_{6} - 3) q^{26} - q^{27} + ( - 2 \zeta_{6} + 2) q^{28} + (5 \zeta_{6} - 5) q^{29} - \zeta_{6} q^{30} - 11 q^{31} + \zeta_{6} q^{32} - 5 \zeta_{6} q^{33} + 2 q^{34} + 2 \zeta_{6} q^{35} + (\zeta_{6} - 1) q^{36} + (3 \zeta_{6} - 3) q^{37} + 2 q^{38} + ( - \zeta_{6} - 3) q^{39} - q^{40} + ( - 2 \zeta_{6} + 2) q^{41} + ( - 2 \zeta_{6} + 2) q^{42} + 11 \zeta_{6} q^{43} - 5 q^{44} - \zeta_{6} q^{45} - \zeta_{6} q^{46} + 9 q^{47} + \zeta_{6} q^{48} + ( - 3 \zeta_{6} + 3) q^{49} + ( - \zeta_{6} + 1) q^{50} + 2 q^{51} + (3 \zeta_{6} - 4) q^{52} + 6 q^{53} + (\zeta_{6} - 1) q^{54} + ( - 5 \zeta_{6} + 5) q^{55} - 2 \zeta_{6} q^{56} + 2 q^{57} + 5 \zeta_{6} q^{58} + 15 \zeta_{6} q^{59} - q^{60} - 10 \zeta_{6} q^{61} + (11 \zeta_{6} - 11) q^{62} + ( - 2 \zeta_{6} + 2) q^{63} + q^{64} + ( - 4 \zeta_{6} + 1) q^{65} - 5 q^{66} + (16 \zeta_{6} - 16) q^{67} + ( - 2 \zeta_{6} + 2) q^{68} - \zeta_{6} q^{69} + 2 q^{70} + \zeta_{6} q^{72} - 6 q^{73} + 3 \zeta_{6} q^{74} + ( - \zeta_{6} + 1) q^{75} + ( - 2 \zeta_{6} + 2) q^{76} + 10 q^{77} + (3 \zeta_{6} - 4) q^{78} - 11 q^{79} + (\zeta_{6} - 1) q^{80} + (\zeta_{6} - 1) q^{81} - 2 \zeta_{6} q^{82} + 6 q^{83} - 2 \zeta_{6} q^{84} + 2 \zeta_{6} q^{85} + 11 q^{86} + 5 \zeta_{6} q^{87} + (5 \zeta_{6} - 5) q^{88} + (2 \zeta_{6} - 2) q^{89} - q^{90} + ( - 6 \zeta_{6} + 8) q^{91} - q^{92} + (11 \zeta_{6} - 11) q^{93} + ( - 9 \zeta_{6} + 9) q^{94} + 2 \zeta_{6} q^{95} + q^{96} + 2 \zeta_{6} q^{97} - 3 \zeta_{6} q^{98} - 5 q^{99} +O(q^{100})$$ q + (-z + 1) * q^2 + (-z + 1) * q^3 - z * q^4 + q^5 - z * q^6 + 2*z * q^7 - q^8 - z * q^9 + (-z + 1) * q^10 + (-5*z + 5) * q^11 - q^12 + (-4*z + 1) * q^13 + 2 * q^14 + (-z + 1) * q^15 + (z - 1) * q^16 + 2*z * q^17 - q^18 + 2*z * q^19 - z * q^20 + 2 * q^21 - 5*z * q^22 + (-z + 1) * q^23 + (z - 1) * q^24 + q^25 + (-z - 3) * q^26 - q^27 + (-2*z + 2) * q^28 + (5*z - 5) * q^29 - z * q^30 - 11 * q^31 + z * q^32 - 5*z * q^33 + 2 * q^34 + 2*z * q^35 + (z - 1) * q^36 + (3*z - 3) * q^37 + 2 * q^38 + (-z - 3) * q^39 - q^40 + (-2*z + 2) * q^41 + (-2*z + 2) * q^42 + 11*z * q^43 - 5 * q^44 - z * q^45 - z * q^46 + 9 * q^47 + z * q^48 + (-3*z + 3) * q^49 + (-z + 1) * q^50 + 2 * q^51 + (3*z - 4) * q^52 + 6 * q^53 + (z - 1) * q^54 + (-5*z + 5) * q^55 - 2*z * q^56 + 2 * q^57 + 5*z * q^58 + 15*z * q^59 - q^60 - 10*z * q^61 + (11*z - 11) * q^62 + (-2*z + 2) * q^63 + q^64 + (-4*z + 1) * q^65 - 5 * q^66 + (16*z - 16) * q^67 + (-2*z + 2) * q^68 - z * q^69 + 2 * q^70 + z * q^72 - 6 * q^73 + 3*z * q^74 + (-z + 1) * q^75 + (-2*z + 2) * q^76 + 10 * q^77 + (3*z - 4) * q^78 - 11 * q^79 + (z - 1) * q^80 + (z - 1) * q^81 - 2*z * q^82 + 6 * q^83 - 2*z * q^84 + 2*z * q^85 + 11 * q^86 + 5*z * q^87 + (5*z - 5) * q^88 + (2*z - 2) * q^89 - q^90 + (-6*z + 8) * q^91 - q^92 + (11*z - 11) * q^93 + (-9*z + 9) * q^94 + 2*z * q^95 + q^96 + 2*z * q^97 - 3*z * q^98 - 5 * q^99 $$\operatorname{Tr}(f)(q)$$ $$=$$ $$2 q + q^{2} + q^{3} - q^{4} + 2 q^{5} - q^{6} + 2 q^{7} - 2 q^{8} - q^{9}+O(q^{10})$$ 2 * q + q^2 + q^3 - q^4 + 2 * q^5 - q^6 + 2 * q^7 - 2 * q^8 - q^9 $$2 q + q^{2} + q^{3} - q^{4} + 2 q^{5} - q^{6} + 2 q^{7} - 2 q^{8} - q^{9} + q^{10} + 5 q^{11} - 2 q^{12} - 2 q^{13} + 4 q^{14} + q^{15} - q^{16} + 2 q^{17} - 2 q^{18} + 2 q^{19} - q^{20} + 4 q^{21} - 5 q^{22} + q^{23} - q^{24} + 2 q^{25} - 7 q^{26} - 2 q^{27} + 2 q^{28} - 5 q^{29} - q^{30} - 22 q^{31} + q^{32} - 5 q^{33} + 4 q^{34} + 2 q^{35} - q^{36} - 3 q^{37} + 4 q^{38} - 7 q^{39} - 2 q^{40} + 2 q^{41} + 2 q^{42} + 11 q^{43} - 10 q^{44} - q^{45} - q^{46} + 18 q^{47} + q^{48} + 3 q^{49} + q^{50} + 4 q^{51} - 5 q^{52} + 12 q^{53} - q^{54} + 5 q^{55} - 2 q^{56} + 4 q^{57} + 5 q^{58} + 15 q^{59} - 2 q^{60} - 10 q^{61} - 11 q^{62} + 2 q^{63} + 2 q^{64} - 2 q^{65} - 10 q^{66} - 16 q^{67} + 2 q^{68} - q^{69} + 4 q^{70} + q^{72} - 12 q^{73} + 3 q^{74} + q^{75} + 2 q^{76} + 20 q^{77} - 5 q^{78} - 22 q^{79} - q^{80} - q^{81} - 2 q^{82} + 12 q^{83} - 2 q^{84} + 2 q^{85} + 22 q^{86} + 5 q^{87} - 5 q^{88} - 2 q^{89} - 2 q^{90} + 10 q^{91} - 2 q^{92} - 11 q^{93} + 9 q^{94} + 2 q^{95} + 2 q^{96} + 2 q^{97} - 3 q^{98} - 10 q^{99}+O(q^{100})$$ 2 * q + q^2 + q^3 - q^4 + 2 * q^5 - q^6 + 2 * q^7 - 2 * q^8 - q^9 + q^10 + 5 * q^11 - 2 * q^12 - 2 * q^13 + 4 * q^14 + q^15 - q^16 + 2 * q^17 - 2 * q^18 + 2 * q^19 - q^20 + 4 * q^21 - 5 * q^22 + q^23 - q^24 + 2 * q^25 - 7 * q^26 - 2 * q^27 + 2 * q^28 - 5 * q^29 - q^30 - 22 * q^31 + q^32 - 5 * q^33 + 4 * q^34 + 2 * q^35 - q^36 - 3 * q^37 + 4 * q^38 - 7 * q^39 - 2 * q^40 + 2 * q^41 + 2 * q^42 + 11 * q^43 - 10 * q^44 - q^45 - q^46 + 18 * q^47 + q^48 + 3 * q^49 + q^50 + 4 * q^51 - 5 * q^52 + 12 * q^53 - q^54 + 5 * q^55 - 2 * q^56 + 4 * q^57 + 5 * q^58 + 15 * q^59 - 2 * q^60 - 10 * q^61 - 11 * q^62 + 2 * q^63 + 2 * q^64 - 2 * q^65 - 10 * q^66 - 16 * q^67 + 2 * q^68 - q^69 + 4 * q^70 + q^72 - 12 * q^73 + 3 * q^74 + q^75 + 2 * q^76 + 20 * q^77 - 5 * q^78 - 22 * q^79 - q^80 - q^81 - 2 * q^82 + 12 * q^83 - 2 * q^84 + 2 * q^85 + 22 * q^86 + 5 * q^87 - 5 * q^88 - 2 * q^89 - 2 * q^90 + 10 * q^91 - 2 * q^92 - 11 * q^93 + 9 * q^94 + 2 * q^95 + 2 * q^96 + 2 * q^97 - 3 * q^98 - 10 * q^99

