LMFDB - Newform orbit 1600.1.bh.b

Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms

[N,k,chi] = [1600,1,Mod(191,1600)]

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

lf = mfeigenbasis(mf)

from sage.modular.dirichlet import DirichletCharacter

H = DirichletGroup(1600, base_ring=CyclotomicField(10))

chi = DirichletCharacter(H, H._module([5, 0, 2]))

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

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

chi := DirichletCharacter("1600.191");

S:= CuspForms(chi, 1);

N := Newforms(S);

Level:	$N$	$=$	$1600 = 2^{6} \cdot 5^{2}$
Weight:	$k$	$=$	$1$
Character orbit:	$[\chi]$	$=$	1600.bh (of order $10$ , 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:	$0.798504020213$
Analytic rank:	$0$
Dimension:	$8$
Relative dimension:	$2$ over $\Q(\zeta_{10})$
Coefficient field:	$\Q(\zeta_{20})$
comment: defining polynomial gp: f.mod \\ as an extension of the character field
Defining polynomial:	$x^{8} - x^{6} + x^{4} - x^{2} + 1$ x^8 - x^6 + x^4 - x^2 + 1
Coefficient ring:	$\Z[a_1, a_2, a_3]$
Coefficient ring index:	$1$
Twist minimal:	no (minimal twist has level 800)
Projective image:	$A_{5}$
Projective field:	Galois closure of 5.1.25000000.2

$q$ -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.

$f(q)$	$=$	$q - \zeta_{20}^{9} q^{3} - \zeta_{20}^{8} q^{5} + ( - \zeta_{20}^{7} - \zeta_{20}^{3}) q^{7} + (\zeta_{20}^{6} - 1) q^{13} - \zeta_{20}^{7} q^{15} + ( - \zeta_{20}^{7} + \zeta_{20}^{5}) q^{19} + ( - \zeta_{20}^{6} - \zeta_{20}^{2}) q^{21} + \cdots + (\zeta_{20}^{6} + \zeta_{20}^{2}) q^{97} +O(q^{100})$ q - z^9 * q^3 - z^8 * q^5 + (-z^7 - z^3) * q^7 + (z^6 - 1) * q^13 - z^7 * q^15 + (-z^7 + z^5) * q^19 + (-z^6 - z^2) * q^21 - z^7 * q^23 - z^6 * q^25 + z^7 * q^27 + (z^8 + 1) * q^29 + z * q^31 + (-z^5 - z) * q^35 + z^8 * q^37 + (z^9 + z^5) * q^39 + (-z^9 - z) * q^43 + (z^7 - z) * q^47 + (z^6 - z^4 - 1) * q^49 + z^4 * q^53 + (-z^6 + z^4) * q^57 + (z^9 - z^7) * q^59 + z^2 * q^61 + (z^8 + z^4) * q^65 - z^6 * q^69 + (-z^7 + z) * q^71 - z^2 * q^73 - z^5 * q^75 + (z^5 - z^3) * q^79 + z^6 * q^81 + z * q^83 + (-z^9 + z^7) * q^87 + (-z^9 + z^7 + 2z^3) q^91 + q^93 + (-z^5 + z^3) * q^95 + (z^6 + z^2) * q^97
$\operatorname{Tr}(f)(q)$	$=$	$8 q + 2 q^{5} - 6 q^{13} - 4 q^{21} - 2 q^{25} + 6 q^{29} - 2 q^{37} - 4 q^{49} - 2 q^{53} - 4 q^{57} + 2 q^{61} - 4 q^{65} - 2 q^{69} - 2 q^{73} + 2 q^{81} + 8 q^{93} + 4 q^{97}+O(q^{100})$ 8 * q + 2 * q^5 - 6 * q^13 - 4 * q^21 - 2 * q^25 + 6 * q^29 - 2 * q^37 - 4 * q^49 - 2 * q^53 - 4 * q^57 + 2 * q^61 - 4 * q^65 - 2 * q^69 - 2 * q^73 + 2 * q^81 + 8 * q^93 + 4 * q^97

Character values

We give the values of $\chi$ on generators for $\left(\mathbb{Z}/1600\mathbb{Z}\right)^\times$ .

