# Properties

 Label 145.2.c.a Level $145$ Weight $2$ Character orbit 145.c Analytic conductor $1.158$ Analytic rank $0$ Dimension $4$ Inner twists $2$

# Related objects

Show commands: Magma / PariGP / SageMath

## Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [145,2,Mod(86,145)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(145, base_ring=CyclotomicField(2))

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

N = Newforms(chi, 2, names="a")

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

chi := DirichletCharacter("145.86");

S:= CuspForms(chi, 2);

N := Newforms(S);

 Level: $$N$$ $$=$$ $$145 = 5 \cdot 29$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 145.c (of order $$2$$, degree $$1$$, 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: $$1.15783082931$$ Analytic rank: $$0$$ Dimension: $$4$$ Coefficient field: $$\Q(\sqrt{-2}, \sqrt{3})$$ comment: defining polynomial  gp: f.mod \\ as an extension of the character field Defining polynomial: $$x^{4} + 4x^{2} + 1$$ x^4 + 4*x^2 + 1 Coefficient ring: $$\Z[a_1, a_2]$$ Coefficient ring index: $$1$$ Twist minimal: yes 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 a basis $$1,\beta_1,\beta_2,\beta_3$$ for the coefficient ring described below. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q + \beta_1 q^{2} + ( - \beta_{3} + \beta_1) q^{3} + \beta_{2} q^{4} - q^{5} + (\beta_{2} - 1) q^{6} + (\beta_{2} - 1) q^{7} + \beta_{3} q^{8} + q^{9}+O(q^{10})$$ q + b1 * q^2 + (-b3 + b1) * q^3 + b2 * q^4 - q^5 + (b2 - 1) * q^6 + (b2 - 1) * q^7 + b3 * q^8 + q^9 $$q + \beta_1 q^{2} + ( - \beta_{3} + \beta_1) q^{3} + \beta_{2} q^{4} - q^{5} + (\beta_{2} - 1) q^{6} + (\beta_{2} - 1) q^{7} + \beta_{3} q^{8} + q^{9} - \beta_1 q^{10} + ( - 3 \beta_{3} + \beta_1) q^{11} + ( - \beta_{3} - \beta_1) q^{12} + ( - 2 \beta_{2} + 2) q^{13} + (\beta_{3} - 3 \beta_1) q^{14} + (\beta_{3} - \beta_1) q^{15} + (2 \beta_{2} - 1) q^{16} + (3 \beta_{3} + \beta_1) q^{17} + \beta_1 q^{18} + (3 \beta_{3} - 3 \beta_1) q^{19} - \beta_{2} q^{20} - 2 \beta_1 q^{21} + (\beta_{2} + 1) q^{22} + ( - 3 \beta_{2} - 3) q^{23} + (\beta_{2} + 1) q^{24} + q^{25} + ( - 2 \beta_{3} + 6 \beta_1) q^{26} + ( - 4 \beta_{3} + 4 \beta_1) q^{27} + ( - \beta_{2} + 3) q^{28} + ( - \beta_{3} - 3 \beta_{2} + \beta_1) q^{29} + ( - \beta_{2} + 1) q^{30} + (3 \beta_{3} - 3 \beta_1) q^{31} + (4 \beta_{3} - 5 \beta_1) q^{32} + ( - 2 \beta_{2} - 