LMFDB - Newform orbit 1620.1.v.b

Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [1620,1,Mod(217,1620)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(1620, base_ring=CyclotomicField(12))

chi = DirichletCharacter(H, H._module([0, 8, 3]))

N = Newforms(chi, 1, names="a")

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

chi := DirichletCharacter("1620.217");

S:= CuspForms(chi, 1);

N := Newforms(S);

Level:	$ N $	$=$	$ 1620 = 2^{2} \cdot 3^{4} \cdot 5 $
Weight:	$ k $	$=$	$ 1 $
Character orbit:	$[\chi]$	$=$	1620.v (of order $12$, degree $4$, 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:	$0.808485320465$
Analytic rank:	$0$
Dimension:	$4$
Coefficient field:	$\Q(\zeta_{12})$
comment: defining polynomial gp: f.mod \\ as an extension of the character field
Defining polynomial:	$ x^{4} - x^{2} + 1 $ x^4 - x^2 + 1
Coefficient ring:	$\Z[a_1, \ldots, a_{5}]$
Coefficient ring index:	$ 1 $
Twist minimal:	yes
Projective image:	$S_{4}$
Projective field:	Galois closure of 4.0.40500.1

$q$-expansion

comment: q-expansion

sage: f.q_expansion() # note that sage often uses an isomorphic number field

gp: mfcoefs(f, 20)

The $q$-expansion and trace form are shown below.

$f(q)$	$=$	$ q - \zeta_{12}^{5} q^{5} + ( - \zeta_{12}^{4} - \zeta_{12}) q^{7} +O(q^{10}) $ q - z^5 * q^5 + (-z^4 - z) * q^7	$ q - \zeta_{12}^{5} q^{5} + ( - \zeta_{12}^{4} - \zeta_{12}) q^{7} - \zeta_{12}^{4} q^{11} + (\zeta_{12}^{3} - 1) q^{17} - \zeta_{12}^{3} q^{19} + (\zeta_{12}^{5} + \zeta_{12}^{2}) q^{23} - \zeta_{12}^{4} q^{25} - \zeta_{12} q^{29} - \zeta_{12}^{2} q^{31} + ( - \zeta_{12}^{3} - 1) q^{35} + \zeta_{12}^{2} q^{41} + \zeta_{12}^{5} q^{49} + (\zeta_{12}^{3} + 1) q^{53} - \zeta_{12}^{3} q^{55} - \zeta_{12}^{5} q^{59} + ( - \zeta_{12}^{5} + \zeta_{12}^{2}) q^{67} + q^{71} + (\zeta_{12}^{3} + 1) q^{73} + (\zeta_{12}^{5} - \zeta_{12}^{2}) q^{77} + (\zeta_{12}^{5} + \zeta_{12}^{2}) q^{85} - \zeta_{12}^{3} q^{89} - \zeta_{12}^{2} q^{95} +O(q^{100}) $ q - z^5 * q^5 + (-z^4 - z) * q^7 - z^4 * q^11 + (z^3 - 1) * q^17 - z^3 * q^19 + (z^5 + z^2) * q^23 - z^4 * q^25 - z * q^29 - z^2 * q^31 + (-z^3 - 1) * q^35 + z^2 * q^41 + z^5 * q^49 + (z^3 + 1) * q^53 - z^3 * q^55 - z^5 * q^59 + (-z^5 + z^2) * q^67 + q^71 + (z^3 + 1) * q^73 + (z^5 - z^2) * q^77 + (z^5 + z^2) * q^85 - z^3 * q^89 - z^2 * q^95
$\operatorname{Tr}(f)(q)$	$=$	$ 4 q + 2 q^{7}+O(q^{10}) $ 4 * q + 2 * q^7	$ 4 q + 2 q^{7} + 2 q^{11} - 4 q^{17} + 2 q^{23} + 2 q^{25} - 2 q^{31} - 4 q^{35} + 2 q^{41} + 4 q^{53} + 2 q^{67} + 4 q^{71} + 4 q^{73} - 2 q^{77} + 2 q^{85} - 2 q^{95}+O(q^{100}) $ 4 * q + 2 * q^7 + 2 * q^11 - 4 * q^17 + 2 * q^23 + 2 * q^25 - 2 * q^31 - 4 * q^35 + 2 * q^41 + 4 * q^53 + 2 * q^67 + 4 * q^71 + 4 * q^73 - 2 * q^77 + 2 * q^85 - 2 * q^95

Display 100 coefficients 10 coefficients

Character values

We give the values of $\chi$ on generators for $\left(\mathbb{Z}/1620\mathbb{Z}\right)^\times$.

