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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [196,8,Mod(1,196)] 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("196.1"); S:= CuspForms(chi, 8); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(196, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0])) N = Newforms(chi, 8, names="a")
 
Level: \( N \) \(=\) \( 196 = 2^{2} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 8 \)
Character orbit: \([\chi]\) \(=\) 196.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [4,0,0] 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: \(61.2274649949\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\mathbb{Q}[x]/(x^{4} - \cdots)\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - 1162x^{2} + 318096 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 2^{7}\cdot 7^{2} \)
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 \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \beta_1 q^{3} + \beta_{2} q^{5} + ( - \beta_{3} + 1769) q^{9} + ( - \beta_{3} + 1824) q^{11} + ( - 13 \beta_{2} + 76 \beta_1) q^{13} + (\beta_{3} - 1460) q^{15} + (78 \beta_{2} - 168 \beta_1) q^{17}+ \cdots + ( - 3593 \beta_{3} + 18487216) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 7076 q^{9} + 7296 q^{11} - 5840 q^{15} - 117840 q^{23} - 63460 q^{25} + 200232 q^{29} + 430440 q^{37} + 1278544 q^{39} + 180640 q^{43} - 3113952 q^{51} + 2090520 q^{53} + 6698800 q^{57} - 3681360 q^{65}+ \cdots + 73948864 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} - 1162x^{2} + 318096 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( -2\nu^{3} + 1478\nu ) / 141 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 8\nu^{3} - 3938\nu ) / 141 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( 28\nu^{2} - 16268 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{2} + 4\beta_1 ) / 14 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{3} + 16268 ) / 28 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 739\beta_{2} + 1969\beta_1 ) / 14 \) 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
−21.0115
−26.8424
26.8424
21.0115
0 −88.6706 0 60.5215 0 0 0 5675.48 0
1.2 0 −7.03728 0 −347.645 0 0 0 −2137.48 0
1.3 0 7.03728 0 347.645 0 0 0 −2137.48 0
1.4 0 88.6706 0 −60.5215 0 0 0 5675.48 0
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \( -1 \)
\(7\) \( -1 \)

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
7.b odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 196.8.a.c ✓ 4
7.b odd 2 1 inner 196.8.a.c ✓ 4
7.c even 3 2 196.8.e.e 8
7.d odd 6 2 196.8.e.e 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
196.8.a.c ✓ 4 1.a even 1 1 trivial
196.8.a.c ✓ 4 7.b odd 2 1 inner
196.8.e.e 8 7.c even 3 2
196.8.e.e 8 7.d odd 6 2

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{4} - 7912T_{3}^{2} + 389376 \) acting on \(S_{8}^{\mathrm{new}}(\Gamma_0(196))\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( T^{4} - 7912 T^{2} + 389376 \) Copy content Toggle raw display
$5$ \( T^{4} - 124520 T^{2} + 442681600 \) Copy content Toggle raw display
$7$ \( T^{4} \) Copy content Toggle raw display
$11$ \( (T^{2} - 3648 T - 11933584)^{2} \) Copy content Toggle raw display
$13$ \( T^{4} + \cdots + 899204335933696 \) Copy content Toggle raw display
$17$ \( T^{4} + \cdots + 25\!\cdots\!56 \) Copy content Toggle raw display
$19$ \( T^{4} + \cdots + 30\!\cdots\!00 \) Copy content Toggle raw display
$23$ \( (T^{2} + 58920 T - 2565734400)^{2} \) Copy content Toggle raw display
$29$ \( (T^{2} - 100116 T - 1400899996)^{2} \) Copy content Toggle raw display
$31$ \( T^{4} + \cdots + 20\!\cdots\!00 \) Copy content Toggle raw display
$37$ \( (T^{2} - 215220 T - 112030623900)^{2} \) Copy content Toggle raw display
$41$ \( T^{4} + \cdots + 10\!\cdots\!00 \) Copy content Toggle raw display
$43$ \( (T^{2} - 90320 T - 166208248400)^{2} \) Copy content Toggle raw display
$47$ \( T^{4} + \cdots + 26\!\cdots\!96 \) Copy content Toggle raw display
$53$ \( (T^{2} - 1045260 T - 534141507100)^{2} \) Copy content Toggle raw display
$59$ \( T^{4} + \cdots + 33\!\cdots\!00 \) Copy content Toggle raw display
$61$ \( T^{4} + \cdots + 27\!\cdots\!00 \) Copy content Toggle raw display
$67$ \( (T^{2} + \cdots + 9306143719600)^{2} \) Copy content Toggle raw display
$71$ \( (T^{2} + \cdots + 5168396140544)^{2} \) Copy content Toggle raw display
$73$ \( T^{4} + \cdots + 11\!\cdots\!00 \) Copy content Toggle raw display
$79$ \( (T^{2} + \cdots - 14786225395136)^{2} \) Copy content Toggle raw display
$83$ \( T^{4} + \cdots + 18\!\cdots\!00 \) Copy content Toggle raw display
$89$ \( T^{4} + \cdots + 18\!\cdots\!00 \) Copy content Toggle raw display
$97$ \( T^{4} + \cdots + 36\!\cdots\!76 \) Copy content Toggle raw display
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