Properties

Label 496.2.bg.a
Level $496$
Weight $2$
Character orbit 496.bg
Analytic conductor $3.961$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [496,2,Mod(49,496)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(496, base_ring=CyclotomicField(30))
 
chi = DirichletCharacter(H, H._module([0, 0, 26]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("496.49");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 496 = 2^{4} \cdot 31 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 496.bg (of order \(15\), degree \(8\), 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: \(3.96057994026\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: \(\Q(\zeta_{15})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{7} + x^{5} - x^{4} + x^{3} - x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 62)
Sato-Tate group: $\mathrm{SU}(2)[C_{15}]$

$q$-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 primitive root of unity \(\zeta_{15}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + ( - \zeta_{15}^{5} + \zeta_{15}^{4} - 1) q^{3} + ( - \zeta_{15}^{4} + 2 \zeta_{15}^{3} + \cdots + 1) q^{5}+ \cdots + (2 \zeta_{15}^{7} - \zeta_{15}^{6} + \cdots - 2) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - \zeta_{15}^{5} + \zeta_{15}^{4} - 1) q^{3} + ( - \zeta_{15}^{4} + 2 \zeta_{15}^{3} + \cdots + 1) q^{5}+ \cdots + (3 \zeta_{15}^{7} - 6 \zeta_{15}^{6} + \cdots - 6) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 3 q^{3} + q^{5} - 2 q^{7} - 4 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 3 q^{3} + q^{5} - 2 q^{7} - 4 q^{9} + 13 q^{11} + 6 q^{15} - 2 q^{17} + 3 q^{19} + q^{21} - 3 q^{23} + q^{25} + 18 q^{27} + 11 q^{29} - 11 q^{31} - 2 q^{33} - 16 q^{35} + 6 q^{37} - 10 q^{39} - 19 q^{41} + 26 q^{43} + 16 q^{45} - q^{47} - 23 q^{49} + 16 q^{51} + 17 q^{53} - 7 q^{55} + 6 q^{57} - 8 q^{59} + 48 q^{61} + 14 q^{63} - 30 q^{65} - 12 q^{67} - 7 q^{69} - 9 q^{71} - 33 q^{73} - 18 q^{75} - 13 q^{77} + 19 q^{79} - 16 q^{81} - 40 q^{83} + 29 q^{85} - 11 q^{87} + 8 q^{89} - 20 q^{91} + 44 q^{93} - 36 q^{95} - 23 q^{97} - 7 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/496\mathbb{Z}\right)^\times\).