$n$	$811$	$1297$	$1541$
$\chi(n)$	$1$	$-\zeta_{12}^{3}$	$-\zeta_{12}^{2}$

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} $

217.1

−0.866025	−	0.500000i
−0.866025	+	0.500000i
0.866025	−	0.500000i
0.866025	+	0.500000i

−0.866025

0.500000i

1.36603

−

0.366025i

433.1

−0.866025

−

0.500000i

1.36603

0.366025i

757.1

0.866025

0.500000i

−0.366025

1.36603i

1513.1

0.866025

−

0.500000i

−0.366025

−

1.36603i

Inner twists

Char	Parity	Ord	Mult	Type
1.a	even	1	1	trivial
5.c	odd	4	1	inner
9.c	even	3	1	inner
45.k	odd	12	1	inner

Twists

By twisting character orbit
Char	Parity	Ord	Mult	Type	Twist	Min	Dim
1.a	even	1	1	trivial	1620.1.v.b		4
3.b	odd	2	1		1620.1.v.a		4
5.c	odd	4	1	inner	1620.1.v.b		4
9.c	even	3	1		1620.1.l.a	✓	2
9.c	even	3	1	inner	1620.1.v.b		4
9.d	odd	6	1		1620.1.l.b	yes	2
9.d	odd	6	1		1620.1.v.a		4
15.e	even	4	1		1620.1.v.a		4
45.k	odd	12	1		1620.1.l.a	✓	2
45.k	odd	12	1	inner	1620.1.v.b		4
45.l	even	12	1		1620.1.l.b	yes	2
45.l	even	12	1		1620.1.v.a		4

By twisted newform orbit
Twist	Min	Dim	Char	Parity	Ord	Mult	Type
1620.1.l.a	✓	2	9.c	even	3	1
1620.1.l.a	✓	2	45.k	odd	12	1
1620.1.l.b	yes	2	9.d	odd	6	1
1620.1.l.b	yes	2	45.l	even	12	1
1620.1.v.a		4	3.b	odd	2	1
1620.1.v.a		4	9.d	odd	6	1
1620.1.v.a		4	15.e	even	4	1
1620.1.v.a		4	45.l	even	12	1
1620.1.v.b		4	1.a	even	1	1	trivial
1620.1.v.b		4	5.c	odd	4	1	inner
1620.1.v.b		4	9.c	even	3	1	inner
1620.1.v.b		4	45.k	odd	12	1	inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator $ T_{11}^{2} - T_{11} + 1 $ T11^2 - T11 + 1 acting on $S_{1}^{\mathrm{new}}(1620, [\chi])$.

