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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [2166,4,Mod(1,2166)] 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("2166.1"); S:= CuspForms(chi, 4); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(2166, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0])) N = Newforms(chi, 4, names="a")
 
Level: \( N \) \(=\) \( 2166 = 2 \cdot 3 \cdot 19^{2} \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 2166.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [2,-4,6,8,-15] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(5)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: yes
Analytic conductor: \(127.798137072\)
Analytic rank: \(1\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{313}) \)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - x - 78 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
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 \(\beta = \frac{1}{2}(1 + \sqrt{313})\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - 2 q^{2} + 3 q^{3} + 4 q^{4} + ( - \beta - 7) q^{5} - 6 q^{6} + (3 \beta + 3) q^{7} - 8 q^{8} + 9 q^{9} + (2 \beta + 14) q^{10} + (\beta - 5) q^{11} + 12 q^{12} + 24 q^{13} + ( - 6 \beta - 6) q^{14}+ \cdots + (9 \beta - 45) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 4 q^{2} + 6 q^{3} + 8 q^{4} - 15 q^{5} - 12 q^{6} + 9 q^{7} - 16 q^{8} + 18 q^{9} + 30 q^{10} - 9 q^{11} + 24 q^{12} + 48 q^{13} - 18 q^{14} - 45 q^{15} + 32 q^{16} + 111 q^{17} - 36 q^{18} - 60 q^{20}+ \cdots - 81 q^{99}+O(q^{100}) \) 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
9.34590
−8.34590
−2.00000 3.00000 4.00000 −16.3459 −6.00000 31.0377 −8.00000 9.00000 32.6918
1.2 −2.00000 3.00000 4.00000 1.34590 −6.00000 −22.0377 −8.00000 9.00000 −2.69181
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \( +1 \)
\(3\) \( -1 \)
\(19\) \( +1 \)

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 2166.4.a.m ✓ 2
19.b odd 2 1 2166.4.a.o yes 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
2166.4.a.m ✓ 2 1.a even 1 1 trivial
2166.4.a.o yes 2 19.b odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(2166))\):

\( T_{5}^{2} + 15T_{5} - 22 \) Copy content Toggle raw display
\( T_{13} - 24 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T + 2)^{2} \) Copy content Toggle raw display
$3$ \( (T - 3)^{2} \) Copy content Toggle raw display
$5$ \( T^{2} + 15T - 22 \) Copy content Toggle raw display
$7$ \( T^{2} - 9T - 684 \) Copy content Toggle raw display
$11$ \( T^{2} + 9T - 58 \) Copy content Toggle raw display
$13$ \( (T - 24)^{2} \) Copy content Toggle raw display
$17$ \( T^{2} - 111T - 754 \) Copy content Toggle raw display
$19$ \( T^{2} \) Copy content Toggle raw display
$23$ \( T^{2} + 138T - 3064 \) Copy content Toggle raw display
$29$ \( T^{2} + 390T + 35208 \) Copy content Toggle raw display
$31$ \( T^{2} - 192T - 35856 \) Copy content Toggle raw display
$37$ \( (T + 84)^{2} \) Copy content Toggle raw display
$41$ \( T^{2} + 198T + 6984 \) Copy content Toggle raw display
$43$ \( T^{2} + 167T - 151484 \) Copy content Toggle raw display
$47$ \( T^{2} - 93T - 142522 \) Copy content Toggle raw display
$53$ \( T^{2} - 162T - 63864 \) Copy content Toggle raw display
$59$ \( T^{2} + 108T - 278784 \) Copy content Toggle raw display
$61$ \( T^{2} - 213T - 147114 \) Copy content Toggle raw display
$67$ \( T^{2} + 204T - 91008 \) Copy content Toggle raw display
$71$ \( T^{2} - 1752 T + 722304 \) Copy content Toggle raw display
$73$ \( T^{2} + 1417 T + 495634 \) Copy content Toggle raw display
$79$ \( T^{2} + 1092 T - 254016 \) Copy content Toggle raw display
$83$ \( T^{2} + 270T - 410272 \) Copy content Toggle raw display
$89$ \( T^{2} + 606T - 384264 \) Copy content Toggle raw display
$97$ \( T^{2} - 612T - 458496 \) Copy content Toggle raw display
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