# Properties

 Label 1568.2.a.k Level $1568$ Weight $2$ Character orbit 1568.a Self dual yes Analytic conductor $12.521$ Analytic rank $1$ 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] = [1568,2,Mod(1,1568)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(1568, base_ring=CyclotomicField(2))

chi = DirichletCharacter(H, H._module([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("1568.1");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$1568 = 2^{5} \cdot 7^{2}$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 1568.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: $$12.5205430369$$ Analytic rank: $$1$$ Dimension: $$2$$ Coefficient field: $$\Q(\sqrt{5})$$ comment: defining polynomial  gp: f.mod \\ as an extension of the character field Defining polynomial: $$x^{2} - x - 1$$ x^2 - x - 1 Coefficient ring: $$\Z[a_1, a_2, a_3]$$ Coefficient ring index: $$2$$ Twist minimal: no (minimal twist has level 224) 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 $$\beta = \sqrt{5}$$. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q + ( - \beta - 1) q^{3} + (\beta - 1) q^{5} + (2 \beta + 3) q^{9}+O(q^{10})$$ q + (-b - 1) * q^3 + (b - 1) * q^5 + (2*b + 3) * q^9 $$q + ( - \beta - 1) q^{3} + (\beta - 1) q^{5} + (2 \beta + 3) q^{9} + ( - 2 \beta + 2) q^{11} + ( - \beta - 3) q^{13} - 4 q^{15} + 2 \beta q^{17} + (\beta + 1) q^{19} - 4 q^{23} + ( - 2 \beta + 1) q^{25} + ( - 2 \beta - 10) q^{27} + 2 \beta q^{29} + (2 \beta + 2) q^{31} + 8 q^{33} + 2 \beta q^{37} + (4 \beta + 8) q^{39} + ( - 2 \beta + 4) q^{41} + (2 \beta - 2) q^{43} + (\beta + 7) q^{45} + ( - 2 \beta + 6) q^{47} + ( - 2 \beta - 10) q^{51} - 10 q^{53} + (4 \beta - 12) q^{55} + ( - 2 \beta - 6) q^{57} + (\beta - 7) q^{59} + (\beta - 9) q^{61} + ( - 2 \beta - 2) q^{65} - 4 q^{67} + (4 \beta + 4) q^{69} + ( - 4 \beta - 4) q^{71} + ( - 4 \beta - 6) q^{73} + (\beta + 9) q^{75} + (4 \beta - 4) q^{79} + (6 \beta + 11) q^{81} + (\beta - 7) q^{83} + ( - 2 \beta + 10) q^{85} + ( - 2 \beta - 10) q^{87} + 6 q^{89} + ( - 4 \beta - 12) q^{93} + 4 q^{95} + (2 \beta - 8) q^{97} + ( - 2 \beta - 14) q^{99}+O(q^{100})$$ q + (-b - 1) * q^3 + (b - 1) * q^5 + (2*b + 3) * q^9 + (-2*b + 2) * q^11 + (-b - 3) * q^13 - 4 * q^15 + 2*b * q^17 + (b + 1) * q^19 - 4 * q^23 + (-2*b + 1) * q^25 + (-2*b - 10) * q^27 + 2*b * q^29 + (2*b + 2) * q^31 + 8 * q^33 + 2*b * q^37 + (4*b + 8) * q^39 + (-2*b + 4) * q^41 + (2*b - 2) * q^43 + (b + 7) * q^45 + (-2*b + 6) * q^47 + (-2*b - 10) * q^51 - 10 * q^53 + (4*b - 12) * q^55 + (-2*b - 6) * q^57 + (b - 7) * q^59 + (b - 9) * q^61 + (-2*b - 2) * q^65 - 4 * q^67 + (4*b + 4) * q^69 + (-4*b - 4) * q^71 + (-4*b - 6) * q^73 + (b + 9) * q^75 + (4*b - 4) * q^79 + (6*b + 11) * q^81 + (b - 7) * q^83 + (-2*b + 10) * q^85 + (-2*b - 10) * q^87 + 6 * q^89 + (-4*b - 12) * q^93 + 4 * q^95 + (2*b - 8) * q^97 + (-2*b - 14) * q^99 $$\operatorname{Tr}(f)(q)$$ $$=$$ $$2 q - 2 q^{3} - 2 q^{5} + 6 q^{9}+O(q^{10})$$ 2 * q - 2 * q^3 - 2 * q^5 + 6 * q^9 $$2 q - 2 q^{3} - 2 q^{5} + 6 q^{9} + 4 q^{11} - 6 q^{13} - 8 q^{15} + 2 q^{19} - 8 q^{23} + 2 q^{25} - 20 q^{27} + 4 q^{31} + 16 q^{33} + 16 q^{39} + 8 q^{41} - 4 q^{43} + 14 q^{45} + 12 q^{47} - 20 q^{51} - 20 q^{53} - 24 q^{55} - 12 q^{57} - 14 q^{59} - 18 q^{61} - 4 q^{65} - 8 q^{67} + 8 q^{69} - 8 q^{71} - 12 q^{73} + 18 q^{75} - 8 q^{79} + 22 q^{81} - 14 q^{83} + 20 q^{85} - 20 q^{87} + 12 q^{89} - 24 q^{93} + 8 q^{95} - 16 q^{97} - 28 q^{99}+O(q^{100})$$ 2 * q - 2 * q^3 - 2 * q^5 + 6 * q^9 + 4 * q^11 - 6 * q^13 - 8 * q^15 + 2 * q^19 - 8 * q^23 + 2 * q^25 - 20 * q^27 + 4 * q^31 + 16 * q^33 + 16 * q^39 + 8 * q^41 - 4 * q^43 + 14 * q^45 + 12 * q^47 - 20 * q^51 - 20 * q^53 - 24 * q^55 - 12 * q^57 - 14 * q^59 - 18 * q^61 - 4 * q^65 - 8 * q^67 + 8 * q^69 - 8 * q^71 - 12 * q^73 + 18 * q^75 - 8 * q^79 + 22 * q^81 - 14 * q^83 + 20 * q^85 - 20 * q^87 + 12 * q^89 - 24 * q^93 + 8 * q^95 - 16 * q^97 - 28 * 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
 1.61803 −0.618034
0 −3.23607 0 1.23607 0 0 0 7.47214 0
1.2 0 1.23607 0 −3.23607 0 0 0 −1.47214 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
$$2$$ $$-1$$
$$7$$ $$-1$$

