LMFDB - Newform orbit 2100.1.cj.a

Show commands: Magma / Pari/GP / SageMath

Newspace parameters

comment:Compute space of new eigenforms

gp:[N,k,chi] = [2100,1,Mod(257,2100)] mf = mfinit([N,k,chi],0) lf = mfeigenbasis(mf)

sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(2100, base_ring=CyclotomicField(12)) chi = DirichletCharacter(H, H._module([0, 6, 3, 10])) N = Newforms(chi, 1, names="a")

magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code chi := DirichletCharacter("2100.257"); S:= CuspForms(chi, 1); N := Newforms(S);

Level:	$N$	$=$	$2100 = 2^{2} \cdot 3 \cdot 5^{2} \cdot 7$
Weight:	$k$	$=$	$1$
Character orbit:	$[\chi]$	$=$	2100.cj (of order $12$ , degree $4$ , minimal)

Newform invariants

comment:select newform

sage:traces = [8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-4] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(21)] == traces)

gp:f = lf[1] \\ Warning: the index may be different

Self dual:	no
Analytic conductor:	$1.04803652653$
Analytic rank:	$0$
Dimension:	$8$
Relative dimension:	$2$ over $\Q(\zeta_{12})$
Coefficient field:	$\Q(\zeta_{24})$
comment:defining polynomial gp:f.mod \\ as an extension of the character field
Defining polynomial:	$x^{8} - x^{4} + 1$ x^8 - x^4 + 1
Coefficient ring:	$\Z[a_1, a_2, a_3]$
Coefficient ring index:	$1$
Twist minimal:	yes
Projective image:	$D_{6}$
Projective field:	Galois closure of 6.2.22689450000.1

$q$ -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.

$f(q)$	$=$	$q - \zeta_{24} q^{3} + \zeta_{24}^{3} q^{7} + \zeta_{24}^{2} q^{9} + 2 \zeta_{24}^{9} q^{13} - \zeta_{24}^{4} q^{21} - \zeta_{24}^{3} q^{27} + (\zeta_{24}^{8} - 1) q^{31} + (\zeta_{24}^{7} + \zeta_{24}^{3}) q^{37} + \cdots + \zeta_{24}^{3} q^{97} +O(q^{100})$ q - z * q^3 + z^3 * q^7 + z^2 * q^9 + 2z^9 q^13 - z^4 * q^21 - z^3 * q^27 + (z^8 - 1) * q^31 + (z^7 + z^3) * q^37 - 2z^10 q^39 + (-z^5 - z) * q^43 + z^6 * q^49 + (z^4 + 1) * q^61 + z^5 * q^63 + z * q^73 + z^2 * q^79 + z^4 * q^81 - 2 * q^91 + (-z^9 + z) * q^93 + z^3 * q^97
$\operatorname{Tr}(f)(q)$	$=$	$8 q - 4 q^{21} - 12 q^{31} + 12 q^{61} + 4 q^{81} - 16 q^{91}+O(q^{100})$ 8 * q - 4 * q^21 - 12 * q^31 + 12 * q^61 + 4 * q^81 - 16 * q^91

Character values

We give the values of $\chi$ on generators for $\left(\mathbb{Z}/2100\mathbb{Z}\right)^\times$ .

$n$	$701$	$1051$	$1177$	$1501$
$\chi(n)$	$-1$	$1$	$-\zeta_{24}^{6}$	$-\zeta_{24}^{8}$

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}

257.1

0.258819	−	0.965926i
−0.258819	+	0.965926i
0.965926	+	0.258819i
−0.965926	−	0.258819i
0.965926	−	0.258819i
−0.965926	+	0.258819i
0.258819	+	0.965926i
−0.258819	−	0.965926i

−0.258819

0.965926i

−0.707107

0.707107i

−0.866025

−

0.500000i

257.2

0.258819

−

0.965926i

0.707107

−

0.707107i

−0.866025

−

0.500000i

593.1

−0.965926

−

0.258819i

0.707107

0.707107i

0.866025

0.500000i

593.2

0.965926

0.258819i

−0.707107

−

0.707107i

0.866025

0.500000i

857.1

−0.965926

0.258819i

0.707107

−

0.707107i

0.866025

−

0.500000i

857.2

0.965926

−

0.258819i

−0.707107

0.707107i

0.866025

−

0.500000i

1193.1

−0.258819

−

0.965926i

−0.707107

−

0.707107i

−0.866025

0.500000i

1193.2

0.258819

0.965926i

0.707107

0.707107i

−0.866025

0.500000i

Inner twists

Char	Parity	Ord	Mult	Type
1.a	even	1	1	trivial
3.b	odd	2	1	CM by $\Q(\sqrt{-3})$
5.b	even	2	1	inner
5.c	odd	4	2	inner
7.d	odd	6	1	inner
15.d	odd	2	1	inner
15.e	even	4	2	inner
21.g	even	6	1	inner
35.i	odd	6	1	inner
35.k	even	12	2	inner
105.p	even	6	1	inner
105.w	odd	12	2	inner

