Properties

Label 216.3.r.a
Level $216$
Weight $3$
Character orbit 216.r
Analytic conductor $5.886$
Analytic rank $0$
Dimension $12$
CM discriminant -8
Inner twists $4$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [216,3,Mod(43,216)] 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("216.43"); S:= CuspForms(chi, 3); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(216, base_ring=CyclotomicField(18)) chi = DirichletCharacter(H, H._module([9, 9, 4])) N = Newforms(chi, 3, names="a")
 
Level: \( N \) \(=\) \( 216 = 2^{3} \cdot 3^{3} \)
Weight: \( k \) \(=\) \( 3 \)
Character orbit: \([\chi]\) \(=\) 216.r (of order \(18\), degree \(6\), minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [12] 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: \(5.88557371018\)
Analytic rank: \(0\)
Dimension: \(12\)
Relative dimension: \(2\) over \(\Q(\zeta_{18})\)
Coefficient field: 12.0.101559956668416.1
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{12} - 8x^{6} + 64 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 2^{6} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{18}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{11}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + 2 \beta_{2} q^{2} + ( - \beta_{11} - \beta_{8} + \beta_{5}) q^{3} + 4 \beta_{4} q^{4} + ( - 2 \beta_{10} + 2 \beta_1) q^{6} + 8 \beta_{6} q^{8} + ( - 7 \beta_{10} - 2 \beta_{7} + 7 \beta_{4}) q^{9}+ \cdots + ( - 35 \beta_{11} + 97 \beta_{10} + \cdots - 7 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 12 q + 48 q^{8} - 42 q^{11} + 24 q^{12} + 168 q^{18} + 84 q^{22} - 138 q^{27} + 186 q^{33} + 12 q^{34} + 408 q^{38} + 138 q^{41} - 42 q^{43} - 588 q^{51} - 246 q^{57} - 492 q^{59} - 384 q^{64} - 186 q^{67}+ \cdots + 588 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{12} - 8x^{6} + 64 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( 2\nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{2} ) / 2 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{3} \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( \nu^{4} ) / 4 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( \nu^{5} ) / 2 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( \nu^{6} ) / 8 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{7} ) / 4 \) Copy content Toggle raw display
\(\beta_{8}\)\(=\) \( ( \nu^{8} ) / 16 \) Copy content Toggle raw display
\(\beta_{9}\)\(=\) \( ( \nu^{9} ) / 8 \) Copy content Toggle raw display
\(\beta_{10}\)\(=\) \( ( \nu^{10} ) / 32 \) Copy content Toggle raw display
\(\beta_{11}\)\(=\) \( ( \nu^{11} ) / 16 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( 2\beta_{2} \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{3} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( 4\beta_{4} \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( 2\beta_{5} \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 8\beta_{6} \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( 4\beta_{7} \) Copy content Toggle raw display
\(\nu^{8}\)\(=\) \( 16\beta_{8} \) Copy content Toggle raw display
\(\nu^{9}\)\(=\) \( 8\beta_{9} \) Copy content Toggle raw display
\(\nu^{10}\)\(=\) \( 32\beta_{10} \) Copy content Toggle raw display
\(\nu^{11}\)\(=\) \( 16\beta_{11} \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/216\mathbb{Z}\right)^\times\).

