Properties

Label 83.5.b.a
Level $83$
Weight $5$
Character orbit 83.b
Self dual yes
Analytic conductor $8.580$
Analytic rank $0$
Dimension $3$
CM discriminant -83
Inner twists $2$

Related objects

Downloads

Learn more

Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [83,5,Mod(82,83)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(83, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1]))
 
N = Newforms(chi, 5, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("83.82");
 
S:= CuspForms(chi, 5);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 83 \)
Weight: \( k \) \(=\) \( 5 \)
Character orbit: \([\chi]\) \(=\) 83.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: \(8.57970693596\)
Analytic rank: \(0\)
Dimension: \(3\)
Coefficient field: 3.3.2241.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{3} - 9x - 5 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
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 \(1,\beta_1,\beta_2\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + ( - 3 \beta_{2} + 2 \beta_1) q^{3} + 16 q^{4} + ( - 11 \beta_{2} + 21 \beta_1) q^{7} + ( - 2 \beta_{2} - 47 \beta_1 + 81) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - 3 \beta_{2} + 2 \beta_1) q^{3} + 16 q^{4} + ( - 11 \beta_{2} + 21 \beta_1) q^{7} + ( - 2 \beta_{2} - 47 \beta_1 + 81) q^{9} + (46 \beta_{2} + 9 \beta_1) q^{11} + ( - 48 \beta_{2} + 32 \beta_1) q^{12} + 256 q^{16} + (109 \beta_{2} - 3 \beta_1) q^{17} + (61 \beta_{2} - 227 \beta_1 + 799) q^{21} + 311 q^{23} + 625 q^{25} + ( - 243 \beta_{2} + 162 \beta_1 - 617) q^{27} + ( - 176 \beta_{2} + 336 \beta_1) q^{28} + ( - 299 \beta_{2} - 222 \beta_1) q^{29} + (286 \beta_{2} + 393 \beta_1) q^{31} + (229 \beta_{2} + 562 \beta_1 - 1889) q^{33} + ( - 32 \beta_{2} - 752 \beta_1 + 1296) q^{36} + ( - 146 \beta_{2} - 783 \beta_1) q^{37} - 3361 q^{41} + (736 \beta_{2} + 144 \beta_1) q^{44} + ( - 768 \beta_{2} + 512 \beta_1) q^{48} + (661 \beta_{2} - 846 \beta_1 + 2401) q^{49} + (421 \beta_{2} + 1429 \beta_1 - 4841) q^{51} + ( - 827 \beta_{2} - 1707 \beta_1) q^{59} + (1093 \beta_{2} - 1182 \beta_1) q^{61} + ( - 2397 \beta_{2} + 1598 \beta_1 - 6089) q^{63} + 4096 q^{64} + (1744 \beta_{2} - 48 \beta_1) q^{68} + ( - 933 \beta_{2} + 622 \beta_1) q^{69} + ( - 1875 \beta_{2} + 1250 \beta_1) q^{75} + (334 \beta_{2} + 3441 \beta_1 - 6817) q^{77} + (1851 \beta_{2} - 1234 \beta_1 + 6561) q^{81} + 6889 q^{83} + (976 \beta_{2} - 3632 \beta_1 + 12784) q^{84} + ( - 2306 \beta_{2} - 2999 \beta_1 + 9826) q^{87} + 4976 q^{92} + (3109 \beta_{2} + 2146 \beta_1 - 6689) q^{93} + (5667 \beta_{2} - 3778 \beta_1 - 1646) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 3 q + 48 q^{4} + 243 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 3 q + 48 q^{4} + 243 q^{9} + 768 q^{16} + 2397 q^{21} + 933 q^{23} + 1875 q^{25} - 1851 q^{27} - 5667 q^{33} + 3888 q^{36} - 10083 q^{41} + 7203 q^{49} - 14523 q^{51} - 18267 q^{63} + 12288 q^{64} - 20451 q^{77} + 19683 q^{81} + 20667 q^{83} + 38352 q^{84} + 29478 q^{87} + 14928 q^{92} - 20067 q^{93} - 4938 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{3} - 9x - 5 \) : Copy content Toggle raw display

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

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/83\mathbb{Z}\right)^\times\).

\(n\) \(2\)
\(\chi(n)\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
82.1
−2.66966
3.24655
−0.576888
0 −16.7296 16.0000 0 0 −97.8274 0 198.881 0
82.2 0 2.61247 16.0000 0 0 53.9486 0 −74.1750 0
82.3 0 14.1172 16.0000 0 0 43.8788 0 118.294 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
83.b odd 2 1 CM by \(\Q(\sqrt{-83}) \)

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 83.5.b.a 3
83.b odd 2 1 CM 83.5.b.a 3
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
83.5.b.a 3 1.a even 1 1 trivial
83.5.b.a 3 83.b odd 2 1 CM

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2} \) acting on \(S_{5}^{\mathrm{new}}(83, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{3} \) Copy content Toggle raw display
$3$ \( T^{3} - 243T + 617 \) Copy content Toggle raw display
$5$ \( T^{3} \) Copy content Toggle raw display
$7$ \( T^{3} - 7203 T + 231577 \) Copy content Toggle raw display
$11$ \( T^{3} - 43923 T + 3198553 \) Copy content Toggle raw display
$13$ \( T^{3} \) Copy content Toggle raw display
$17$ \( T^{3} - 250563 T + 30626737 \) Copy content Toggle raw display
$19$ \( T^{3} \) Copy content Toggle raw display
$23$ \( (T - 311)^{3} \) Copy content Toggle raw display
$29$ \( T^{3} - 2121843 T - 991523567 \) Copy content Toggle raw display
$31$ \( T^{3} - 2770563 T + 101624713 \) Copy content Toggle raw display
$37$ \( T^{3} + \cdots + 5012228257 \) Copy content Toggle raw display
$41$ \( (T + 3361)^{3} \) Copy content Toggle raw display
$43$ \( T^{3} \) Copy content Toggle raw display
$47$ \( T^{3} \) Copy content Toggle raw display
$53$ \( T^{3} \) Copy content Toggle raw display
$59$ \( T^{3} + \cdots + 48671434393 \) Copy content Toggle raw display
$61$ \( T^{3} + \cdots - 86434023647 \) Copy content Toggle raw display
$67$ \( T^{3} \) Copy content Toggle raw display
$71$ \( T^{3} \) Copy content Toggle raw display
$73$ \( T^{3} \) Copy content Toggle raw display
$79$ \( T^{3} \) Copy content Toggle raw display
$83$ \( (T - 6889)^{3} \) Copy content Toggle raw display
$89$ \( T^{3} \) Copy content Toggle raw display
$97$ \( T^{3} \) Copy content Toggle raw display
show more
show less