Twists

By twisting character orbit
Char	Parity	Ord	Mult	Type	Twist	Min	Dim
1.a	even	1	1	trivial	2100.1.cj.a	✓	8
3.b	odd	2	1	CM	2100.1.cj.a	✓	8
5.b	even	2	1	inner	2100.1.cj.a	✓	8
5.c	odd	4	2	inner	2100.1.cj.a	✓	8
7.d	odd	6	1	inner	2100.1.cj.a	✓	8
15.d	odd	2	1	inner	2100.1.cj.a	✓	8
15.e	even	4	2	inner	2100.1.cj.a	✓	8
21.g	even	6	1	inner	2100.1.cj.a	✓	8
35.i	odd	6	1	inner	2100.1.cj.a	✓	8
35.k	even	12	2	inner	2100.1.cj.a	✓	8
105.p	even	6	1	inner	2100.1.cj.a	✓	8
105.w	odd	12	2	inner	2100.1.cj.a	✓	8

By twisted newform orbit
Twist	Min	Dim	Char	Parity	Ord	Mult	Type
2100.1.cj.a	✓	8	1.a	even	1	1	trivial
2100.1.cj.a	✓	8	3.b	odd	2	1	CM
2100.1.cj.a	✓	8	5.b	even	2	1	inner
2100.1.cj.a	✓	8	5.c	odd	4	2	inner
2100.1.cj.a	✓	8	7.d	odd	6	1	inner
2100.1.cj.a	✓	8	15.d	odd	2	1	inner
2100.1.cj.a	✓	8	15.e	even	4	2	inner
2100.1.cj.a	✓	8	21.g	even	6	1	inner
2100.1.cj.a	✓	8	35.i	odd	6	1	inner
2100.1.cj.a	✓	8	35.k	even	12	2	inner
2100.1.cj.a	✓	8	105.p	even	6	1	inner
2100.1.cj.a	✓	8	105.w	odd	12	2	inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator $T_{13}^{4} + 16$ T13^4 + 16 acting on $S_{1}^{\mathrm{new}}(2100, [\chi])$ .

Hecke characteristic polynomials

$p$	$F_p(T)$
$2$	$T^{8}$ T^8
$3$	$T^{8} - T^{4} + 1$ T^8 - T^4 + 1
$5$	$T^{8}$ T^8
$7$	$(T^{4} + 1)^{2}$ (T^4 + 1)^2
$11$	$T^{8}$ T^8
$13$	$(T^{4} + 16)^{2}$ (T^4 + 16)^2
$17$	$T^{8}$ T^8
$19$	$T^{8}$ T^8
$23$	$T^{8}$ T^8
$29$	$T^{8}$ T^8
$31$	$(T^{2} + 3 T + 3)^{4}$ (T^2 + 3*T + 3)^4
$37$	$T^{8} - 9T^{4} + 81$ T^8 - 9*T^4 + 81
$41$	$T^{8}$ T^8
$43$	$(T^{4} + 9)^{2}$ (T^4 + 9)^2
$47$	$T^{8}$ T^8
$53$	$T^{8}$ T^8
$59$	$T^{8}$ T^8
$61$	$(T^{2} - 3 T + 3)^{4}$ (T^2 - 3*T + 3)^4
$67$	$T^{8}$ T^8
$71$	$T^{8}$ T^8
$73$	$T^{8} - T^{4} + 1$ T^8 - T^4 + 1
$79$	$(T^{4} - T^{2} + 1)^{2}$ (T^4 - T^2 + 1)^2
$83$	$T^{8}$ T^8
$89$	$T^{8}$ T^8
$97$	$(T^{4} + 1)^{2}$ (T^4 + 1)^2
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Elliptic curves over $\Q$
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$n$ :		e.g. 2-40 or 990-1000
Embeddings:		e.g. 1-3 or 257.2
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Introduction

L-functions

Modular forms

Varieties

Fields

Representations

Groups

Database

Properties

Related objects

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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	2100.1.cj.a

Level	$2100$
Weight	$1$
Character orbit	2100.cj
Analytic conductor	$1.048$
Analytic rank	$0$
Dimension	$8$
Projective image	$D_{6}$
CM discriminant	-3
Inner twists	$16$