Properties

Label 79.3.b.a
Level $79$
Weight $3$
Character orbit 79.b
Self dual yes
Analytic conductor $2.153$
Analytic rank $0$
Dimension $5$
CM discriminant -79
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [79,3,Mod(78,79)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(79, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1]))
 
N = Newforms(chi, 3, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("79.78");
 
S:= CuspForms(chi, 3);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 79 \)
Weight: \( k \) \(=\) \( 3 \)
Character orbit: \([\chi]\) \(=\) 79.b (of order \(2\), degree \(1\), minimal)

Newform invariants

comment: select newform
 
sage: f = N[0] # Warning: the index may be different
 
gp: f = lf[1] \\ Warning: the index may be different
 
Self dual: yes
Analytic conductor: \(2.15259408845\)
Analytic rank: \(0\)
Dimension: \(5\)
Coefficient field: 5.5.19503125.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{5} - 10x^{3} + 20x - 7 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{2}]$

$q$-expansion

comment: q-expansion
 
sage: f.q_expansion() # note that sage often uses an isomorphic number field
 
gp: mfcoefs(f, 20)
 

Coefficients of the \(q\)-expansion are expressed in terms of a basis \(1,\beta_1,\beta_2,\beta_3,\beta_4\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \beta_{2} q^{2} + (\beta_{4} + 2 \beta_1 + 4) q^{4} + ( - \beta_{4} - 3 \beta_1) q^{5} + ( - 2 \beta_{4} + 4 \beta_{2} + 3 \beta_1) q^{8} + 9 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{2} q^{2} + (\beta_{4} + 2 \beta_1 + 4) q^{4} + ( - \beta_{4} - 3 \beta_1) q^{5} + ( - 2 \beta_{4} + 4 \beta_{2} + 3 \beta_1) q^{8} + 9 q^{9} + (2 \beta_{4} - \beta_{3} + \cdots - 5 \beta_1) q^{10}+ \cdots + (27 \beta_{3} - 36 \beta_{2}) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 5 q + 20 q^{4} + 45 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 5 q + 20 q^{4} + 45 q^{9} + 80 q^{16} - 195 q^{20} - 175 q^{22} + 125 q^{25} - 135 q^{26} - 75 q^{32} + 180 q^{36} + 5 q^{40} + 245 q^{49} + 105 q^{50} + 225 q^{62} + 320 q^{64} + 365 q^{76} - 395 q^{79} - 780 q^{80} + 405 q^{81} - 750 q^{83} - 700 q^{88} + 525 q^{92} - 630 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{5} - 10x^{3} + 20x - 7 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - 4 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{3} - \nu^{2} - 6\nu + 4 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( \nu^{4} - 8\nu^{2} - 2\nu + 8 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} + 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{3} + \beta_{2} + 6\beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{4} + 8\beta_{2} + 2\beta _1 + 24 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/79\mathbb{Z}\right)^\times\).

\(n\) \(3\)
\(\chi(n)\) \(-1\)

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.

comment: embeddings in the coefficient field
 
gp: mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
78.1
0.376256
1.34333
−1.95213
−2.54982
2.78236
−3.85843 0 10.8875 −7.26375 0 0 −26.5749 9.00000 28.0267
78.2 −2.19545 0 0.820009 1.83666 0 0 6.98152 9.00000 −4.03229
78.3 −0.189190 0 −3.96421 9.91634 0 0 1.50675 9.00000 −1.87607
78.4 2.50157 0 2.25784 4.29198 0 0 −4.35813 9.00000 10.7367
78.5 3.74151 0 9.99886 −8.78122 0 0 22.4448 9.00000 −32.8550
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 78.5
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
79.b odd 2 1 CM by \(\Q(\sqrt{-79}) \)

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 79.3.b.a 5
3.b odd 2 1 711.3.d.a 5
4.b odd 2 1 1264.3.e.a 5
79.b odd 2 1 CM 79.3.b.a 5
237.b even 2 1 711.3.d.a 5
316.d even 2 1 1264.3.e.a 5
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
79.3.b.a 5 1.a even 1 1 trivial
79.3.b.a 5 79.b odd 2 1 CM
711.3.d.a 5 3.b odd 2 1
711.3.d.a 5 237.b even 2 1
1264.3.e.a 5 4.b odd 2 1
1264.3.e.a 5 316.d even 2 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2}^{5} - 20T_{2}^{3} + 80T_{2} + 15 \) acting on \(S_{3}^{\mathrm{new}}(79, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{5} - 20 T^{3} + \cdots + 15 \) Copy content Toggle raw display
$3$ \( T^{5} \) Copy content Toggle raw display
$5$ \( T^{5} - 125 T^{3} + \cdots - 4986 \) Copy content Toggle raw display
$7$ \( T^{5} \) Copy content Toggle raw display
$11$ \( T^{5} - 605 T^{3} + \cdots + 110502 \) Copy content Toggle raw display
$13$ \( T^{5} - 845 T^{3} + \cdots - 731210 \) Copy content Toggle raw display
$17$ \( T^{5} \) Copy content Toggle raw display
$19$ \( T^{5} - 1805 T^{3} + \cdots + 806902 \) Copy content Toggle raw display
$23$ \( T^{5} - 2645 T^{3} + \cdots + 7035630 \) Copy content Toggle raw display
$29$ \( T^{5} \) Copy content Toggle raw display
$31$ \( T^{5} - 4805 T^{3} + \cdots - 2835202 \) Copy content Toggle raw display
$37$ \( T^{5} \) Copy content Toggle raw display
$41$ \( T^{5} \) Copy content Toggle raw display
$43$ \( T^{5} \) Copy content Toggle raw display
$47$ \( T^{5} \) Copy content Toggle raw display
$53$ \( T^{5} \) Copy content Toggle raw display
$59$ \( T^{5} \) Copy content Toggle raw display
$61$ \( T^{5} \) Copy content Toggle raw display
$67$ \( T^{5} + \cdots - 2280156970 \) Copy content Toggle raw display
$71$ \( T^{5} \) Copy content Toggle raw display
$73$ \( T^{5} + \cdots - 4143230930 \) Copy content Toggle raw display
$79$ \( (T + 79)^{5} \) Copy content Toggle raw display
$83$ \( (T + 150)^{5} \) Copy content Toggle raw display
$89$ \( T^{5} + \cdots - 6410928498 \) Copy content Toggle raw display
$97$ \( T^{5} + \cdots + 13372478270 \) Copy content Toggle raw display
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