Properties

Label 880.2.t.a
Level $880$
Weight $2$
Character orbit 880.t
Analytic conductor $7.027$
Analytic rank $0$
Dimension $8$
Inner twists $4$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [880,2,Mod(197,880)] 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("880.197"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(880, base_ring=CyclotomicField(4)) chi = DirichletCharacter(H, H._module([0, 1, 1, 2])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 880 = 2^{4} \cdot 5 \cdot 11 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 880.t (of order \(4\), degree \(2\), minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [8] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(1)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(7.02683537787\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(i)\)
Coefficient field: 8.0.40960000.1
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 7x^{4} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{4} \)
Twist minimal: yes
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 \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (\beta_{6} - \beta_1) q^{2} + \beta_{3} q^{3} + 2 q^{4} + \beta_{4} q^{5} + ( - \beta_{6} - \beta_1) q^{6} - \beta_{7} q^{7} + (2 \beta_{6} - 2 \beta_1) q^{8} + 2 q^{9} + (\beta_{7} - \beta_{2}) q^{10}+ \cdots + (2 \beta_{5} - 2 \beta_{4} - 2 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 16 q^{4} + 16 q^{9} + 32 q^{16} + 8 q^{22} + 24 q^{23} + 40 q^{25} - 48 q^{26} - 32 q^{31} + 40 q^{34} + 32 q^{36} - 24 q^{38} + 48 q^{53} - 40 q^{55} - 16 q^{58} - 24 q^{59} + 64 q^{64} - 8 q^{66}+ \cdots + 32 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 7x^{4} + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{5} + 5\nu ) / 3 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{5} + 11\nu ) / 3 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{6} + 8\nu^{2} ) / 3 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 2\nu^{4} + 7 ) / 3 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( \nu^{6} + 6\nu^{2} \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 2\nu^{7} + 13\nu^{3} ) / 3 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 4\nu^{7} + 29\nu^{3} ) / 3 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{2} - \beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( -\beta_{5} + 3\beta_{3} ) / 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{7} - 2\beta_{6} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( 3\beta_{4} - 7 ) / 2 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -5\beta_{2} + 11\beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 4\beta_{5} - 9\beta_{3} \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( -13\beta_{7} + 29\beta_{6} ) / 2 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/880\mathbb{Z}\right)^\times\).

\(n\) \(111\) \(177\) \(321\) \(661\)
\(\chi(n)\) \(1\) \(-\beta_{3}\) \(-1\) \(-\beta_{3}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
197.1
−1.14412 + 1.14412i
0.437016 0.437016i
1.14412 1.14412i
−0.437016 + 0.437016i
−1.14412 1.14412i
0.437016 + 0.437016i
1.14412 + 1.14412i
−0.437016 0.437016i
−1.41421 1.00000i 2.00000 −2.23607 1.41421i −1.58114 1.58114i −2.82843 2.00000 3.16228
197.2 −1.41421 1.00000i 2.00000 2.23607 1.41421i 1.58114 + 1.58114i −2.82843 2.00000 −3.16228
197.3 1.41421 1.00000i 2.00000 −2.23607 1.41421i 1.58114 + 1.58114i 2.82843 2.00000 −3.16228
197.4 1.41421 1.00000i 2.00000 2.23607 1.41421i −1.58114 1.58114i 2.82843 2.00000 3.16228
813.1 −1.41421 1.00000i 2.00000 −2.23607 1.41421i −1.58114 + 1.58114i −2.82843 2.00000 3.16228
813.2 −1.41421 1.00000i 2.00000 2.23607 1.41421i 1.58114 1.58114i −2.82843 2.00000 −3.16228
813.3 1.41421 1.00000i 2.00000 −2.23607 1.41421i 1.58114 1.58114i 2.82843 2.00000 −3.16228
813.4 1.41421 1.00000i 2.00000 2.23607 1.41421i −1.58114 + 1.58114i 2.82843 2.00000 3.16228
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 197.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
11.b odd 2 1 inner
80.i odd 4 1 inner
880.t even 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 880.2.t.a 8
5.c odd 4 1 880.2.bl.a yes 8
11.b odd 2 1 inner 880.2.t.a 8
16.e even 4 1 880.2.bl.a yes 8
55.e even 4 1 880.2.bl.a yes 8
80.i odd 4 1 inner 880.2.t.a 8
176.l odd 4 1 880.2.bl.a yes 8
880.t even 4 1 inner 880.2.t.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
880.2.t.a 8 1.a even 1 1 trivial
880.2.t.a 8 11.b odd 2 1 inner
880.2.t.a 8 80.i odd 4 1 inner
880.2.t.a 8 880.t even 4 1 inner
880.2.bl.a yes 8 5.c odd 4 1
880.2.bl.a yes 8 16.e even 4 1
880.2.bl.a yes 8 55.e even 4 1
880.2.bl.a yes 8 176.l odd 4 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{2} + 1 \) acting on \(S_{2}^{\mathrm{new}}(880, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{2} - 2)^{4} \) Copy content Toggle raw display
$3$ \( (T^{2} + 1)^{4} \) Copy content Toggle raw display
$5$ \( (T^{2} - 5)^{4} \) Copy content Toggle raw display
$7$ \( (T^{4} + 25)^{2} \) Copy content Toggle raw display
$11$ \( T^{8} + 82T^{4} + 14641 \) Copy content Toggle raw display
$13$ \( (T^{2} - 18)^{4} \) Copy content Toggle raw display
$17$ \( (T^{4} + 625)^{2} \) Copy content Toggle raw display
$19$ \( T^{8} + 3122 T^{4} + 14641 \) Copy content Toggle raw display
$23$ \( (T^{4} - 12 T^{3} + \cdots + 64)^{2} \) Copy content Toggle raw display
$29$ \( T^{8} + 6242 T^{4} + 2825761 \) Copy content Toggle raw display
$31$ \( (T^{2} + 8 T - 29)^{4} \) Copy content Toggle raw display
$37$ \( (T^{4} + 98 T^{2} + 1681)^{2} \) Copy content Toggle raw display
$41$ \( T^{8} \) Copy content Toggle raw display
$43$ \( (T^{4} + 56 T^{2} + 64)^{2} \) Copy content Toggle raw display
$47$ \( (T^{4} + 1600)^{2} \) Copy content Toggle raw display
$53$ \( (T^{2} - 12 T + 31)^{4} \) Copy content Toggle raw display
$59$ \( (T^{4} + 12 T^{3} + \cdots + 64)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} + 25)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( (T^{4} + 82 T^{2} + 961)^{2} \) Copy content Toggle raw display
$73$ \( T^{8} + 12032 T^{4} + 65536 \) Copy content Toggle raw display
$79$ \( (T^{4} - 56 T^{2} + 64)^{2} \) Copy content Toggle raw display
$83$ \( (T^{4} - 196 T^{2} + 6724)^{2} \) Copy content Toggle raw display
$89$ \( (T + 3)^{8} \) Copy content Toggle raw display
$97$ \( (T^{4} - 16 T^{3} + \cdots + 3364)^{2} \) Copy content Toggle raw display
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