# Properties

 Label 1872.4.a.bi Level $1872$ Weight $4$ Character orbit 1872.a Self dual yes Analytic conductor $110.452$ Analytic rank $0$ Dimension $2$ CM no Inner twists $1$

# Related objects

Show commands: Magma / PariGP / SageMath

## Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [1872,4,Mod(1,1872)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(1872, base_ring=CyclotomicField(2))

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

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

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

chi := DirichletCharacter("1872.1");

S:= CuspForms(chi, 4);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$1872 = 2^{4} \cdot 3^{2} \cdot 13$$ Weight: $$k$$ $$=$$ $$4$$ Character orbit: $$[\chi]$$ $$=$$ 1872.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: $$110.451575531$$ Analytic rank: $$0$$ Dimension: $$2$$ Coefficient field: $$\Q(\sqrt{17})$$ comment: defining polynomial  gp: f.mod \\ as an extension of the character field Defining polynomial: $$x^{2} - x - 4$$ x^2 - x - 4 Coefficient ring: $$\Z[a_1, \ldots, a_{5}]$$ Coefficient ring index: $$2$$ Twist minimal: no (minimal twist has level 312) 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)

Coefficients of the $$q$$-expansion are expressed in terms of $$\beta = \sqrt{17}$$. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q + ( - \beta + 9) q^{5} + (5 \beta + 5) q^{7}+O(q^{10})$$ q + (-b + 9) * q^5 + (5*b + 5) * q^7 $$q + ( - \beta + 9) q^{5} + (5 \beta + 5) q^{7} + (14 \beta + 2) q^{11} + 13 q^{13} + (12 \beta + 26) q^{17} + (11 \beta + 71) q^{19} + (12 \beta - 140) q^{23} + ( - 18 \beta - 27) q^{25} + ( - 6 \beta + 212) q^{29} + (33 \beta + 89) q^{31} + (40 \beta - 40) q^{35} + (54 \beta + 68) q^{37} + (19 \beta + 113) q^{41} + ( - 88 \beta + 36) q^{43} + ( - 120 \beta + 88) q^{47} + (50 \beta + 107) q^{49} + (8 \beta + 394) q^{53} + (124 \beta - 220) q^{55} + ( - 8 \beta + 364) q^{59} + ( - 38 \beta - 368) q^{61} + ( - 13 \beta + 117) q^{65} + ( - 107 \beta - 527) q^{67} + (78 \beta - 330) q^{71} + ( - 222 \beta + 12) q^{73} + (80 \beta + 1200) q^{77} + ( - 276 \beta - 20) q^{79} + (68 \beta + 672) q^{83} + (82 \beta + 30) q^{85} + ( - 219 \beta - 157) q^{89} + (65 \beta + 65) q^{91} + (28 \beta + 452) q^{95} + (10 \beta - 132) q^{97}+O(q^{100})$$ q + (-b + 9) * q^5 + (5*b + 5) * q^7 + (14*b + 2) * q^11 + 13 * q^13 + (12*b + 26) * q^17 + (11*b + 71) * q^19 + (12*b - 140) * q^23 + (-18*b - 27) * q^25 + (-6*b + 212) * q^29 + (33*b + 89) * q^31 + (40*b - 40) * q^35 + (54*b + 68) * q^37 + (19*b + 113) * q^41 + (-88*b + 36) * q^43 + (-120*b + 88) * q^47 + (50*b + 107) * q^49 + (8*b + 394) * q^53 + (124*b - 220) * q^55 + (-8*b + 364) * q^59 + (-38*b - 368) * q^61 + (-13*b + 117) * q^65 + (-107*b - 527) * q^67 + (78*b - 330) * q^71 + (-222*b + 12) * q^73 + (80*b + 1200) * q^77 + (-276*b - 20) * q^79 + (68*b + 672) * q^83 + (82*b + 30) * q^85 + (-219*b - 157) * q^89 + (65*b + 65) * q^91 + (28*b + 452) * q^95 + (10*b - 132) * q^97 $$\operatorname{Tr}(f)(q)$$ $$=$$ $$2 q + 18 q^{5} + 10 q^{7}+O(q^{10})$$ 2 * q + 18 * q^5 + 10 * q^7 $$2 q + 18 q^{5} + 10 q^{7} + 4 q^{11} + 26 q^{13} + 52 q^{17} + 142 q^{19} - 280 q^{23} - 54 q^{25} + 424 q^{29} + 178 q^{31} - 80 q^{35} + 136 q^{37} + 226 q^{41} + 72 q^{43} + 176 q^{47} + 214 q^{49} + 788 q^{53} - 440 q^{55} + 728 q^{59} - 736 q^{61} + 234 q^{65} - 1054 q^{67} - 660 q^{71} + 24 q^{73} + 2400 q^{77} - 40 q^{79} + 1344 q^{83} + 60 q^{85} - 314 q^{89} + 130 q^{91} + 904 q^{95} - 264 q^{97}+O(q^{100})$$ 2 * q + 18 * q^5 + 10 * q^7 + 4 * q^11 + 26 * q^13 + 52 * q^17 + 142 * q^19 - 280 * q^23 - 54 * q^25 + 424 * q^29 + 178 * q^31 - 80 * q^35 + 136 * q^37 + 226 * q^41 + 72 * q^43 + 176 * q^47 + 214 * q^49 + 788 * q^53 - 440 * q^55 + 728 * q^59 - 736 * q^61 + 234 * q^65 - 1054 * q^67 - 660 * q^71 + 24 * q^73 + 2400 * q^77 - 40 * q^79 + 1344 * q^83 + 60 * q^85 - 314 * q^89 + 130 * q^91 + 904 * q^95 - 264 * 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
 2.56155 −1.56155
0 0 0 4.87689 0 25.6155 0 0 0
1.2 0 0 0 13.1231 0 −15.6155 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
$$2$$ $$+1$$
$$3$$ $$-1$$
$$13$$ $$-1$$