$n$	$577$	$901$	$1151$
$\chi(n)$	$\zeta_{20}^{4}$	$1$	$-1$

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}

191.1

−0.951057	−	0.309017i
0.951057	+	0.309017i
−0.951057	+	0.309017i
0.951057	−	0.309017i
−0.587785	+	0.809017i
0.587785	−	0.809017i
−0.587785	−	0.809017i
0.587785	+	0.809017i

−0.951057

0.309017i

0.809017

−

0.587785i

1.61803i

191.2

0.951057

−

0.309017i

0.809017

−

0.587785i

−

1.61803i

511.1

−0.951057

−

0.309017i

0.809017

0.587785i

−

1.61803i

511.2

0.951057

0.309017i

0.809017

0.587785i

1.61803i

831.1

−0.587785

−

0.809017i

−0.309017

0.951057i

−

0.618034i

831.2

0.587785

0.809017i

−0.309017

0.951057i

0.618034i

1471.1

−0.587785

0.809017i

−0.309017

−

0.951057i

0.618034i

1471.2

0.587785

−

0.809017i

−0.309017

−

0.951057i

−

0.618034i

Inner twists

Char	Parity	Ord	Mult	Type
1.a	even	1	1	trivial
4.b	odd	2	1	inner
25.d	even	5	1	inner
100.j	odd	10	1	inner

Twists

By twisting character orbit
Char	Parity	Ord	Mult	Type	Twist	Min	Dim
1.a	even	1	1	trivial	1600.1.bh.b		8
4.b	odd	2	1	inner	1600.1.bh.b		8
8.b	even	2	1		800.1.bh.a	✓	8
8.d	odd	2	1		800.1.bh.a	✓	8
25.d	even	5	1	inner	1600.1.bh.b		8
40.e	odd	2	1		4000.1.bh.a		8
40.f	even	2	1		4000.1.bh.a		8
40.i	odd	4	1		4000.1.bf.a		8
40.i	odd	4	1		4000.1.bf.b		8
40.k	even	4	1		4000.1.bf.a		8
40.k	even	4	1		4000.1.bf.b		8
100.j	odd	10	1	inner	1600.1.bh.b		8
200.n	odd	10	1		800.1.bh.a	✓	8
200.o	even	10	1		4000.1.bh.a		8
200.s	odd	10	1		4000.1.bh.a		8
200.t	even	10	1		800.1.bh.a	✓	8
200.v	even	20	1		4000.1.bf.a		8
200.v	even	20	1		4000.1.bf.b		8
200.x	odd	20	1		4000.1.bf.a		8
200.x	odd	20	1		4000.1.bf.b		8

By twisted newform orbit
Twist	Min	Dim	Char	Parity	Ord	Mult	Type
800.1.bh.a	✓	8	8.b	even	2	1
800.1.bh.a	✓	8	8.d	odd	2	1
800.1.bh.a	✓	8	200.n	odd	10	1
800.1.bh.a	✓	8	200.t	even	10	1
1600.1.bh.b		8	1.a	even	1	1	trivial
1600.1.bh.b		8	4.b	odd	2	1	inner
1600.1.bh.b		8	25.d	even	5	1	inner
1600.1.bh.b		8	100.j	odd	10	1	inner
4000.1.bf.a		8	40.i	odd	4	1
4000.1.bf.a		8	40.k	even	4	1
4000.1.bf.a		8	200.v	even	20	1
4000.1.bf.a		8	200.x	odd	20	1
4000.1.bf.b		8	40.i	odd	4	1
4000.1.bf.b		8	40.k	even	4	1
4000.1.bf.b		8	200.v	even	20	1
4000.1.bf.b		8	200.x	odd	20	1
4000.1.bh.a		8	40.e	odd	2	1
4000.1.bh.a		8	40.f	even	2	1
4000.1.bh.a		8	200.o	even	10	1
4000.1.bh.a		8	200.s	odd	10	1

This newform subspace can be constructed as the kernel of the linear operator $T_{3}^{8} - T_{3}^{6} + T_{3}^{4} - T_{3}^{2} + 1$ T3^8 - T3^6 + T3^4 - T3^2 + 1 acting on $S_{1}^{\mathrm{new}}(1600, [\chi])$ .