## 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 1568.2.a.k 2
4.b odd 2 1 1568.2.a.v 2
7.b odd 2 1 224.2.a.d yes 2
7.c even 3 2 1568.2.i.w 4
7.d odd 6 2 1568.2.i.m 4
8.b even 2 1 3136.2.a.by 2
8.d odd 2 1 3136.2.a.bf 2
21.c even 2 1 2016.2.a.o 2
28.d even 2 1 224.2.a.c 2
28.f even 6 2 1568.2.i.v 4
28.g odd 6 2 1568.2.i.n 4
35.c odd 2 1 5600.2.a.z 2
56.e even 2 1 448.2.a.j 2
56.h odd 2 1 448.2.a.i 2
84.h odd 2 1 2016.2.a.r 2
112.j even 4 2 1792.2.b.k 4
112.l odd 4 2 1792.2.b.m 4
140.c even 2 1 5600.2.a.bk 2
168.e odd 2 1 4032.2.a.bw 2
168.i even 2 1 4032.2.a.bv 2

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
224.2.a.c 2 28.d even 2 1
224.2.a.d yes 2 7.b odd 2 1
448.2.a.i 2 56.h odd 2 1
448.2.a.j 2 56.e even 2 1
1568.2.a.k 2 1.a even 1 1 trivial
1568.2.a.v 2 4.b odd 2 1
1568.2.i.m 4 7.d odd 6 2
1568.2.i.n 4 28.g odd 6 2
1568.2.i.v 4 28.f even 6 2
1568.2.i.w 4 7.c even 3 2
1792.2.b.k 4 112.j even 4 2
1792.2.b.m 4 112.l odd 4 2
2016.2.a.o 2 21.c even 2 1
2016.2.a.r 2 84.h odd 2 1
3136.2.a.bf 2 8.d odd 2 1
3136.2.a.by 2 8.b even 2 1
4032.2.a.bv 2 168.i even 2 1
4032.2.a.bw 2 168.e odd 2 1
5600.2.a.z 2 35.c odd 2 1
5600.2.a.bk 2 140.c even 2 1

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(\Gamma_0(1568))$$:

 $$T_{3}^{2} + 2T_{3} - 4$$ T3^2 + 2*T3 - 4 $$T_{5}^{2} + 2T_{5} - 4$$ T5^2 + 2*T5 - 4 $$T_{11}^{2} - 4T_{11} - 16$$ T11^2 - 4*T11 - 16

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{2}$$
$3$ $$T^{2} + 2T - 4$$
$5$ $$T^{2} + 2T - 4$$
$7$ $$T^{2}$$
$11$ $$T^{2} - 4T - 16$$
$13$ $$T^{2} + 6T + 4$$
$17$ $$T^{2} - 20$$
$19$ $$T^{2} - 2T - 4$$
$23$ $$(T + 4)^{2}$$
$29$ $$T^{2} - 20$$
$31$ $$T^{2} - 4T - 16$$
$37$ $$T^{2} - 20$$
$41$ $$T^{2} - 8T - 4$$
$43$ $$T^{2} + 4T - 16$$
$47$ $$T^{2} - 12T + 16$$
$53$ $$(T + 10)^{2}$$
$59$ $$T^{2} + 14T + 44$$
$61$ $$T^{2} + 18T + 76$$
$67$ $$(T + 4)^{2}$$
$71$ $$T^{2} + 8T - 64$$
$73$ $$T^{2} + 12T - 44$$
$79$ $$T^{2} + 8T - 64$$
$83$ $$T^{2} + 14T + 44$$
$89$ $$(T - 6)^{2}$$
$97$ $$T^{2} + 16T + 44$$