# Properties

 Label 441.2.a.d Level $441$ Weight $2$ Character orbit 441.a Self dual yes Analytic conductor $3.521$ Analytic rank $1$ Dimension $1$ CM discriminant -3 Inner twists $2$

# Related objects

Show commands: Magma / PariGP / SageMath

## Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [441,2,Mod(1,441)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(441, 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("441.1");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$441 = 3^{2} \cdot 7^{2}$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 441.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: $$3.52140272914$$ Analytic rank: $$1$$ Dimension: $$1$$ Coefficient field: $$\mathbb{Q}$$ Coefficient ring: $$\mathbb{Z}$$ Coefficient ring index: $$1$$ Twist minimal: no (minimal twist has level 63) Fricke sign: $$+1$$ Sato-Tate group: $N(\mathrm{U}(1))$

## $q$-expansion

comment: q-expansion

sage: f.q_expansion() # note that sage often uses an isomorphic number field

gp: mfcoefs(f, 20)

 $$f(q)$$ $$=$$ $$q - 2 q^{4}+O(q^{10})$$ q - 2 * q^4 $$q - 2 q^{4} - 7 q^{13} + 4 q^{16} - 7 q^{19} - 5 q^{25} - 7 q^{31} - q^{37} + 5 q^{43} + 14 q^{52} + 14 q^{61} - 8 q^{64} + 11 q^{67} - 7 q^{73} + 14 q^{76} - 13 q^{79} + 14 q^{97}+O(q^{100})$$ q - 2 * q^4 - 7 * q^13 + 4 * q^16 - 7 * q^19 - 5 * q^25 - 7 * q^31 - q^37 + 5 * q^43 + 14 * q^52 + 14 * q^61 - 8 * q^64 + 11 * q^67 - 7 * q^73 + 14 * q^76 - 13 * q^79 + 14 * 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 0 −2.00000 0 0 0 0 0 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
$$3$$ $$+1$$
$$7$$ $$+1$$

## Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 CM by $$\Q(\sqrt{-3})$$

## Twists

By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 441.2.a.d 1
3.b odd 2 1 CM 441.2.a.d 1
4.b odd 2 1 7056.2.a.y 1
7.b odd 2 1 441.2.a.e 1
7.c even 3 2 63.2.e.a 2
7.d odd 6 2 441.2.e.c 2
12.b even 2 1 7056.2.a.y 1
21.c even 2 1 441.2.a.e 1
21.g even 6 2 441.2.e.c 2
21.h odd 6 2 63.2.e.a 2
28.d even 2 1 7056.2.a.bf 1
28.g odd 6 2 1008.2.s.j 2
63.g even 3 2 567.2.g.d 2
63.h even 3 2 567.2.h.c 2
63.j odd 6 2 567.2.h.c 2
63.n odd 6 2 567.2.g.d 2
84.h odd 2 1 7056.2.a.bf 1
84.n even 6 2 1008.2.s.j 2

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
63.2.e.a 2 7.c even 3 2
63.2.e.a 2 21.h odd 6 2
441.2.a.d 1 1.a even 1 1 trivial
441.2.a.d 1 3.b odd 2 1 CM
441.2.a.e 1 7.b odd 2 1
441.2.a.e 1 21.c even 2 1
441.2.e.c 2 7.d odd 6 2
441.2.e.c 2 21.g even 6 2
567.2.g.d 2 63.g even 3 2
567.2.g.d 2 63.n odd 6 2
567.2.h.c 2 63.h even 3 2
567.2.h.c 2 63.j odd 6 2
1008.2.s.j 2 28.g odd 6 2
1008.2.s.j 2 84.n even 6 2
7056.2.a.y 1 4.b odd 2 1
7056.2.a.y 1 12.b even 2 1
7056.2.a.bf 1 28.d even 2 1
7056.2.a.bf 1 84.h odd 2 1

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(\Gamma_0(441))$$:

 $$T_{2}$$ T2 $$T_{5}$$ T5 $$T_{13} + 7$$ T13 + 7

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T$$
$3$ $$T$$
$5$ $$T$$
$7$ $$T$$
$11$ $$T$$
$13$ $$T + 7$$
$17$ $$T$$
$19$ $$T + 7$$
$23$ $$T$$
$29$ $$T$$
$31$ $$T + 7$$
$37$ $$T + 1$$
$41$ $$T$$
$43$ $$T - 5$$
$47$ $$T$$
$53$ $$T$$
$59$ $$T$$
$61$ $$T - 14$$
$67$ $$T - 11$$
$71$ $$T$$
$73$ $$T + 7$$
$79$ $$T + 13$$
$83$ $$T$$
$89$ $$T$$
$97$ $$T - 14$$