\(n\) \(63\) \(65\) \(373\)
\(\chi(n)\) \(1\) \(1 - \zeta_{15}^{2} + \zeta_{15}^{3} - \zeta_{15}^{4} + \zeta_{15}^{6} - \zeta_{15}^{7}\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
49.1
0.669131 + 0.743145i
0.669131 0.743145i
−0.104528 0.994522i
0.913545 + 0.406737i
0.913545 0.406737i
−0.978148 0.207912i
−0.978148 + 0.207912i
−0.104528 + 0.994522i
0 −1.47815 + 0.658114i 0 −0.204489 0.354185i 0 −0.809017 0.898504i 0 −0.255585 + 0.283856i 0
81.1 0 −1.47815 0.658114i 0 −0.204489 + 0.354185i 0 −0.809017 + 0.898504i 0 −0.255585 0.283856i 0
113.1 0 0.413545 + 0.459289i 0 1.78716 + 3.09546i 0 0.309017 + 2.94010i 0 0.273659 2.60369i 0
193.1 0 −0.604528 + 0.128496i 0 0.139886 0.242290i 0 0.309017 + 0.137583i 0 −2.39169 + 1.06485i 0
257.1 0 −0.604528 0.128496i 0 0.139886 + 0.242290i 0 0.309017 0.137583i 0 −2.39169 1.06485i 0
289.1 0 0.169131 + 1.60917i 0 −1.22256 2.11754i 0 −0.809017 0.171962i 0 0.373619 0.0794152i 0
369.1 0 0.169131 1.60917i 0 −1.22256 + 2.11754i 0 −0.809017 + 0.171962i 0 0.373619 + 0.0794152i 0
417.1 0 0.413545 0.459289i 0 1.78716 3.09546i 0 0.309017 2.94010i 0 0.273659 + 2.60369i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 49.1
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
31.g even 15 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 496.2.bg.a 8
4.b odd 2 1 62.2.g.a 8
12.b even 2 1 558.2.ba.f 8
31.g even 15 1 inner 496.2.bg.a 8
124.n odd 30 1 62.2.g.a 8
124.n odd 30 1 1922.2.a.q 4
124.p even 30 1 1922.2.a.o 4
372.bd even 30 1 558.2.ba.f 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
62.2.g.a 8 4.b odd 2 1
62.2.g.a 8 124.n odd 30 1
496.2.bg.a 8 1.a even 1 1 trivial
496.2.bg.a 8 31.g even 15 1 inner
558.2.ba.f 8 12.b even 2 1
558.2.ba.f 8 372.bd even 30 1
1922.2.a.o 4 124.p even 30 1
1922.2.a.q 4 124.n odd 30 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{8} + 3T_{3}^{7} + 5T_{3}^{6} + 8T_{3}^{5} + 9T_{3}^{4} + 2T_{3}^{3} + 2T_{3} + 1 \) acting on \(S_{2}^{\mathrm{new}}(496, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} + 3 T^{7} + \cdots + 1 \) Copy content Toggle raw display
$5$ \( T^{8} - T^{7} + 10 T^{6} + \cdots + 1 \) Copy content Toggle raw display
$7$ \( T^{8} + 2 T^{7} + \cdots + 1 \) Copy content Toggle raw display
$11$ \( T^{8} - 13 T^{7} + \cdots + 3721 \) Copy content Toggle raw display
$13$ \( T^{8} - 40 T^{6} + \cdots + 6400 \) Copy content Toggle raw display
$17$ \( T^{8} + 2 T^{7} + \cdots + 841 \) Copy content Toggle raw display
$19$ \( T^{8} - 3 T^{7} + \cdots + 81 \) Copy content Toggle raw display
$23$ \( T^{8} + 3 T^{7} + \cdots + 32041 \) Copy content Toggle raw display
$29$ \( T^{8} - 11 T^{7} + \cdots + 2430481 \) Copy content Toggle raw display
$31$ \( T^{8} + 11 T^{7} + \cdots + 923521 \) Copy content Toggle raw display
$37$ \( T^{8} - 6 T^{7} + \cdots + 961 \) Copy content Toggle raw display
$41$ \( T^{8} + 19 T^{7} + \cdots + 201601 \) Copy content Toggle raw display
$43$ \( T^{8} - 26 T^{7} + \cdots + 703921 \) Copy content Toggle raw display
$47$ \( T^{8} + T^{7} + 72 T^{6} + \cdots + 1 \) Copy content Toggle raw display
$53$ \( T^{8} - 17 T^{7} + \cdots + 32761 \) Copy content Toggle raw display
$59$ \( T^{8} + 8 T^{7} + \cdots + 75672601 \) Copy content Toggle raw display
$61$ \( (T^{4} - 24 T^{3} + \cdots - 279)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} + 12 T^{7} + \cdots + 841 \) Copy content Toggle raw display
$71$ \( T^{8} + 9 T^{7} + \cdots + 4626801 \) Copy content Toggle raw display
$73$ \( T^{8} + 33 T^{7} + \cdots + 1515361 \) Copy content Toggle raw display
$79$ \( T^{8} - 19 T^{7} + \cdots + 48427681 \) Copy content Toggle raw display
$83$ \( T^{8} + 40 T^{7} + \cdots + 819025 \) Copy content Toggle raw display
$89$ \( T^{8} - 8 T^{7} + \cdots + 961 \) Copy content Toggle raw display
$97$ \( T^{8} + 23 T^{7} + \cdots + 154977601 \) Copy content Toggle raw display
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