Properties

Label 975.2.bu.a
Level $975$
Weight $2$
Character orbit 975.bu
Analytic conductor $7.785$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [975,2,Mod(7,975)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(975, base_ring=CyclotomicField(12))
 
chi = DirichletCharacter(H, H._module([0, 3, 11]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("975.7");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 975 = 3 \cdot 5^{2} \cdot 13 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 975.bu (of order \(12\), degree \(4\), 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: \(7.78541419707\)
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: \( x^{8} - x^{4} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{12}]$

$q$-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 \(\zeta_{24}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (\zeta_{24}^{7} - \zeta_{24}^{5} + \zeta_{24}) q^{2} + \zeta_{24}^{5} q^{3} + ( - \zeta_{24}^{6} - \zeta_{24}^{2}) q^{4} + (\zeta_{24}^{2} - 1) q^{6} + ( - \zeta_{24}^{7} - \zeta_{24}^{5}) q^{8} + (\zeta_{24}^{6} - \zeta_{24}^{2}) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + (\zeta_{24}^{7} - \zeta_{24}^{5} + \zeta_{24}) q^{2} + \zeta_{24}^{5} q^{3} + ( - \zeta_{24}^{6} - \zeta_{24}^{2}) q^{4} + (\zeta_{24}^{2} - 1) q^{6} + ( - \zeta_{24}^{7} - \zeta_{24}^{5}) q^{8} + (\zeta_{24}^{6} - \zeta_{24}^{2}) q^{9} + (\zeta_{24}^{6} - 3 \zeta_{24}^{4} + \cdots + 4) q^{11}+ \cdots + (4 \zeta_{24}^{6} - \zeta_{24}^{4} + \cdots + 4) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 8 q^{6}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 8 q^{6} + 20 q^{11} + 4 q^{16} - 36 q^{19} + 8 q^{24} - 20 q^{26} - 12 q^{29} + 24 q^{31} + 40 q^{34} + 12 q^{36} - 8 q^{39} - 8 q^{41} + 12 q^{44} - 8 q^{46} + 28 q^{49} - 8 q^{54} - 12 q^{59} - 16 q^{61} + 32 q^{64} - 40 q^{66} - 8 q^{69} + 56 q^{71} - 36 q^{74} - 36 q^{76} + 4 q^{81} + 16 q^{86} - 52 q^{89} - 12 q^{94} - 36 q^{96} + 28 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/975\mathbb{Z}\right)^\times\).

\(n\) \(301\) \(326\) \(352\)
\(\chi(n)\) \(\zeta_{24}^{2} - \zeta_{24}^{6}\) \(1\) \(\zeta_{24}^{6}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
7.1
−0.965926 0.258819i
0.965926 + 0.258819i
0.258819 + 0.965926i
−0.258819 0.965926i
−0.965926 + 0.258819i
0.965926 0.258819i
0.258819 0.965926i
−0.258819 + 0.965926i
−0.448288 0.258819i −0.258819 0.965926i −0.866025 1.50000i 0 −0.133975 + 0.500000i 0 1.93185i −0.866025 + 0.500000i 0
7.2 0.448288 + 0.258819i 0.258819 + 0.965926i −0.866025 1.50000i 0 −0.133975 + 0.500000i 0 1.93185i −0.866025 + 0.500000i 0
232.1 −1.67303 + 0.965926i 0.965926 + 0.258819i 0.866025 1.50000i 0 −1.86603 + 0.500000i 0 0.517638i 0.866025 + 0.500000i 0
232.2 1.67303 0.965926i −0.965926 0.258819i 0.866025 1.50000i 0 −1.86603 + 0.500000i 0 0.517638i 0.866025 + 0.500000i 0
418.1 −0.448288 + 0.258819i −0.258819 + 0.965926i −0.866025 + 1.50000i 0 −0.133975 0.500000i 0 1.93185i −0.866025 0.500000i 0
418.2 0.448288 0.258819i 0.258819 0.965926i −0.866025 + 1.50000i 0 −0.133975 0.500000i 0 1.93185i −0.866025 0.500000i 0
643.1 −1.67303 0.965926i 0.965926 0.258819i 0.866025 + 1.50000i 0 −1.86603 0.500000i 0 0.517638i 0.866025 0.500000i 0
643.2 1.67303 + 0.965926i −0.965926 + 0.258819i 0.866025 + 1.50000i 0 −1.86603 0.500000i 0 0.517638i 0.866025 0.500000i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 7.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
5.b even 2 1 inner
65.o even 12 1 inner
65.t even 12 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 975.2.bu.a yes 8
5.b even 2 1 inner 975.2.bu.a yes 8
5.c odd 4 2 975.2.bl.b 8
13.f odd 12 1 975.2.bl.b 8
65.o even 12 1 inner 975.2.bu.a yes 8
65.s odd 12 1 975.2.bl.b 8
65.t even 12 1 inner 975.2.bu.a yes 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
975.2.bl.b 8 5.c odd 4 2
975.2.bl.b 8 13.f odd 12 1
975.2.bl.b 8 65.s odd 12 1
975.2.bu.a yes 8 1.a even 1 1 trivial
975.2.bu.a yes 8 5.b even 2 1 inner
975.2.bu.a yes 8 65.o even 12 1 inner
975.2.bu.a yes 8 65.t even 12 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(975, [\chi])\):