\(n\) \(55\) \(109\) \(137\)
\(\chi(n)\) \(-1\) \(-1\) \(\beta_{4}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
43.1
−0.483690 + 1.32893i
0.483690 1.32893i
−0.909039 + 1.08335i
0.909039 1.08335i
−1.39273 + 0.245576i
1.39273 0.245576i
−1.39273 0.245576i
1.39273 + 0.245576i
−0.909039 1.08335i
0.909039 + 1.08335i
−0.483690 1.32893i
0.483690 + 1.32893i
−1.53209 1.28558i −0.0276864 2.99987i 0.694593 + 3.93923i 0 −3.81414 + 4.63166i 0 4.00000 6.92820i −8.99847 + 0.166112i 0
43.2 −1.53209 1.28558i 1.90707 + 2.31583i 0.694593 + 3.93923i 0 0.0553729 5.99974i 0 4.00000 6.92820i −1.72616 + 8.83292i 0
67.1 −0.347296 1.96962i −2.58412 1.52391i −3.75877 + 1.36808i 0 −2.10407 + 5.61898i 0 4.00000 + 6.92820i 4.35538 + 7.87596i 0
67.2 −0.347296 1.96962i 1.05203 + 2.80949i −3.75877 + 1.36808i 0 5.16824 3.04783i 0 4.00000 + 6.92820i −6.78645 + 5.91135i 0
115.1 1.87939 0.684040i −2.95911 + 0.493657i 3.06418 2.57115i 0 −5.22362 + 2.95192i 0 4.00000 6.92820i 8.51261 2.92156i 0
115.2 1.87939 0.684040i 2.61181 + 1.47596i 3.06418 2.57115i 0 5.91821 + 0.987313i 0 4.00000 6.92820i 4.64309 + 7.70985i 0
139.1 1.87939 + 0.684040i −2.95911 0.493657i 3.06418 + 2.57115i 0 −5.22362 2.95192i 0 4.00000 + 6.92820i 8.51261 + 2.92156i 0
139.2 1.87939 + 0.684040i 2.61181 1.47596i 3.06418 + 2.57115i 0 5.91821 0.987313i 0 4.00000 + 6.92820i 4.64309 7.70985i 0
187.1 −0.347296 + 1.96962i −2.58412 + 1.52391i −3.75877 1.36808i 0 −2.10407 5.61898i 0 4.00000 6.92820i 4.35538 7.87596i 0
187.2 −0.347296 + 1.96962i 1.05203 2.80949i −3.75877 1.36808i 0 5.16824 + 3.04783i 0 4.00000 6.92820i −6.78645 5.91135i 0
211.1 −1.53209 + 1.28558i −0.0276864 + 2.99987i 0.694593 3.93923i 0 −3.81414 4.63166i 0 4.00000 + 6.92820i −8.99847 0.166112i 0
211.2 −1.53209 + 1.28558i 1.90707 2.31583i 0.694593 3.93923i 0 0.0553729 + 5.99974i 0 4.00000 + 6.92820i −1.72616 8.83292i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 43.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
8.d odd 2 1 CM by \(\Q(\sqrt{-2}) \)
27.e even 9 1 inner
216.r odd 18 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 216.3.r.a 12
8.d odd 2 1 CM 216.3.r.a 12
27.e even 9 1 inner 216.3.r.a 12
216.r odd 18 1 inner 216.3.r.a 12
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
216.3.r.a 12 1.a even 1 1 trivial
216.3.r.a 12 8.d odd 2 1 CM
216.3.r.a 12 27.e even 9 1 inner
216.3.r.a 12 216.r odd 18 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5} \) acting on \(S_{3}^{\mathrm{new}}(216, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{6} - 8 T^{3} + 64)^{2} \) Copy content Toggle raw display
$3$ \( T^{12} + 46 T^{9} + \cdots + 531441 \) Copy content Toggle raw display
$5$ \( T^{12} \) Copy content Toggle raw display
$7$ \( T^{12} \) Copy content Toggle raw display
$11$ \( T^{12} + \cdots + 22970736721 \) Copy content Toggle raw display
$13$ \( T^{12} \) Copy content Toggle raw display
$17$ \( T^{12} + \cdots + 48\!\cdots\!61 \) Copy content Toggle raw display
$19$ \( T^{12} + \cdots + 18\!\cdots\!61 \) Copy content Toggle raw display
$23$ \( T^{12} \) Copy content Toggle raw display
$29$ \( T^{12} \) Copy content Toggle raw display
$31$ \( T^{12} \) Copy content Toggle raw display
$37$ \( T^{12} \) Copy content Toggle raw display
$41$ \( T^{12} + \cdots + 15\!\cdots\!81 \) Copy content Toggle raw display
$43$ \( T^{12} + \cdots + 17\!\cdots\!01 \) Copy content Toggle raw display
$47$ \( T^{12} \) Copy content Toggle raw display
$53$ \( T^{12} \) Copy content Toggle raw display
$59$ \( T^{12} + \cdots + 11\!\cdots\!81 \) Copy content Toggle raw display
$61$ \( T^{12} \) Copy content Toggle raw display
$67$ \( T^{12} + \cdots + 71\!\cdots\!61 \) Copy content Toggle raw display
$71$ \( T^{12} \) Copy content Toggle raw display
$73$ \( T^{12} + \cdots + 10\!\cdots\!21 \) Copy content Toggle raw display
$79$ \( T^{12} \) Copy content Toggle raw display
$83$ \( T^{12} + \cdots + 62\!\cdots\!29 \) Copy content Toggle raw display
$89$ \( (T^{4} - 146 T^{3} + \cdots + 5987809)^{3} \) Copy content Toggle raw display
$97$ \( T^{12} + \cdots + 67\!\cdots\!41 \) Copy content Toggle raw display
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