Hecke characteristic polynomials

$p$	$F_p(T)$
$2$	$ T^{4} $ T^4
$3$	$ T^{4} $ T^4
$5$	$ T^{4} - T^{2} + 1 $ T^4 - T^2 + 1
$7$	$ T^{4} - 2 T^{3} + \cdots + 4 $ T^4 - 2T^3 + 2T^2 - 4*T + 4
$11$	$ (T^{2} - T + 1)^{2} $ (T^2 - T + 1)^2
$13$	$ T^{4} $ T^4
$17$	$ (T^{2} + 2 T + 2)^{2} $ (T^2 + 2*T + 2)^2
$19$	$ (T^{2} + 1)^{2} $ (T^2 + 1)^2
$23$	$ T^{4} - 2 T^{3} + \cdots + 4 $ T^4 - 2T^3 + 2T^2 - 4*T + 4
$29$	$ T^{4} - T^{2} + 1 $ T^4 - T^2 + 1
$31$	$ (T^{2} + T + 1)^{2} $ (T^2 + T + 1)^2
$37$	$ T^{4} $ T^4
$41$	$ (T^{2} - T + 1)^{2} $ (T^2 - T + 1)^2
$43$	$ T^{4} $ T^4
$47$	$ T^{4} $ T^4
$53$	$ (T^{2} - 2 T + 2)^{2} $ (T^2 - 2*T + 2)^2
$59$	$ T^{4} - T^{2} + 1 $ T^4 - T^2 + 1
$61$	$ T^{4} $ T^4
$67$	$ T^{4} - 2 T^{3} + \cdots + 4 $ T^4 - 2T^3 + 2T^2 - 4*T + 4
$71$	$ (T - 1)^{4} $ (T - 1)^4
$73$	$ (T^{2} - 2 T + 2)^{2} $ (T^2 - 2*T + 2)^2
$79$	$ T^{4} $ T^4
$83$	$ T^{4} $ T^4
$89$	$ (T^{2} + 1)^{2} $ (T^2 + 1)^2
$97$	$ T^{4} $ T^4
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Elliptic curves over $\Q$
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Higher genus families
Abelian varieties over $\F_{q}$

Level:	\( N \)	\(=\)	\( 1620 = 2^{2} \cdot 3^{4} \cdot 5 \)
Weight:	\( k \)	\(=\)	\( 1 \)
Character orbit:	\([\chi]\)	\(=\)	1620.v (of order \(12\), degree \(4\), not minimal)

\(f(q)\)	\(=\)	\( q - \zeta_{12}^{5} q^{5} + ( - \zeta_{12}^{4} - \zeta_{12}) q^{7} +O(q^{10}) \) q - z^5 * q^5 + (-z^4 - z) * q^7	\( q - \zeta_{12}^{5} q^{5} + ( - \zeta_{12}^{4} - \zeta_{12}) q^{7} - \zeta_{12}^{4} q^{11} + (\zeta_{12}^{3} - 1) q^{17} - \zeta_{12}^{3} q^{19} + (\zeta_{12}^{5} + \zeta_{12}^{2}) q^{23} - \zeta_{12}^{4} q^{25} - \zeta_{12} q^{29} - \zeta_{12}^{2} q^{31} + ( - \zeta_{12}^{3} - 1) q^{35} + \zeta_{12}^{2} q^{41} + \zeta_{12}^{5} q^{49} + (\zeta_{12}^{3} + 1) q^{53} - \zeta_{12}^{3} q^{55} - \zeta_{12}^{5} q^{59} + ( - \zeta_{12}^{5} + \zeta_{12}^{2}) q^{67} + q^{71} + (\zeta_{12}^{3} + 1) q^{73} + (\zeta_{12}^{5} - \zeta_{12}^{2}) q^{77} + (\zeta_{12}^{5} + \zeta_{12}^{2}) q^{85} - \zeta_{12}^{3} q^{89} - \zeta_{12}^{2} q^{95} +O(q^{100}) \) q - z^5 * q^5 + (-z^4 - z) * q^7 - z^4 * q^11 + (z^3 - 1) * q^17 - z^3 * q^19 + (z^5 + z^2) * q^23 - z^4 * q^25 - z * q^29 - z^2 * q^31 + (-z^3 - 1) * q^35 + z^2 * q^41 + z^5 * q^49 + (z^3 + 1) * q^53 - z^3 * q^55 - z^5 * q^59 + (-z^5 + z^2) * q^67 + q^71 + (z^3 + 1) * q^73 + (z^5 - z^2) * q^77 + (z^5 + z^2) * q^85 - z^3 * q^89 - z^2 * q^95
\(\operatorname{Tr}(f)(q)\)	\(=\)	\( 4 q + 2 q^{7}+O(q^{10}) \) 4 * q + 2 * q^7	\( 4 q + 2 q^{7} + 2 q^{11} - 4 q^{17} + 2 q^{23} + 2 q^{25} - 2 q^{31} - 4 q^{35} + 2 q^{41} + 4 q^{53} + 2 q^{67} + 4 q^{71} + 4 q^{73} - 2 q^{77} + 2 q^{85} - 2 q^{95}+O(q^{100}) \) 4 * q + 2 * q^7 + 2 * q^11 - 4 * q^17 + 2 * q^23 + 2 * q^25 - 2 * q^31 - 4 * q^35 + 2 * q^41 + 4 * q^53 + 2 * q^67 + 4 * q^71 + 4 * q^73 - 2 * q^77 + 2 * q^85 - 2 * q^95