\( T_{2}^{8} - 4T_{2}^{6} + 15T_{2}^{4} - 4T_{2}^{2} + 1 \) Copy content Toggle raw display
\( T_{7} \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} - 4 T^{6} + \cdots + 1 \) Copy content Toggle raw display
$3$ \( T^{8} - T^{4} + 1 \) Copy content Toggle raw display
$5$ \( T^{8} \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( (T^{4} - 10 T^{3} + \cdots + 529)^{2} \) Copy content Toggle raw display
$13$ \( T^{8} - 337 T^{4} + 28561 \) Copy content Toggle raw display
$17$ \( T^{8} + 36 T^{6} + \cdots + 456976 \) Copy content Toggle raw display
$19$ \( (T^{4} + 18 T^{3} + \cdots + 2916)^{2} \) Copy content Toggle raw display
$23$ \( T^{8} - 24 T^{6} + \cdots + 1 \) Copy content Toggle raw display
$29$ \( (T^{4} + 6 T^{3} + \cdots + 2116)^{2} \) Copy content Toggle raw display
$31$ \( (T^{2} - 6 T + 18)^{4} \) Copy content Toggle raw display
$37$ \( T^{8} + 76 T^{6} + \cdots + 1874161 \) Copy content Toggle raw display
$41$ \( (T^{4} + 4 T^{3} + \cdots + 1936)^{2} \) Copy content Toggle raw display
$43$ \( T^{8} + 180 T^{6} + \cdots + 16 \) Copy content Toggle raw display
$47$ \( (T^{2} - 2)^{4} \) Copy content Toggle raw display
$53$ \( T^{8} + 3104T^{4} + 256 \) Copy content Toggle raw display
$59$ \( (T^{4} + 6 T^{3} + 90 T^{2} + \cdots + 36)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} + 8 T^{3} + \cdots + 121)^{2} \) Copy content Toggle raw display
$67$ \( (T^{4} - 6 T^{2} + 36)^{2} \) Copy content Toggle raw display
$71$ \( (T^{4} - 28 T^{3} + \cdots + 14641)^{2} \) Copy content Toggle raw display
$73$ \( (T^{4} + 12 T^{2} + 9)^{2} \) Copy content Toggle raw display
$79$ \( (T^{4} + 104 T^{2} + 2116)^{2} \) Copy content Toggle raw display
$83$ \( (T^{4} - 388 T^{2} + 27889)^{2} \) Copy content Toggle raw display
$89$ \( (T^{4} + 26 T^{3} + \cdots + 8836)^{2} \) Copy content Toggle raw display
$97$ \( T^{8} - 76 T^{6} + \cdots + 14641 \) Copy content Toggle raw display
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