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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [80,5,Mod(17,80)] mf = mfinit([N,k,chi],0) lf = mfeigenbasis(mf)
 
Copy content magma:// Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code chi := DirichletCharacter("80.17"); S:= CuspForms(chi, 5); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(80, base_ring=CyclotomicField(4)) chi = DirichletCharacter(H, H._module([0, 0, 1])) N = Newforms(chi, 5, names="a")
 
Level: \( N \) \(=\) \( 80 = 2^{4} \cdot 5 \)
Weight: \( k \) \(=\) \( 5 \)
Character orbit: \([\chi]\) \(=\) 80.p (of order \(4\), degree \(2\), not minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [4,0,12] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(3)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(8.26959704671\)
Analytic rank: \(0\)
Dimension: \(4\)
Relative dimension: \(2\) over \(\Q(i)\)
Coefficient field: \(\Q(i, \sqrt{29})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} + 15x^{2} + 49 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 2^{4}\cdot 5 \)
Twist minimal: no (minimal twist has level 40)
Sato-Tate group: $\mathrm{SU}(2)[C_{4}]$

$q$-expansion

Copy content comment:q-expansion
 
Copy content sage:f.q_expansion() # note that sage often uses an isomorphic number field
 
Copy content gp:mfcoefs(f, 20)
 

Coefficients of the \(q\)-expansion are expressed in terms of a basis \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + ( - 3 \beta_1 + 3) q^{3} + ( - \beta_{3} - 6 \beta_1 - 3) q^{5} + (\beta_{3} - 3 \beta_{2} - 11 \beta_1 - 11) q^{7} + 63 \beta_1 q^{9} + (4 \beta_{3} - 2 \beta_{2} + 74) q^{11} + ( - 3 \beta_{3} - \beta_{2} + \cdots + 79) q^{13}+ \cdots + ( - 126 \beta_{3} - 252 \beta_{2} + 4662 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 12 q^{3} - 12 q^{5} - 44 q^{7} + 296 q^{11} + 316 q^{13} - 108 q^{15} - 220 q^{17} - 264 q^{21} - 652 q^{23} + 1284 q^{25} + 1728 q^{27} + 2760 q^{31} + 888 q^{33} - 7092 q^{35} - 2052 q^{37} - 4312 q^{41}+ \cdots + 11812 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} + 15x^{2} + 49 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{3} + 8\nu ) / 7 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 4\nu^{3} + 28\nu^{2} + 88\nu + 210 ) / 7 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 2\nu^{3} - 56\nu^{2} + 44\nu - 420 ) / 7 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{3} + 2\beta_{2} - 10\beta_1 ) / 20 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( -2\beta_{3} + \beta_{2} - 150 ) / 20 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -2\beta_{3} - 4\beta_{2} + 55\beta_1 ) / 5 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/80\mathbb{Z}\right)^\times\).

\(n\) \(17\) \(21\) \(31\)
\(\chi(n)\) \(\beta_{1}\) \(1\) \(1\)

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.

Copy content comment:embeddings in the coefficient field
 
Copy content gp:mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
17.1
3.19258i
2.19258i
3.19258i
2.19258i
0 3.00000 3.00000i 0 −24.5407 + 4.77033i 0 42.8516 + 42.8516i 0 63.0000i 0
17.2 0 3.00000 3.00000i 0 18.5407 16.7703i 0 −64.8516 64.8516i 0 63.0000i 0
33.1 0 3.00000 + 3.00000i 0 −24.5407 4.77033i 0 42.8516 42.8516i 0 63.0000i 0
33.2 0 3.00000 + 3.00000i 0 18.5407 + 16.7703i 0 −64.8516 + 64.8516i 0 63.0000i 0
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
5.c odd 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 80.5.p.f 4
4.b odd 2 1 40.5.l.b 4
5.b even 2 1 400.5.p.g 4
5.c odd 4 1 inner 80.5.p.f 4
5.c odd 4 1 400.5.p.g 4
8.b even 2 1 320.5.p.k 4
8.d odd 2 1 320.5.p.n 4
12.b even 2 1 360.5.v.b 4
20.d odd 2 1 200.5.l.c 4
20.e even 4 1 40.5.l.b 4
20.e even 4 1 200.5.l.c 4
40.i odd 4 1 320.5.p.k 4
40.k even 4 1 320.5.p.n 4
60.l odd 4 1 360.5.v.b 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
40.5.l.b 4 4.b odd 2 1
40.5.l.b 4 20.e even 4 1
80.5.p.f 4 1.a even 1 1 trivial
80.5.p.f 4 5.c odd 4 1 inner
200.5.l.c 4 20.d odd 2 1
200.5.l.c 4 20.e even 4 1
320.5.p.k 4 8.b even 2 1
320.5.p.k 4 40.i odd 4 1
320.5.p.n 4 8.d odd 2 1
320.5.p.n 4 40.k even 4 1
360.5.v.b 4 12.b even 2 1
360.5.v.b 4 60.l odd 4 1
400.5.p.g 4 5.b even 2 1
400.5.p.g 4 5.c odd 4 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{2} - 6T_{3} + 18 \) acting on \(S_{5}^{\mathrm{new}}(80, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( (T^{2} - 6 T + 18)^{2} \) Copy content Toggle raw display
$5$ \( T^{4} + 12 T^{3} + \cdots + 390625 \) Copy content Toggle raw display
$7$ \( T^{4} + 44 T^{3} + \cdots + 30891364 \) Copy content Toggle raw display
$11$ \( (T^{2} - 148 T - 6124)^{2} \) Copy content Toggle raw display
$13$ \( T^{4} - 316 T^{3} + \cdots + 44649124 \) Copy content Toggle raw display
$17$ \( T^{4} + \cdots + 7525562500 \) Copy content Toggle raw display
$19$ \( T^{4} + 93888 T^{2} + 563777536 \) Copy content Toggle raw display
$23$ \( T^{4} + 652 T^{3} + \cdots + 879844 \) Copy content Toggle raw display
$29$ \( T^{4} + \cdots + 167195938816 \) Copy content Toggle raw display
$31$ \( (T^{2} - 1380 T + 186100)^{2} \) Copy content Toggle raw display
$37$ \( T^{4} + \cdots + 1322182619044 \) Copy content Toggle raw display
$41$ \( (T^{2} + 2156 T - 2596316)^{2} \) Copy content Toggle raw display
$43$ \( T^{4} + \cdots + 5932527319684 \) Copy content Toggle raw display
$47$ \( T^{4} + \cdots + 3139055540644 \) Copy content Toggle raw display
$53$ \( T^{4} + \cdots + 21974737549284 \) Copy content Toggle raw display
$59$ \( T^{4} + \cdots + 242185305788416 \) Copy content Toggle raw display
$61$ \( (T^{2} + 6060 T - 4228700)^{2} \) Copy content Toggle raw display
$67$ \( T^{4} + \cdots + 2926898229124 \) Copy content Toggle raw display
$71$ \( (T^{2} + 1116 T - 15569036)^{2} \) Copy content Toggle raw display
$73$ \( T^{4} + \cdots + 12\!\cdots\!24 \) Copy content Toggle raw display
$79$ \( T^{4} + \cdots + 618613200388096 \) Copy content Toggle raw display
$83$ \( T^{4} + \cdots + 14274961481284 \) Copy content Toggle raw display
$89$ \( T^{4} + \cdots + 17\!\cdots\!36 \) Copy content Toggle raw display
$97$ \( T^{4} + \cdots + 98478194209924 \) Copy content Toggle raw display
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