## 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 1872.4.a.bi 2
3.b odd 2 1 624.4.a.j 2
4.b odd 2 1 936.4.a.j 2
12.b even 2 1 312.4.a.d 2
24.f even 2 1 2496.4.a.ba 2
24.h odd 2 1 2496.4.a.bj 2

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
312.4.a.d 2 12.b even 2 1
624.4.a.j 2 3.b odd 2 1
936.4.a.j 2 4.b odd 2 1
1872.4.a.bi 2 1.a even 1 1 trivial
2496.4.a.ba 2 24.f even 2 1
2496.4.a.bj 2 24.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 $$S_{4}^{\mathrm{new}}(\Gamma_0(1872))$$:

 $$T_{5}^{2} - 18T_{5} + 64$$ T5^2 - 18*T5 + 64 $$T_{7}^{2} - 10T_{7} - 400$$ T7^2 - 10*T7 - 400

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{2}$$
$3$ $$T^{2}$$
$5$ $$T^{2} - 18T + 64$$
$7$ $$T^{2} - 10T - 400$$
$11$ $$T^{2} - 4T - 3328$$
$13$ $$(T - 13)^{2}$$
$17$ $$T^{2} - 52T - 1772$$
$19$ $$T^{2} - 142T + 2984$$
$23$ $$T^{2} + 280T + 17152$$
$29$ $$T^{2} - 424T + 44332$$
$31$ $$T^{2} - 178T - 10592$$
$37$ $$T^{2} - 136T - 44948$$
$41$ $$T^{2} - 226T + 6632$$
$43$ $$T^{2} - 72T - 130352$$
$47$ $$T^{2} - 176T - 237056$$
$53$ $$T^{2} - 788T + 154148$$
$59$ $$T^{2} - 728T + 131408$$
$61$ $$T^{2} + 736T + 110876$$
$67$ $$T^{2} + 1054T + 83096$$
$71$ $$T^{2} + 660T + 5472$$
$73$ $$T^{2} - 24T - 837684$$
$79$ $$T^{2} + 40T - 1294592$$
$83$ $$T^{2} - 1344 T + 372976$$
$89$ $$T^{2} + 314T - 790688$$
$97$ $$T^{2} + 264T + 15724$$