# Properties

 Label 675.2.a.k Level $675$ Weight $2$ Character orbit 675.a Self dual yes Analytic conductor $5.390$ 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] = [675,2,Mod(1,675)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(675, base_ring=CyclotomicField(2))

chi = DirichletCharacter(H, H._module([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("675.1");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$675 = 3^{3} \cdot 5^{2}$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 675.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: $$5.38990213644$$ Analytic rank: $$1$$ Dimension: $$2$$ Coefficient field: $$\Q(\sqrt{13})$$ comment: defining polynomial  gp: f.mod \\ as an extension of the character field Defining polynomial: $$x^{2} - x - 3$$ x^2 - x - 3 Coefficient ring: $$\Z[a_1, a_2]$$ Coefficient ring index: $$1$$ Twist minimal: no (minimal twist has level 135) 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 $$\beta = \frac{1}{2}(1 + \sqrt{13})$$. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q - \beta q^{2} + (\beta + 1) q^{4} + (2 \beta - 2) q^{7} - 3 q^{8} +O(q^{10})$$ q - b * q^2 + (b + 1) * q^4 + (2*b - 2) * q^7 - 3 * q^8 $$q - \beta q^{2} + (\beta + 1) q^{4} + (2 \beta - 2) q^{7} - 3 q^{8} - 2 \beta q^{11} + ( - 2 \beta - 2) q^{13} - 6 q^{14} + (\beta - 2) q^{16} + (2 \beta - 3) q^{17} + (2 \beta - 1) q^{19} + (2 \beta + 6) q^{22} - 3 q^{23} + (4 \beta + 6) q^{26} + (2 \beta + 4) q^{28} + (2 \beta - 6) q^{29} + ( - 2 \beta - 1) q^{31} + (\beta + 3) q^{32} + (\beta - 6) q^{34} - 2 q^{37} + ( - \beta - 6) q^{38} + 2 \beta q^{41} + ( - 2 \beta + 4) q^{43} + ( - 4 \beta - 6) q^{44} + 3 \beta q^{46} - 4 \beta q^{47} + ( - 4 \beta + 9) q^{49} + ( - 6 \beta - 8) q^{52} + (2 \beta - 3) q^{53} + ( - 6 \beta + 6) q^{56} + (4 \beta - 6) q^{58} + ( - 2 \beta + 6) q^{59} + ( - 4 \beta + 5) q^{61} + (3 \beta + 6) q^{62} + ( - 6 \beta + 1) q^{64} + ( - 4 \beta + 10) q^{67} + (\beta + 3) q^{68} + (2 \beta - 12) q^{71} + ( - 2 \beta - 8) q^{73} + 2 \beta q^{74} + (3 \beta + 5) q^{76} - 12 q^{77} + ( - 2 \beta - 7) q^{79} + ( - 2 \beta - 6) q^{82} + 3 q^{83} + ( - 2 \beta + 6) q^{86} + 6 \beta q^{88} + 6 \beta q^{89} + ( - 4 \beta - 8) q^{91} + ( - 3 \beta - 3) q^{92} + (4 \beta + 12) q^{94} - 8 q^{97} + ( - 5 \beta + 12) q^{98} +O(q^{100})$$ q - b * q^2 + (b + 1) * q^4 + (2*b - 2) * q^7 - 3 * q^8 - 2*b * q^11 + (-2*b - 2) * q^13 - 6 * q^14 + (b - 2) * q^16 + (2*b - 3) * q^17 + (2*b - 1) * q^19 + (2*b + 6) * q^22 - 3 * q^23 + (4*b + 6) * q^26 + (2*b + 4) * q^28 + (2*b - 6) * q^29 + (-2*b - 1) * q^31 + (b + 3) * q^32 + (b - 6) * q^34 - 2 * q^37 + (-b - 6) * q^38 + 2*b * q^41 + (-2*b + 4) * q^43 + (-4*b - 6) * q^44 + 3*b * q^46 - 4*b * q^47 + (-4*b + 9) * q^49 + (-6*b - 8) * q^52 + (2*b - 3) * q^53 + (-6*b + 6) * q^56 + (4*b - 6) * q^58 + (-2*b + 6) * q^59 + (-4*b + 5) * q^61 + (3*b + 6) * q^62 + (-6*b + 1) * q^64 + (-4*b + 10) * q^67 + (b + 3) * q^68 + (2*b - 12) * q^71 + (-2*b - 8) * q^73 + 2*b * q^74 + (3*b + 5) * q^76 - 12 * q^77 + (-2*b - 7) * q^79 + (-2*b - 6) * q^82 + 3 * q^83 + (-2*b + 6) * q^86 + 6*b * q^88 + 6*b * q^89 + (-4*b - 8) * q^91 + (-3*b - 3) * q^92 + (4*b + 12) * q^94 - 8 * q^97 + (-5*b + 12) * q^98 $$\operatorname{Tr}(f)(q)$$ $$=$$ $$2 q - q^{2} + 3 q^{4} - 2 q^{7} - 6 q^{8}+O(q^{10})$$ 2 * q - q^2 + 3 * q^4 - 2 * q^7 - 6 * q^8 $$2 q - q^{2} + 3 q^{4} - 2 q^{7} - 6 q^{8} - 2 q^{11} - 6 q^{13} - 12 q^{14} - 3 q^{16} - 4 q^{17} + 14 q^{22} - 6 q^{23} + 16 q^{26} + 10 q^{28} - 10 q^{29} - 4 q^{31} + 7 q^{32} - 11 q^{34} - 4 q^{37} - 13 q^{38} + 2 q^{41} + 6 q^{43} - 16 q^{44} + 3 q^{46} - 4 q^{47} + 14 q^{49} - 22 q^{52} - 4 q^{53} + 6 q^{56} - 8 q^{58} + 10 q^{59} + 6 q^{61} + 15 q^{62} - 4 q^{64} + 16 q^{67} + 7 q^{68} - 22 q^{71} - 18 q^{73} + 2 q^{74} + 13 q^{76} - 24 q^{77} - 16 q^{79} - 14 q^{82} + 6 q^{83} + 10 q^{86} + 6 q^{88} + 6 q^{89} - 20 q^{91} - 9 q^{92} + 28 q^{94} - 16 q^{97} + 19 q^{98}+O(q^{100})$$ 2 * q - q^2 + 3 * q^4 - 2 * q^7 - 6 * q^8 - 2 * q^11 - 6 * q^13 - 12 * q^14 - 3 * q^16 - 4 * q^17 + 14 * q^22 - 6 * q^23 + 16 * q^26 + 10 * q^28 - 10 * q^29 - 4 * q^31 + 7 * q^32 - 11 * q^34 - 4 * q^37 - 13 * q^38 + 2 * q^41 + 6 * q^43 - 16 * q^44 + 3 * q^46 - 4 * q^47 + 14 * q^49 - 22 * q^52 - 4 * q^53 + 6 * q^56 - 8 * q^58 + 10 * q^59 + 6 * q^61 + 15 * q^62 - 4 * q^64 + 16 * q^67 + 7 * q^68 - 22 * q^71 - 18 * q^73 + 2 * q^74 + 13 * q^76 - 24 * q^77 - 16 * q^79 - 14 * q^82 + 6 * q^83 + 10 * q^86 + 6 * q^88 + 6 * q^89 - 20 * q^91 - 9 * q^92 + 28 * q^94 - 16 * q^97 + 19 * q^98

