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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [138,4,Mod(1,138)] 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("138.1"); S:= CuspForms(chi, 4); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(138, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0])) N = Newforms(chi, 4, names="a")
 
Level: \( N \) \(=\) \( 138 = 2 \cdot 3 \cdot 23 \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 138.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [3,6,9] 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: yes
Analytic conductor: \(8.14226358079\)
Analytic rank: \(0\)
Dimension: \(3\)
Coefficient field: 3.3.16372.1
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{3} - 40x - 84 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{2} \)
Twist minimal: yes
Fricke sign: \(+1\)
Sato-Tate group: $\mathrm{SU}(2)$

$q$-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 \(1,\beta_1,\beta_2\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + 2 q^{2} + 3 q^{3} + 4 q^{4} + (\beta_{2} + 7) q^{5} + 6 q^{6} + ( - \beta_{2} + \beta_1 + 3) q^{7} + 8 q^{8} + 9 q^{9} + (2 \beta_{2} + 14) q^{10} + ( - 2 \beta_{2} - 5 \beta_1 + 6) q^{11} + 12 q^{12}+ \cdots + ( - 18 \beta_{2} - 45 \beta_1 + 54) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 3 q + 6 q^{2} + 9 q^{3} + 12 q^{4} + 20 q^{5} + 18 q^{6} + 10 q^{7} + 24 q^{8} + 27 q^{9} + 40 q^{10} + 20 q^{11} + 36 q^{12} - 2 q^{13} + 20 q^{14} + 60 q^{15} + 48 q^{16} + 32 q^{17} + 54 q^{18} - 26 q^{19}+ \cdots + 180 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{3} - 40x - 84 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( 2\nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - 4\nu - 27 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} + 2\beta _1 + 27 \) Copy content Toggle raw display

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1.1
−2.48246
7.18917
−4.70671
2.00000 3.00000 4.00000 −3.90754 6.00000 8.94262 8.00000 9.00000 −7.81508
1.2 2.00000 3.00000 4.00000 2.92753 6.00000 21.4508 8.00000 9.00000 5.85507
1.3 2.00000 3.00000 4.00000 20.9800 6.00000 −20.3934 8.00000 9.00000 41.9600
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \( -1 \)
\(3\) \( -1 \)
\(23\) \( +1 \)

Inner twists

This newform does not admit any (nontrivial) inner twists.

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 138.4.a.f ✓ 3
3.b odd 2 1 414.4.a.l 3
4.b odd 2 1 1104.4.a.r 3
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
138.4.a.f ✓ 3 1.a even 1 1 trivial
414.4.a.l 3 3.b odd 2 1
1104.4.a.r 3 4.b odd 2 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{3} - 20T_{5}^{2} - 32T_{5} + 240 \) acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(138))\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T - 2)^{3} \) Copy content Toggle raw display
$3$ \( (T - 3)^{3} \) Copy content Toggle raw display
$5$ \( T^{3} - 20 T^{2} + \cdots + 240 \) Copy content Toggle raw display
$7$ \( T^{3} - 10 T^{2} + \cdots + 3912 \) Copy content Toggle raw display
$11$ \( T^{3} - 20 T^{2} + \cdots + 76320 \) Copy content Toggle raw display
$13$ \( T^{3} + 2 T^{2} + \cdots + 34456 \) Copy content Toggle raw display
$17$ \( T^{3} - 32 T^{2} + \cdots + 321648 \) Copy content Toggle raw display
$19$ \( T^{3} + 26 T^{2} + \cdots + 124552 \) Copy content Toggle raw display
$23$ \( (T + 23)^{3} \) Copy content Toggle raw display
$29$ \( T^{3} + 50 T^{2} + \cdots + 2646168 \) Copy content Toggle raw display
$31$ \( T^{3} - 12 T^{2} + \cdots + 4079040 \) Copy content Toggle raw display
$37$ \( T^{3} + 90 T^{2} + \cdots - 235496 \) Copy content Toggle raw display
$41$ \( T^{3} + 466 T^{2} + \cdots - 66217896 \) Copy content Toggle raw display
$43$ \( T^{3} + 274 T^{2} + \cdots - 25943800 \) Copy content Toggle raw display
$47$ \( T^{3} + 680 T^{2} + \cdots - 574848 \) Copy content Toggle raw display
$53$ \( T^{3} + 408 T^{2} + \cdots - 117418800 \) Copy content Toggle raw display
$59$ \( T^{3} + 1244 T^{2} + \cdots + 7860672 \) Copy content Toggle raw display
$61$ \( T^{3} + 130 T^{2} + \cdots + 87594872 \) Copy content Toggle raw display
$67$ \( T^{3} - 450 T^{2} + \cdots + 15728056 \) Copy content Toggle raw display
$71$ \( T^{3} + 1512 T^{2} + \cdots + 125266176 \) Copy content Toggle raw display
$73$ \( T^{3} - 710 T^{2} + \cdots + 12034296 \) Copy content Toggle raw display
$79$ \( T^{3} - 478 T^{2} + \cdots + 175419096 \) Copy content Toggle raw display
$83$ \( T^{3} + 1092 T^{2} + \cdots - 152516256 \) Copy content Toggle raw display
$89$ \( T^{3} + 372 T^{2} + \cdots - 139730832 \) Copy content Toggle raw display
$97$ \( T^{3} - 2106 T^{2} + \cdots - 304805880 \) Copy content Toggle raw display
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