# Properties

 Label 3920.2.a.bb Level $3920$ Weight $2$ Character orbit 3920.a Self dual yes Analytic conductor $31.301$ 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] = [3920,2,Mod(1,3920)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(3920, base_ring=CyclotomicField(2))

chi = DirichletCharacter(H, H._module([0, 0, 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("3920.1");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$3920 = 2^{4} \cdot 5 \cdot 7^{2}$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 3920.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: $$31.3013575923$$ Analytic rank: $$1$$ Dimension: $$1$$ Coefficient field: $$\mathbb{Q}$$ Coefficient ring: $$\mathbb{Z}$$ Coefficient ring index: $$1$$ Twist minimal: no (minimal twist has level 1960) 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)

 $$f(q)$$ $$=$$ $$q + q^{3} + q^{5} - 2 q^{9}+O(q^{10})$$ q + q^3 + q^5 - 2 * q^9 $$q + q^{3} + q^{5} - 2 q^{9} + 5 q^{11} - 7 q^{13} + q^{15} + 3 q^{17} - 2 q^{19} - 8 q^{23} + q^{25} - 5 q^{27} - 5 q^{29} - 10 q^{31} + 5 q^{33} + 4 q^{37} - 7 q^{39} + 6 q^{41} - 2 q^{43} - 2 q^{45} - 7 q^{47} + 3 q^{51} - 10 q^{53} + 5 q^{55} - 2 q^{57} - 10 q^{59} + 12 q^{61} - 7 q^{65} + 2 q^{67} - 8 q^{69} + 2 q^{73} + q^{75} + 7 q^{79} + q^{81} + 4 q^{83} + 3 q^{85} - 5 q^{87} + 8 q^{89} - 10 q^{93} - 2 q^{95} - 17 q^{97} - 10 q^{99}+O(q^{100})$$ q + q^3 + q^5 - 2 * q^9 + 5 * q^11 - 7 * q^13 + q^15 + 3 * q^17 - 2 * q^19 - 8 * q^23 + q^25 - 5 * q^27 - 5 * q^29 - 10 * q^31 + 5 * q^33 + 4 * q^37 - 7 * q^39 + 6 * q^41 - 2 * q^43 - 2 * q^45 - 7 * q^47 + 3 * q^51 - 10 * q^53 + 5 * q^55 - 2 * q^57 - 10 * q^59 + 12 * q^61 - 7 * q^65 + 2 * q^67 - 8 * q^69 + 2 * q^73 + q^75 + 7 * q^79 + q^81 + 4 * q^83 + 3 * q^85 - 5 * q^87 + 8 * q^89 - 10 * q^93 - 2 * q^95 - 17 * q^97 - 10 * q^99

## 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 1.00000 0 1.00000 0 0 0 −2.00000 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
$$2$$ $$1$$
$$5$$ $$-1$$
$$7$$ $$-1$$

## 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 3920.2.a.bb 1
4.b odd 2 1 1960.2.a.d 1
7.b odd 2 1 3920.2.a.o 1
20.d odd 2 1 9800.2.a.y 1
28.d even 2 1 1960.2.a.h yes 1
28.f even 6 2 1960.2.q.g 2
28.g odd 6 2 1960.2.q.l 2
140.c even 2 1 9800.2.a.m 1

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1960.2.a.d 1 4.b odd 2 1
1960.2.a.h yes 1 28.d even 2 1
1960.2.q.g 2 28.f even 6 2
1960.2.q.l 2 28.g odd 6 2
3920.2.a.o 1 7.b odd 2 1
3920.2.a.bb 1 1.a even 1 1 trivial
9800.2.a.m 1 140.c even 2 1
9800.2.a.y 1 20.d odd 2 1

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(\Gamma_0(3920))$$:

 $$T_{3} - 1$$ T3 - 1 $$T_{11} - 5$$ T11 - 5 $$T_{13} + 7$$ T13 + 7 $$T_{17} - 3$$ T17 - 3

## Hecke characteristic polynomials

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