## 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
 2.30278 −1.30278
−2.30278 0 3.30278 0 0 2.60555 −3.00000 0 0
1.2 1.30278 0 −0.302776 0 0 −4.60555 −3.00000 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
$$3$$ $$1$$
$$5$$ $$1$$

## 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 675.2.a.k 2
3.b odd 2 1 675.2.a.p 2
5.b even 2 1 135.2.a.d yes 2
5.c odd 4 2 675.2.b.h 4
15.d odd 2 1 135.2.a.c 2
15.e even 4 2 675.2.b.i 4
20.d odd 2 1 2160.2.a.y 2
35.c odd 2 1 6615.2.a.v 2
40.e odd 2 1 8640.2.a.cy 2
40.f even 2 1 8640.2.a.df 2
45.h odd 6 2 405.2.e.k 4
45.j even 6 2 405.2.e.j 4
60.h even 2 1 2160.2.a.ba 2
105.g even 2 1 6615.2.a.p 2
120.i odd 2 1 8640.2.a.cr 2
120.m even 2 1 8640.2.a.ck 2

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
135.2.a.c 2 15.d odd 2 1
135.2.a.d yes 2 5.b even 2 1
405.2.e.j 4 45.j even 6 2
405.2.e.k 4 45.h odd 6 2
675.2.a.k 2 1.a even 1 1 trivial
675.2.a.p 2 3.b odd 2 1
675.2.b.h 4 5.c odd 4 2
675.2.b.i 4 15.e even 4 2
2160.2.a.y 2 20.d odd 2 1
2160.2.a.ba 2 60.h even 2 1
6615.2.a.p 2 105.g even 2 1
6615.2.a.v 2 35.c odd 2 1
8640.2.a.ck 2 120.m even 2 1
8640.2.a.cr 2 120.i odd 2 1
8640.2.a.cy 2 40.e odd 2 1
8640.2.a.df 2 40.f even 2 1

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(\Gamma_0(675))$$:

 $$T_{2}^{2} + T_{2} - 3$$ T2^2 + T2 - 3 $$T_{7}^{2} + 2T_{7} - 12$$ T7^2 + 2*T7 - 12 $$T_{11}^{2} + 2T_{11} - 12$$ T11^2 + 2*T11 - 12

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{2} + T - 3$$
$3$ $$T^{2}$$
$5$ $$T^{2}$$
$7$ $$T^{2} + 2T - 12$$
$11$ $$T^{2} + 2T - 12$$
$13$ $$T^{2} + 6T - 4$$
$17$ $$T^{2} + 4T - 9$$
$19$ $$T^{2} - 13$$
$23$ $$(T + 3)^{2}$$
$29$ $$T^{2} + 10T + 12$$
$31$ $$T^{2} + 4T - 9$$
$37$ $$(T + 2)^{2}$$
$41$ $$T^{2} - 2T - 12$$
$43$ $$T^{2} - 6T - 4$$
$47$ $$T^{2} + 4T - 48$$
$53$ $$T^{2} + 4T - 9$$
$59$ $$T^{2} - 10T + 12$$
$61$ $$T^{2} - 6T - 43$$
$67$ $$T^{2} - 16T + 12$$
$71$ $$T^{2} + 22T + 108$$
$73$ $$T^{2} + 18T + 68$$
$79$ $$T^{2} + 16T + 51$$
$83$ $$(T - 3)^{2}$$
$89$ $$T^{2} - 6T - 108$$
$97$ $$(T + 8)^{2}$$