4) q^{33} + (\beta_{2} - 5) q^{34} + ( - \beta_{2} + 1) q^{35} + \beta_{2} q^{36} + ( - 3 \beta_{3} + 3 \beta_1) q^{37} + ( - 3 \beta_{2} + 3) q^{38} + 4 \beta_1 q^{39} - \beta_{3} q^{40} + (4 \beta_{3} + 2 \beta_1) q^{41} + ( - 2 \beta_{2} + 4) q^{42} + (3 \beta_{3} - 3 \beta_1) q^{43} + ( - 5 \beta_{3} + \beta_1) q^{44} - q^{45} + ( - 3 \beta_{3} + 3 \beta_1) q^{46} + ( - 3 \beta_{3} - 5 \beta_1) q^{47} + ( - \beta_{3} - 3 \beta_1) q^{48} + ( - 2 \beta_{2} - 3) q^{49} + \beta_1 q^{50} + (4 \beta_{2} + 2) q^{51} + (2 \beta_{2} - 6) q^{52} + (4 \beta_{2} - 4) q^{54} + (3 \beta_{3} - \beta_1) q^{55} + (\beta_{3} - \beta_1) q^{56} + 6 q^{57} + ( - 3 \beta_{3} + \beta_{2} + 6 \beta_1 - 1) q^{58} + 6 q^{59} + (\beta_{3} + \beta_1) q^{60} - 6 \beta_1 q^{61} + ( - 3 \beta_{2} + 3) q^{62} + (\beta_{2} - 1) q^{63} + ( - \beta_{2} + 4) q^{64} + (2 \beta_{2} - 2) q^{65} - 2 \beta_{3} q^{66} + (7 \beta_{2} - 1) q^{67} + (7 \beta_{3} - 5 \beta_1) q^{68} + 6 \beta_{3} q^{69} + ( - \beta_{3} + 3 \beta_1) q^{70} + 6 q^{71} + \beta_{3} q^{72} + (3 \beta_{3} - 9 \beta_1) q^{73} + (3 \beta_{2} - 3) q^{74} + ( - \beta_{3} + \beta_1) q^{75} + (3 \beta_{3} + 3 \beta_1) q^{76} - 2 \beta_{3} q^{77} + (4 \beta_{2} - 8) q^{78} + ( - 9 \beta_{3} + 3 \beta_1) q^{79} + ( - 2 \beta_{2} + 1) q^{80} - 5 q^{81} + (2 \beta_{2} - 8) q^{82} + (3 \beta_{2} - 3) q^{83} + ( - 2 \beta_{3} + 4 \beta_1) q^{84} + ( - 3 \beta_{3} - \beta_1) q^{85} + ( - 3 \beta_{2} + 3) q^{86} + (3 \beta_{3} + 3 \beta_1 - 2) q^{87} + (3 \beta_{2} + 5) q^{88} + 4 \beta_1 q^{89} - \beta_1 q^{90} + (4 \beta_{2} - 8) q^{91} + ( - 3 \beta_{2} - 9) q^{92} + 6 q^{93} + ( - 5 \beta_{2} + 13) q^{94} + ( - 3 \beta_{3} + 3 \beta_1) q^{95} + ( - \beta_{2} + 9) q^{96} + (3 \beta_{3} + 3 \beta_1) q^{97} + ( - 2 \beta_{3} + \beta_1) q^{98} + ( - 3 \beta_{3} + \beta_1) q^{99}+O(q^{100})$$ q + b1 * q^2 + (-b3 + b1) * q^3 + b2 * q^4 - q^5 + (b2 - 1) * q^6 + (b2 - 1) * q^7 + b3 * q^8 + q^9 - b1 * q^10 + (-3*b3 + b1) * q^11 + (-b3 - b1) * q^12 + (-2*b2 + 2) * q^13 + (b3 - 3*b1) * q^14 + (b3 - b1) * q^15 + (2*b2 - 1) * q^16 + (3*b3 + b1) * q^17 + b1 * q^18 + (3*b3 - 3*b1) * q^19 - b2 * q^20 - 2*b1 * q^21 + (b2 + 1) * q^22 + (-3*b2 - 3) * q^23 + (b2 + 1) * q^24 + q^25 + (-2*b3 + 6*b1) * q^26 + (-4*b3 + 4*b1) * q^27 + (-b2 + 3) * q^28 + (-b3 - 3*b2 + b1) * q^29 + (-b2 + 1) * q^30 + (3*b3 - 3*b1) * q^31 + (4*b3 - 5*b1) * q^32 + (-2*b2 - 4) * q^33 + (b2 - 5) * q^34 + (-b2 + 1) * q^35 + b2 * q^36 + (-3*b3 + 3*b1) * q^37 + (-3*b2 + 3) * q^38 + 4*b1 * q^39 - b3 * q^40 + (4*b3 + 2*b1) * q^41 + (-2*b2 + 4) * q^42 + (3*b3 - 3*b1) * q^43 + (-5*b3 + b1) * q^44 - q^45 + (-3*b3 + 3*b1) * q^46 + (-3*b3 - 5*b1) * q^47 + (-b3 - 3*b1) * q^48 + (-2*b2 - 3) * q^49 + b1 * q^50 + (4*b2 + 2) * q^51 + (2*b2 - 6) * q^52 + (4*b2 - 4) * q^54 + (3*b3 - b1) * q^55 + (b3 - b1) * q^56 + 6 * q^57 + (-3*b3 + b2 + 6*b1 - 1) * q^58 + 6 * q^59 + (b3 + b1) * q^60 - 6*b1 * q^61 + (-3*b2 + 3) * q^62 + (b2 - 1) * q^63 + (-b2 + 4) * q^64 + (2*b2 - 2) * q^65 - 2*b3 * q^66 + (7*b2 - 1) * q^67 + (7*b3 - 5*b1) * q^68 + 6*b3 * q^69 + (-b3 + 3*b1) * q^70 + 6 * q^71 + b3 * q^72 + (3*b3 - 9*b1) * q^73 + (3*b2 - 3) * q^74 + (-b3 + b1) * q^75 + (3*b3 + 3*b1) * q^76 - 2*b3 * q^77 + (4*b2 - 8) * q^78 + (-9*b3 + 3*b1) * q^79 + (-2*b2 + 1) * q^80 - 5 * q^81 + (2*b2 - 8) * q^82 + (3*b2 - 3) * q^83 + (-2*b3 + 4*b1) * q^84 + (-3*b3 - b1) * q^85 + (-3*b2 + 3) * q^86 + (3*b3 + 3*b1 - 2) * q^87 + (3*b2 + 5) * q^88 + 4*b1 * q^89 - b1 * q^90 + (4*b2 - 8) * q^91 + (-3*b2 - 9) * q^92 + 6 * q^93 + (-5*b2 + 13) * q^94 + (-3*b3 + 3*b1) * q^95 + (-b2 + 9) * q^96 + (3*b3 + 3*b1) * q^97 + (-2*b3 + b1) * q^98 + (-3*b3 + b1) * q^99 $$\operatorname{Tr}(f)(q)$$ $$=$$ $$4 q - 4 q^{5} - 4 q^{6} - 4 q^{7} + 4 q^{9}+O(q^{10})$$ 4 * q - 4 * q^5 - 4 * q^6 - 4 * q^7 + 4 * q^9 $$4 q - 4 q^{5} - 4 q^{6} - 4 q^{7} + 4 q^{9} + 8 q^{13} - 4 q^{16} + 4 q^{22} - 12 q^{23} + 4 q^{24} + 4 q^{25} + 12 q^{28} + 4 q^{30} - 16 q^{33} - 20 q^{34} + 4 q^{35} + 12 q^{38} + 16 q^{42} - 4 q^{45} - 12 q^{49} + 8 q^{51} - 24 q^{52} - 16 q^{54} + 24 q^{57} - 4 q^{58} + 24 q^{59} + 12 q^{62} - 4 q^{63} + 16 q^{64} - 8 q^{65} - 4 q^{67} + 24 q^{71} - 12 q^{74} - 32 q^{78} + 4 q^{80} - 20 q^{81} - 32 q^{82} - 12 q^{83} + 12 q^{86} - 8 q^{87} + 20 q^{88} - 32 q^{91} - 36 q^{92} + 24 q^{93} + 52 q^{94} + 36 q^{96}+O(q^{100})$$ 4 * q - 4 * q^5 - 4 * q^6 - 4 * q^7 + 4 * q^9 + 8 * q^13 - 4 * q^16 + 4 * q^22 - 12 * q^23 + 4 * q^24 + 4 * q^25 + 12 * q^28 + 4 * q^30 - 16 * q^33 - 20 * q^34 + 4 * q^35 + 12 * q^38 + 16 * q^42 - 4 * q^45 - 12 * q^49 + 8 * q^51 - 24 * q^52 - 16 * q^54 + 24 * q^57 - 4 * q^58 + 24 * q^59 + 12 * q^62 - 4 * q^63 + 16 * q^64 - 8 * q^65 - 4 * q^67 + 24 * q^71 - 12 * q^74 - 32 * q^78 + 4 * q^80 - 20 * q^81 - 32 * q^82 - 12 * q^83 + 12 * q^86 - 8 * q^87 + 20 * q^88 - 32 * q^91 - 36 * q^92 + 24 * q^93 + 52 * q^94 + 36 * q^96

