# Properties

 Label 1840.2.a.f Level $1840$ Weight $2$ Character orbit 1840.a Self dual yes Analytic conductor $14.692$ 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] = [1840,2,Mod(1,1840)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(1840, 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("1840.1");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$1840 = 2^{4} \cdot 5 \cdot 23$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 1840.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: $$14.6924739719$$ Analytic rank: $$0$$ Dimension: $$1$$ Coefficient field: $$\mathbb{Q}$$ Coefficient ring: $$\mathbb{Z}$$ Coefficient ring index: $$1$$ Twist minimal: no (minimal twist has level 920) 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)

 $$f(q)$$ $$=$$ $$q + q^{5} - q^{7} - 3 q^{9}+O(q^{10})$$ q + q^5 - q^7 - 3 * q^9 $$q + q^{5} - q^{7} - 3 q^{9} + 6 q^{11} - 2 q^{13} - 3 q^{17} + 6 q^{19} - q^{23} + q^{25} + 3 q^{29} + 3 q^{31} - q^{35} + q^{37} + 9 q^{41} + 8 q^{43} - 3 q^{45} - 4 q^{47} - 6 q^{49} + q^{53} + 6 q^{55} - q^{59} + 8 q^{61} + 3 q^{63} - 2 q^{65} + 7 q^{67} + 5 q^{71} - 6 q^{73} - 6 q^{77} + 9 q^{81} + 11 q^{83} - 3 q^{85} + 4 q^{89} + 2 q^{91} + 6 q^{95} + 6 q^{97} - 18 q^{99}+O(q^{100})$$ q + q^5 - q^7 - 3 * q^9 + 6 * q^11 - 2 * q^13 - 3 * q^17 + 6 * q^19 - q^23 + q^25 + 3 * q^29 + 3 * q^31 - q^35 + q^37 + 9 * q^41 + 8 * q^43 - 3 * q^45 - 4 * q^47 - 6 * q^49 + q^53 + 6 * q^55 - q^59 + 8 * q^61 + 3 * q^63 - 2 * q^65 + 7 * q^67 + 5 * q^71 - 6 * q^73 - 6 * q^77 + 9 * q^81 + 11 * q^83 - 3 * q^85 + 4 * q^89 + 2 * q^91 + 6 * q^95 + 6 * q^97 - 18 * 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 0 0 1.00000 0 −1.00000 0 −3.00000 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
$$2$$ $$1$$
$$5$$ $$-1$$
$$23$$ $$1$$

## 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 1840.2.a.f 1
4.b odd 2 1 920.2.a.c 1
5.b even 2 1 9200.2.a.w 1
8.b even 2 1 7360.2.a.k 1
8.d odd 2 1 7360.2.a.l 1
12.b even 2 1 8280.2.a.j 1
20.d odd 2 1 4600.2.a.h 1
20.e even 4 2 4600.2.e.j 2

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
920.2.a.c 1 4.b odd 2 1
1840.2.a.f 1 1.a even 1 1 trivial
4600.2.a.h 1 20.d odd 2 1
4600.2.e.j 2 20.e even 4 2
7360.2.a.k 1 8.b even 2 1
7360.2.a.l 1 8.d odd 2 1
8280.2.a.j 1 12.b even 2 1
9200.2.a.w 1 5.b even 2 1

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(\Gamma_0(1840))$$:

 $$T_{3}$$ T3 $$T_{7} + 1$$ T7 + 1 $$T_{11} - 6$$ T11 - 6

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T$$
$3$ $$T$$
$5$ $$T - 1$$
$7$ $$T + 1$$
$11$ $$T - 6$$
$13$ $$T + 2$$
$17$ $$T + 3$$
$19$ $$T - 6$$
$23$ $$T + 1$$
$29$ $$T - 3$$
$31$ $$T - 3$$
$37$ $$T - 1$$
$41$ $$T - 9$$
$43$ $$T - 8$$
$47$ $$T + 4$$
$53$ $$T - 1$$
$59$ $$T + 1$$
$61$ $$T - 8$$
$67$ $$T - 7$$
$71$ $$T - 5$$
$73$ $$T + 6$$
$79$ $$T$$
$83$ $$T - 11$$
$89$ $$T - 4$$
$97$ $$T - 6$$