# Properties

 Label 1800.4.f.v Level $1800$ Weight $4$ Character orbit 1800.f Analytic conductor $106.203$ Analytic rank $0$ Dimension $2$ CM no Inner twists $2$

# Related objects

Show commands: Magma / PariGP / SageMath

## Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [1800,4,Mod(649,1800)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(1800, base_ring=CyclotomicField(2))

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

N = Newforms(chi, 4, names="a")

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

chi := DirichletCharacter("1800.649");

S:= CuspForms(chi, 4);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$1800 = 2^{3} \cdot 3^{2} \cdot 5^{2}$$ Weight: $$k$$ $$=$$ $$4$$ Character orbit: $$[\chi]$$ $$=$$ 1800.f (of order $$2$$, degree $$1$$, 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: $$106.203438010$$ Analytic rank: $$0$$ Dimension: $$2$$ Coefficient field: $$\Q(\sqrt{-1})$$ comment: defining polynomial  gp: f.mod \\ as an extension of the character field Defining polynomial: $$x^{2} + 1$$ x^2 + 1 Coefficient ring: $$\Z[a_1, \ldots, a_{13}]$$ Coefficient ring index: $$2$$ Twist minimal: no (minimal twist has level 120) Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

## $q$-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 $$\beta = 2i$$. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q + 10 \beta q^{7}+O(q^{10})$$ q + 10*b * q^7 $$q + 10 \beta q^{7} + 56 q^{11} + 43 \beta q^{13} + 53 \beta q^{17} - 4 q^{19} + 68 \beta q^{23} - 206 q^{29} - 152 q^{31} + 141 \beta q^{37} + 246 q^{41} - 206 \beta q^{43} - 20 \beta q^{47} - 57 q^{49} - 63 \beta q^{53} + 56 q^{59} - 2 q^{61} - 194 \beta q^{67} + 672 q^{71} - 585 \beta q^{73} + 560 \beta q^{77} - 408 q^{79} + 334 \beta q^{83} + 66 q^{89} - 1720 q^{91} - 463 \beta q^{97} +O(q^{100})$$ q + 10*b * q^7 + 56 * q^11 + 43*b * q^13 + 53*b * q^17 - 4 * q^19 + 68*b * q^23 - 206 * q^29 - 152 * q^31 + 141*b * q^37 + 246 * q^41 - 206*b * q^43 - 20*b * q^47 - 57 * q^49 - 63*b * q^53 + 56 * q^59 - 2 * q^61 - 194*b * q^67 + 672 * q^71 - 585*b * q^73 + 560*b * q^77 - 408 * q^79 + 334*b * q^83 + 66 * q^89 - 1720 * q^91 - 463*b * q^97 $$\operatorname{Tr}(f)(q)$$ $$=$$ $$2 q+O(q^{10})$$ 2 * q $$2 q + 112 q^{11} - 8 q^{19} - 412 q^{29} - 304 q^{31} + 492 q^{41} - 114 q^{49} + 112 q^{59} - 4 q^{61} + 1344 q^{71} - 816 q^{79} + 132 q^{89} - 3440 q^{91}+O(q^{100})$$ 2 * q + 112 * q^11 - 8 * q^19 - 412 * q^29 - 304 * q^31 + 492 * q^41 - 114 * q^49 + 112 * q^59 - 4 * q^61 + 1344 * q^71 - 816 * q^79 + 132 * q^89 - 3440 * q^91

## Character values

We give the values of $$\chi$$ on generators for $$\left(\mathbb{Z}/1800\mathbb{Z}\right)^\times$$.

 $$n$$ $$577$$ $$901$$ $$1001$$ $$1351$$ $$\chi(n)$$ $$-1$$ $$1$$ $$1$$ $$1$$

## 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   $$\iota_m(\nu)$$ $$a_{2}$$ $$a_{3}$$ $$a_{4}$$ $$a_{5}$$ $$a_{6}$$ $$a_{7}$$ $$a_{8}$$ $$a_{9}$$ $$a_{10}$$
649.1
 − 1.00000i 1.00000i
0 0 0 0 0 20.0000i 0 0 0
649.2 0 0 0 0 0 20.0000i 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
5.b even 2 1 inner

## Twists

By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1800.4.f.v 2
3.b odd 2 1 600.4.f.a 2
5.b even 2 1 inner 1800.4.f.v 2
5.c odd 4 1 360.4.a.n 1
5.c odd 4 1 1800.4.a.f 1
12.b even 2 1 1200.4.f.t 2
15.d odd 2 1 600.4.f.a 2
15.e even 4 1 120.4.a.b 1
15.e even 4 1 600.4.a.i 1
20.e even 4 1 720.4.a.q 1
60.h even 2 1 1200.4.f.t 2
60.l odd 4 1 240.4.a.g 1
60.l odd 4 1 1200.4.a.p 1
120.q odd 4 1 960.4.a.k 1
120.w even 4 1 960.4.a.bj 1

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
120.4.a.b 1 15.e even 4 1
240.4.a.g 1 60.l odd 4 1
360.4.a.n 1 5.c odd 4 1
600.4.a.i 1 15.e even 4 1
600.4.f.a 2 3.b odd 2 1
600.4.f.a 2 15.d odd 2 1
720.4.a.q 1 20.e even 4 1
960.4.a.k 1 120.q odd 4 1
960.4.a.bj 1 120.w even 4 1
1200.4.a.p 1 60.l odd 4 1
1200.4.f.t 2 12.b even 2 1
1200.4.f.t 2 60.h even 2 1
1800.4.a.f 1 5.c odd 4 1
1800.4.f.v 2 1.a even 1 1 trivial
1800.4.f.v 2 5.b even 2 1 inner

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{4}^{\mathrm{new}}(1800, [\chi])$$:

 $$T_{7}^{2} + 400$$ T7^2 + 400 $$T_{11} - 56$$ T11 - 56

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{2}$$
$3$ $$T^{2}$$
$5$ $$T^{2}$$
$7$ $$T^{2} + 400$$
$11$ $$(T - 56)^{2}$$
$13$ $$T^{2} + 7396$$
$17$ $$T^{2} + 11236$$
$19$ $$(T + 4)^{2}$$
$23$ $$T^{2} + 18496$$
$29$ $$(T + 206)^{2}$$
$31$ $$(T + 152)^{2}$$
$37$ $$T^{2} + 79524$$
$41$ $$(T - 246)^{2}$$
$43$ $$T^{2} + 169744$$
$47$ $$T^{2} + 1600$$
$53$ $$T^{2} + 15876$$
$59$ $$(T - 56)^{2}$$
$61$ $$(T + 2)^{2}$$
$67$ $$T^{2} + 150544$$
$71$ $$(T - 672)^{2}$$
$73$ $$T^{2} + 1368900$$
$79$ $$(T + 408)^{2}$$
$83$ $$T^{2} + 446224$$
$89$ $$(T - 66)^{2}$$
$97$ $$T^{2} + 857476$$