Basis of coefficient ring in terms of a root $$\nu$$ of $$x^{4} + 4x^{2} + 1$$ :

 $$\beta_{1}$$ $$=$$ $$\nu$$ v $$\beta_{2}$$ $$=$$ $$\nu^{2} + 2$$ v^2 + 2 $$\beta_{3}$$ $$=$$ $$\nu^{3} + 4\nu$$ v^3 + 4*v
 $$\nu$$ $$=$$ $$\beta_1$$ b1 $$\nu^{2}$$ $$=$$ $$\beta_{2} - 2$$ b2 - 2 $$\nu^{3}$$ $$=$$ $$\beta_{3} - 4\beta_1$$ b3 - 4*b1

## Character values

We give the values of $$\chi$$ on generators for $$\left(\mathbb{Z}/145\mathbb{Z}\right)^\times$$.

 $$n$$ $$31$$ $$117$$ $$\chi(n)$$ $$-1$$ $$1$$

## 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   $$\iota_m(\nu)$$ $$a_{2}$$ $$a_{3}$$ $$a_{4}$$ $$a_{5}$$ $$a_{6}$$ $$a_{7}$$ $$a_{8}$$ $$a_{9}$$ $$a_{10}$$
86.1
 − 1.93185i − 0.517638i 0.517638i 1.93185i
1.93185i 1.41421i −1.73205 −1.00000 −2.73205 −2.73205 0.517638i 1.00000 1.93185i
86.2 0.517638i 1.41421i 1.73205 −1.00000 0.732051 0.732051 1.93185i 1.00000 0.517638i
86.3 0.517638i 1.41421i 1.73205 −1.00000 0.732051 0.732051 1.93185i 1.00000 0.517638i
86.4 1.93185i 1.41421i −1.73205 −1.00000 −2.73205 −2.73205 0.517638i 1.00000 1.93185i
 $$n$$: 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
29.b even 2 1 inner

## Twists

By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 145.2.c.a 4
3.b odd 2 1 1305.2.d.a 4
4.b odd 2 1 2320.2.g.e 4
5.b even 2 1 725.2.c.d 4
5.c odd 4 2 725.2.d.b 8
29.b even 2 1 inner 145.2.c.a 4
29.c odd 4 2 4205.2.a.g 4
87.d odd 2 1 1305.2.d.a 4
116.d odd 2 1 2320.2.g.e 4
145.d even 2 1 725.2.c.d 4
145.h odd 4 2 725.2.d.b 8

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
145.2.c.a 4 1.a even 1 1 trivial
145.2.c.a 4 29.b even 2 1 inner
725.2.c.d 4 5.b even 2 1
725.2.c.d 4 145.d even 2 1
725.2.d.b 8 5.c odd 4 2
725.2.d.b 8 145.h odd 4 2
1305.2.d.a 4 3.b odd 2 1
1305.2.d.a 4 87.d odd 2 1
2320.2.g.e 4 4.b odd 2 1
2320.2.g.e 4 116.d odd 2 1
4205.2.a.g 4 29.c odd 4 2

## Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator $$T_{2}^{4} + 4T_{2}^{2} + 1$$ acting on $$S_{2}^{\mathrm{new}}(145, [\chi])$$.

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{4} + 4T^{2} + 1$$
$3$ $$(T^{2} + 2)^{2}$$
$5$ $$(T + 1)^{4}$$
$7$ $$(T^{2} + 2 T - 2)^{2}$$
$11$ $$T^{4} + 28T^{2} + 4$$
$13$ $$(T^{2} - 4 T - 8)^{2}$$
$17$ $$T^{4} + 52T^{2} + 484$$
$19$ $$(T^{2} + 18)^{2}$$
$23$ $$(T^{2} + 6 T - 18)^{2}$$
$29$ $$T^{4} - 50T^{2} + 841$$
$31$ $$(T^{2} + 18)^{2}$$
$37$ $$(T^{2} + 18)^{2}$$
$41$ $$T^{4} + 112T^{2} + 2704$$
$43$ $$(T^{2} + 18)^{2}$$
$47$ $$T^{4} + 196T^{2} + 8836$$
$53$ $$T^{4}$$
$59$ $$(T - 6)^{4}$$
$61$ $$T^{4} + 144T^{2} + 1296$$
$67$ $$(T^{2} + 2 T - 146)^{2}$$
$71$ $$(T - 6)^{4}$$
$73$ $$T^{4} + 252T^{2} + 324$$
$79$ $$T^{4} + 252T^{2} + 324$$
$83$ $$(T^{2} + 6 T - 18)^{2}$$
$89$ $$T^{4} + 64T^{2} + 256$$
$97$ $$(T^{2} + 54)^{2}$$