# Properties

 Label 7840.2.a.e Level $7840$ Weight $2$ Character orbit 7840.a Self dual yes Analytic conductor $62.603$ Analytic rank $0$ 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] = [7840,2,Mod(1,7840)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(7840, 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("7840.1");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$7840 = 2^{5} \cdot 5 \cdot 7^{2}$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 7840.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: $$62.6027151847$$ Analytic rank: $$0$$ Dimension: $$1$$ Coefficient field: $$\mathbb{Q}$$ Coefficient ring: $$\mathbb{Z}$$ Coefficient ring index: $$1$$ Twist minimal: no (minimal twist has level 160) 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)

 $$f(q)$$ $$=$$ $$q - 2 q^{3} + q^{5} + q^{9}+O(q^{10})$$ q - 2 * q^3 + q^5 + q^9 $$q - 2 q^{3} + q^{5} + q^{9} + 4 q^{11} + 6 q^{13} - 2 q^{15} - 2 q^{17} + 8 q^{19} + 6 q^{23} + q^{25} + 4 q^{27} - 2 q^{29} + 4 q^{31} - 8 q^{33} + 2 q^{37} - 12 q^{39} + 10 q^{41} + 2 q^{43} + q^{45} - 2 q^{47} + 4 q^{51} + 2 q^{53} + 4 q^{55} - 16 q^{57} - 2 q^{61} + 6 q^{65} + 6 q^{67} - 12 q^{69} + 12 q^{71} - 10 q^{73} - 2 q^{75} + 8 q^{79} - 11 q^{81} - 10 q^{83} - 2 q^{85} + 4 q^{87} + 6 q^{89} - 8 q^{93} + 8 q^{95} - 10 q^{97} + 4 q^{99}+O(q^{100})$$ q - 2 * q^3 + q^5 + q^9 + 4 * q^11 + 6 * q^13 - 2 * q^15 - 2 * q^17 + 8 * q^19 + 6 * q^23 + q^25 + 4 * q^27 - 2 * q^29 + 4 * q^31 - 8 * q^33 + 2 * q^37 - 12 * q^39 + 10 * q^41 + 2 * q^43 + q^45 - 2 * q^47 + 4 * q^51 + 2 * q^53 + 4 * q^55 - 16 * q^57 - 2 * q^61 + 6 * q^65 + 6 * q^67 - 12 * q^69 + 12 * q^71 - 10 * q^73 - 2 * q^75 + 8 * q^79 - 11 * q^81 - 10 * q^83 - 2 * q^85 + 4 * q^87 + 6 * q^89 - 8 * q^93 + 8 * q^95 - 10 * q^97 + 4 * 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 −2.00000 0 1.00000 0 0 0 1.00000 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 7840.2.a.e 1
4.b odd 2 1 7840.2.a.w 1
7.b odd 2 1 160.2.a.b yes 1
21.c even 2 1 1440.2.a.l 1
28.d even 2 1 160.2.a.a 1
35.c odd 2 1 800.2.a.a 1
35.f even 4 2 800.2.c.b 2
56.e even 2 1 320.2.a.e 1
56.h odd 2 1 320.2.a.b 1
84.h odd 2 1 1440.2.a.i 1
105.g even 2 1 7200.2.a.l 1
105.k odd 4 2 7200.2.f.g 2
112.j even 4 2 1280.2.d.h 2
112.l odd 4 2 1280.2.d.b 2
140.c even 2 1 800.2.a.i 1
140.j odd 4 2 800.2.c.a 2
168.e odd 2 1 2880.2.a.d 1
168.i even 2 1 2880.2.a.o 1
280.c odd 2 1 1600.2.a.t 1
280.n even 2 1 1600.2.a.e 1
280.s even 4 2 1600.2.c.c 2
280.y odd 4 2 1600.2.c.f 2
420.o odd 2 1 7200.2.a.bp 1
420.w even 4 2 7200.2.f.w 2

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
160.2.a.a 1 28.d even 2 1
160.2.a.b yes 1 7.b odd 2 1
320.2.a.b 1 56.h odd 2 1
320.2.a.e 1 56.e even 2 1
800.2.a.a 1 35.c odd 2 1
800.2.a.i 1 140.c even 2 1
800.2.c.a 2 140.j odd 4 2
800.2.c.b 2 35.f even 4 2
1280.2.d.b 2 112.l odd 4 2
1280.2.d.h 2 112.j even 4 2
1440.2.a.i 1 84.h odd 2 1
1440.2.a.l 1 21.c even 2 1
1600.2.a.e 1 280.n even 2 1
1600.2.a.t 1 280.c odd 2 1
1600.2.c.c 2 280.s even 4 2
1600.2.c.f 2 280.y odd 4 2
2880.2.a.d 1 168.e odd 2 1
2880.2.a.o 1 168.i even 2 1
7200.2.a.l 1 105.g even 2 1
7200.2.a.bp 1 420.o odd 2 1
7200.2.f.g 2 105.k odd 4 2
7200.2.f.w 2 420.w even 4 2
7840.2.a.e 1 1.a even 1 1 trivial
7840.2.a.w 1 4.b odd 2 1

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(\Gamma_0(7840))$$:

 $$T_{3} + 2$$ T3 + 2 $$T_{11} - 4$$ T11 - 4 $$T_{13} - 6$$ T13 - 6 $$T_{19} - 8$$ T19 - 8

## Hecke characteristic polynomials

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