Introduction

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Modular forms

Varieties

Fields

Representations

Groups

Database

Properties

Related objects

Downloads

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Newspace parameters

Newform invariants

$q$-expansion

Character values

Embeddings

Inner twists

Twists

Hecke kernels

Hecke characteristic polynomials

This project is supported by grants from the US National Science Foundation, the UK Engineering and Physical Sciences Research Council, and the Simons Foundation.

Label	1620.1.v.b

Level	$1620$
Weight	$1$
Character orbit	1620.v
Analytic conductor	$0.808$
Analytic rank	$0$
Dimension	$4$
Projective image	$S_{4}$
CM/RM	no
Inner twists	$4$

Self dual:	no
Analytic conductor:	\(0.808485320465\)
Analytic rank:	\(0\)
Dimension:	\(4\)
Coefficient field:	\(\Q(\zeta_{12})\)
comment: defining polynomial gp: f.mod \\ as an extension of the character field
Defining polynomial:	\( x^{4} - x^{2} + 1 \) x^4 - x^2 + 1
Coefficient ring:	\(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index:	\( 1 \)
Twist minimal:	yes
Projective image:	\(S_{4}\)
Projective field:	Galois closure of 4.0.40500.1

\(n\)	\(811\)	\(1297\)	\(1541\)
\(\chi(n)\)	\(1\)	\(-\zeta_{12}^{3}\)	\(-\zeta_{12}^{2}\)

$p$	$F_p(T)$
$2$	\( T^{4} \) T^4
$3$	\( T^{4} \) T^4
$5$	\( T^{4} - T^{2} + 1 \) T^4 - T^2 + 1
$7$	\( T^{4} - 2 T^{3} + \cdots + 4 \) T^4 - 2T^3 + 2T^2 - 4*T + 4
$11$	\( (T^{2} - T + 1)^{2} \) (T^2 - T + 1)^2
$13$	\( T^{4} \) T^4
$17$	\( (T^{2} + 2 T + 2)^{2} \) (T^2 + 2*T + 2)^2
$19$	\( (T^{2} + 1)^{2} \) (T^2 + 1)^2
$23$	\( T^{4} - 2 T^{3} + \cdots + 4 \) T^4 - 2T^3 + 2T^2 - 4*T + 4
$29$	\( T^{4} - T^{2} + 1 \) T^4 - T^2 + 1
$31$	\( (T^{2} + T + 1)^{2} \) (T^2 + T + 1)^2
$37$	\( T^{4} \) T^4
$41$	\( (T^{2} - T + 1)^{2} \) (T^2 - T + 1)^2
$43$	\( T^{4} \) T^4
$47$	\( T^{4} \) T^4
$53$	\( (T^{2} - 2 T + 2)^{2} \) (T^2 - 2*T + 2)^2
$59$	\( T^{4} - T^{2} + 1 \) T^4 - T^2 + 1
$61$	\( T^{4} \) T^4
$67$	\( T^{4} - 2 T^{3} + \cdots + 4 \) T^4 - 2T^3 + 2T^2 - 4*T + 4
$71$	\( (T - 1)^{4} \) (T - 1)^4
$73$	\( (T^{2} - 2 T + 2)^{2} \) (T^2 - 2*T + 2)^2
$79$	\( T^{4} \) T^4
$83$	\( T^{4} \) T^4
$89$	\( (T^{2} + 1)^{2} \) (T^2 + 1)^2
$97$	\( T^{4} \) T^4
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\(n\):		e.g. 2-40 or 990-1000
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