## Character values

We give the values of $$\chi$$ on generators for $$\left(\mathbb{Z}/390\mathbb{Z}\right)^\times$$.

 $$n$$ $$131$$ $$157$$ $$301$$ $$\chi(n)$$ $$1$$ $$1$$ $$-\zeta_{6}$$

## 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   $$\iota_m(\nu)$$ $$a_{2}$$ $$a_{3}$$ $$a_{4}$$ $$a_{5}$$ $$a_{6}$$ $$a_{7}$$ $$a_{8}$$ $$a_{9}$$ $$a_{10}$$
61.1
 0.5 + 0.866025i 0.5 − 0.866025i
0.500000 0.866025i 0.500000 0.866025i −0.500000 0.866025i 1.00000 −0.500000 0.866025i 1.00000 + 1.73205i −1.00000 −0.500000 0.866025i 0.500000 0.866025i
211.1 0.500000 + 0.866025i 0.500000 + 0.866025i −0.500000 + 0.866025i 1.00000 −0.500000 + 0.866025i 1.00000 1.73205i −1.00000 −0.500000 + 0.866025i 0.500000 + 0.866025i
 $$n$$: 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
13.c even 3 1 inner

## Twists

By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 390.2.i.f 2
3.b odd 2 1 1170.2.i.a 2
5.b even 2 1 1950.2.i.d 2
5.c odd 4 2 1950.2.z.e 4
13.c even 3 1 inner 390.2.i.f 2
13.c even 3 1 5070.2.a.d 1
13.e even 6 1 5070.2.a.p 1
13.f odd 12 2 5070.2.b.h 2
39.i odd 6 1 1170.2.i.a 2
65.n even 6 1 1950.2.i.d 2
65.q odd 12 2 1950.2.z.e 4

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
390.2.i.f 2 1.a even 1 1 trivial
390.2.i.f 2 13.c even 3 1 inner
1170.2.i.a 2 3.b odd 2 1
1170.2.i.a 2 39.i odd 6 1
1950.2.i.d 2 5.b even 2 1
1950.2.i.d 2 65.n even 6 1
1950.2.z.e 4 5.c odd 4 2
1950.2.z.e 4 65.q odd 12 2
5070.2.a.d 1 13.c even 3 1
5070.2.a.p 1 13.e even 6 1
5070.2.b.h 2 13.f odd 12 2

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(390, [\chi])$$:

 $$T_{7}^{2} - 2T_{7} + 4$$ T7^2 - 2*T7 + 4 $$T_{11}^{2} - 5T_{11} + 25$$ T11^2 - 5*T11 + 25

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{2} - T + 1$$
$3$ $$T^{2} - T + 1$$
$5$ $$(T - 1)^{2}$$
$7$ $$T^{2} - 2T + 4$$
$11$ $$T^{2} - 5T + 25$$
$13$ $$T^{2} + 2T + 13$$
$17$ $$T^{2} - 2T + 4$$
$19$ $$T^{2} - 2T + 4$$
$23$ $$T^{2} - T + 1$$
$29$ $$T^{2} + 5T + 25$$
$31$ $$(T + 11)^{2}$$
$37$ $$T^{2} + 3T + 9$$
$41$ $$T^{2} - 2T + 4$$
$43$ $$T^{2} - 11T + 121$$
$47$ $$(T - 9)^{2}$$
$53$ $$(T - 6)^{2}$$
$59$ $$T^{2} - 15T + 225$$
$61$ $$T^{2} + 10T + 100$$
$67$ $$T^{2} + 16T + 256$$
$71$ $$T^{2}$$
$73$ $$(T + 6)^{2}$$
$79$ $$(T + 11)^{2}$$
$83$ $$(T - 6)^{2}$$
$89$ $$T^{2} + 2T + 4$$
$97$ $$T^{2} - 2T + 4$$