Hecke characteristic polynomials

$p$	$F_p(T)$
$2$	$T^{8}$ T^8
$3$	$T^{8} - T^{6} + T^{4} + \cdots + 1$ T^8 - T^6 + T^4 - T^2 + 1
$5$	$(T^{4} - T^{3} + T^{2} + \cdots + 1)^{2}$ (T^4 - T^3 + T^2 - T + 1)^2
$7$	$(T^{4} + 3 T^{2} + 1)^{2}$ (T^4 + 3*T^2 + 1)^2
$11$	$T^{8}$ T^8
$13$	$(T^{4} + 3 T^{3} + 4 T^{2} + \cdots + 1)^{2}$ (T^4 + 3T^3 + 4T^2 + 2*T + 1)^2
$17$	$T^{8}$ T^8
$19$	$T^{8} + T^{6} + 6 T^{4} + \cdots + 1$ T^8 + T^6 + 6T^4 - 4T^2 + 1
$23$	$T^{8} - T^{6} + T^{4} + \cdots + 1$ T^8 - T^6 + T^4 - T^2 + 1
$29$	$(T^{4} - 3 T^{3} + 4 T^{2} + \cdots + 1)^{2}$ (T^4 - 3T^3 + 4T^2 - 2*T + 1)^2
$31$	$T^{8} - T^{6} + T^{4} + \cdots + 1$ T^8 - T^6 + T^4 - T^2 + 1
$37$	$(T^{4} + T^{3} + T^{2} + \cdots + 1)^{2}$ (T^4 + T^3 + T^2 + T + 1)^2
$41$	$T^{8}$ T^8
$43$	$(T^{4} + 3 T^{2} + 1)^{2}$ (T^4 + 3*T^2 + 1)^2
$47$	$T^{8} - 4 T^{6} + \cdots + 1$ T^8 - 4T^6 + 6T^4 + T^2 + 1
$53$	$(T^{4} + T^{3} + T^{2} + \cdots + 1)^{2}$ (T^4 + T^3 + T^2 + T + 1)^2
$59$	$T^{8} - 4 T^{6} + \cdots + 1$ T^8 - 4T^6 + 6T^4 + T^2 + 1
$61$	$(T^{4} - T^{3} + T^{2} + \cdots + 1)^{2}$ (T^4 - T^3 + T^2 - T + 1)^2
$67$	$T^{8}$ T^8
$71$	$T^{8} - 4 T^{6} + \cdots + 1$ T^8 - 4T^6 + 6T^4 + T^2 + 1
$73$	$(T^{4} + T^{3} + T^{2} + \cdots + 1)^{2}$ (T^4 + T^3 + T^2 + T + 1)^2
$79$	$T^{8} + T^{6} + 6 T^{4} + \cdots + 1$ T^8 + T^6 + 6T^4 - 4T^2 + 1
$83$	$T^{8} - T^{6} + T^{4} + \cdots + 1$ T^8 - T^6 + T^4 - T^2 + 1
$89$	$T^{8}$ T^8
$97$	$(T^{4} - 2 T^{3} + 4 T^{2} + \cdots + 1)^{2}$ (T^4 - 2T^3 + 4T^2 - 3*T + 1)^2
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Overview	Random
Universe	Knowledge

Classical	Maass
Hilbert	Bianchi

Elliptic curves over $\Q$
Elliptic curves over $\Q(\alpha)$
Genus 2 curves over $\Q$
Higher genus families
Abelian varieties over $\F_{q}$

$n$ :		e.g. 2-40 or 990-1000
Embeddings:		e.g. 1-3 or 191.2
Significant digits:
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Introduction

L-functions

Modular forms

Varieties

Fields

Representations

Groups

Database

Properties

Related objects

Downloads

Learn more

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	1600.1.bh.b

Level	$1600$
Weight	$1$
Character orbit	1600.bh
Analytic conductor	$0.799$
Analytic rank	$0$
Dimension	$8$
Projective image	$A_{5}$
CM/RM	no
Inner twists	$4$