# Properties

 Label 1872.2.by.a Level $1872$ Weight $2$ Character orbit 1872.by Analytic conductor $14.948$ Analytic rank $0$ Dimension $2$ CM discriminant -3 Inner twists $4$

# Related objects

Show commands: Magma / PariGP / SageMath

## Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [1872,2,Mod(433,1872)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(1872, base_ring=CyclotomicField(6))

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

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

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

chi := DirichletCharacter("1872.433");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$1872 = 2^{4} \cdot 3^{2} \cdot 13$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 1872.by (of order $$6$$, degree $$2$$, 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: $$14.9479952584$$ 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: $$\Z[a_1, \ldots, a_{19}]$$ Coefficient ring index: $$1$$ Twist minimal: no (minimal twist has level 117) Sato-Tate group: $\mathrm{U}(1)[D_{6}]$

## $q$-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.

 $$f(q)$$ $$=$$ $$q + (3 \zeta_{6} - 6) q^{7}+O(q^{10})$$ q + (3*z - 6) * q^7 $$q + (3 \zeta_{6} - 6) q^{7} + (3 \zeta_{6} - 4) q^{13} + ( - 2 \zeta_{6} + 4) q^{19} + 5 q^{25} + ( - 10 \zeta_{6} + 5) q^{31} + ( - 4 \zeta_{6} - 4) q^{37} - 13 \zeta_{6} q^{43} + ( - 20 \zeta_{6} + 20) q^{49} - 13 \zeta_{6} q^{61} + (7 \zeta_{6} + 7) q^{67} + (2 \zeta_{6} - 1) q^{73} - 13 q^{79} + ( - 21 \zeta_{6} + 15) q^{91} + (11 \zeta_{6} - 22) q^{97} +O(q^{100})$$ q + (3*z - 6) * q^7 + (3*z - 4) * q^13 + (-2*z + 4) * q^19 + 5 * q^25 + (-10*z + 5) * q^31 + (-4*z - 4) * q^37 - 13*z * q^43 + (-20*z + 20) * q^49 - 13*z * q^61 + (7*z + 7) * q^67 + (2*z - 1) * q^73 - 13 * q^79 + (-21*z + 15) * q^91 + (11*z - 22) * q^97 $$\operatorname{Tr}(f)(q)$$ $$=$$ $$2 q - 9 q^{7}+O(q^{10})$$ 2 * q - 9 * q^7 $$2 q - 9 q^{7} - 5 q^{13} + 6 q^{19} + 10 q^{25} - 12 q^{37} - 13 q^{43} + 20 q^{49} - 13 q^{61} + 21 q^{67} - 26 q^{79} + 9 q^{91} - 33 q^{97}+O(q^{100})$$ 2 * q - 9 * q^7 - 5 * q^13 + 6 * q^19 + 10 * q^25 - 12 * q^37 - 13 * q^43 + 20 * q^49 - 13 * q^61 + 21 * q^67 - 26 * q^79 + 9 * q^91 - 33 * q^97

## Character values

We give the values of $$\chi$$ on generators for $$\left(\mathbb{Z}/1872\mathbb{Z}\right)^\times$$.

 $$n$$ $$145$$ $$209$$ $$469$$ $$703$$ $$\chi(n)$$ $$\zeta_{6}$$ $$1$$ $$1$$ $$1$$

## 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 $$\iota_m(\nu)$$ $$a_{2}$$ $$a_{3}$$ $$a_{4}$$ $$a_{5}$$ $$a_{6}$$ $$a_{7}$$ $$a_{8}$$ $$a_{9}$$ $$a_{10}$$
433.1
 0.5 + 0.866025i 0.5 − 0.866025i
0 0 0 0 0 −4.50000 + 2.59808i 0 0 0
1297.1 0 0 0 0 0 −4.50000 2.59808i 0 0 0
 $$n$$: 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
3.b odd 2 1 CM by $$\Q(\sqrt{-3})$$
13.e even 6 1 inner
39.h odd 6 1 inner

## Twists

By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1872.2.by.a 2
3.b odd 2 1 CM 1872.2.by.a 2
4.b odd 2 1 117.2.q.b 2
12.b even 2 1 117.2.q.b 2
13.e even 6 1 inner 1872.2.by.a 2
39.h odd 6 1 inner 1872.2.by.a 2
52.i odd 6 1 117.2.q.b 2
52.i odd 6 1 1521.2.b.d 2
52.j odd 6 1 1521.2.b.d 2
52.l even 12 2 1521.2.a.i 2
156.p even 6 1 1521.2.b.d 2
156.r even 6 1 117.2.q.b 2
156.r even 6 1 1521.2.b.d 2
156.v odd 12 2 1521.2.a.i 2

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
117.2.q.b 2 4.b odd 2 1
117.2.q.b 2 12.b even 2 1
117.2.q.b 2 52.i odd 6 1
117.2.q.b 2 156.r even 6 1
1521.2.a.i 2 52.l even 12 2
1521.2.a.i 2 156.v odd 12 2
1521.2.b.d 2 52.i odd 6 1
1521.2.b.d 2 52.j odd 6 1
1521.2.b.d 2 156.p even 6 1
1521.2.b.d 2 156.r even 6 1
1872.2.by.a 2 1.a even 1 1 trivial
1872.2.by.a 2 3.b odd 2 1 CM
1872.2.by.a 2 13.e even 6 1 inner
1872.2.by.a 2 39.h odd 6 1 inner

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(1872, [\chi])$$:

 $$T_{5}$$ T5 $$T_{7}^{2} + 9T_{7} + 27$$ T7^2 + 9*T7 + 27

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{2}$$
$3$ $$T^{2}$$
$5$ $$T^{2}$$
$7$ $$T^{2} + 9T + 27$$
$11$ $$T^{2}$$
$13$ $$T^{2} + 5T + 13$$
$17$ $$T^{2}$$
$19$ $$T^{2} - 6T + 12$$
$23$ $$T^{2}$$
$29$ $$T^{2}$$
$31$ $$T^{2} + 75$$
$37$ $$T^{2} + 12T + 48$$
$41$ $$T^{2}$$
$43$ $$T^{2} + 13T + 169$$
$47$ $$T^{2}$$
$53$ $$T^{2}$$
$59$ $$T^{2}$$
$61$ $$T^{2} + 13T + 169$$
$67$ $$T^{2} - 21T + 147$$
$71$ $$T^{2}$$
$73$ $$T^{2} + 3$$
$79$ $$(T + 13)^{2}$$
$83$ $$T^{2}$$
$89$ $$T^{2}$$
$97$ $$T^{2} + 33T + 363$$