Properties

Label 930.2.bg.a
Level $930$
Weight $2$
Character orbit 930.bg
Analytic conductor $7.426$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $2$

Related objects

Downloads

Learn more

Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [930,2,Mod(121,930)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(930, base_ring=CyclotomicField(30))
 
chi = DirichletCharacter(H, H._module([0, 0, 16]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("930.121");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 930 = 2 \cdot 3 \cdot 5 \cdot 31 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 930.bg (of order \(15\), degree \(8\), 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: no
Analytic conductor: \(7.42608738798\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: \(\Q(\zeta_{15})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{7} + x^{5} - x^{4} + x^{3} - x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{15}]$

$q$-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 primitive root of unity \(\zeta_{15}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \zeta_{15}^{3} q^{2} - \zeta_{15}^{7} q^{3} + \zeta_{15}^{6} q^{4} - \zeta_{15}^{5} q^{5} + (\zeta_{15}^{5} + 1) q^{6} + ( - 4 \zeta_{15}^{7} + 2 \zeta_{15}^{6} + \cdots + 4) q^{7} + \cdots + ( - \zeta_{15}^{7} + \zeta_{15}^{6} + \cdots + 1) q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q + \zeta_{15}^{3} q^{2} - \zeta_{15}^{7} q^{3} + \zeta_{15}^{6} q^{4} - \zeta_{15}^{5} q^{5} + (\zeta_{15}^{5} + 1) q^{6} + ( - 4 \zeta_{15}^{7} + 2 \zeta_{15}^{6} + \cdots + 4) q^{7} + \cdots + (3 \zeta_{15}^{7} - 6 \zeta_{15}^{6} + \cdots - 5) q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 2 q^{2} - q^{3} - 2 q^{4} + 4 q^{5} + 4 q^{6} + 2 q^{7} - 2 q^{8} + q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 2 q^{2} - q^{3} - 2 q^{4} + 4 q^{5} + 4 q^{6} + 2 q^{7} - 2 q^{8} + q^{9} - q^{10} - 23 q^{11} - q^{12} - 17 q^{13} + 2 q^{14} - 2 q^{15} - 2 q^{16} + 11 q^{17} + q^{18} - q^{20} + 18 q^{21} + 22 q^{22} - 2 q^{23} - q^{24} - 4 q^{25} - 2 q^{26} + 2 q^{27} - 18 q^{28} + 10 q^{29} + 8 q^{30} + 14 q^{31} + 8 q^{32} + 4 q^{33} - 19 q^{34} + 4 q^{35} - 4 q^{36} - q^{37} + 20 q^{38} + 6 q^{39} - q^{40} - 42 q^{41} - 2 q^{42} - 23 q^{43} + 17 q^{44} - q^{45} + 3 q^{46} + 11 q^{47} - q^{48} - 3 q^{49} + q^{50} - 11 q^{51} + 13 q^{52} + 2 q^{53} + 2 q^{54} - 22 q^{55} + 2 q^{56} + 10 q^{57} + 28 q^{59} - 2 q^{60} - 4 q^{61} + 14 q^{62} - 4 q^{63} - 2 q^{64} - 13 q^{65} - q^{66} - 20 q^{67} + q^{68} - q^{69} + 4 q^{70} + 42 q^{71} + q^{72} + 4 q^{73} - 41 q^{74} - q^{75} - 10 q^{76} + 52 q^{77} - 4 q^{78} - 42 q^{79} - q^{80} + q^{81} - 2 q^{82} + 6 q^{83} - 2 q^{84} + 22 q^{85} - 3 q^{86} - 10 q^{87} - 3 q^{88} + 16 q^{89} - q^{90} + 28 q^{91} - 2 q^{92} + 13 q^{93} + 6 q^{94} - q^{96} + 44 q^{97} - 8 q^{98} - 3 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/930\mathbb{Z}\right)^\times\).

\(n\) \(187\) \(311\) \(871\)
\(\chi(n)\) \(1\) \(1\) \(1 - \zeta_{15}^{2} + \zeta_{15}^{3} - \zeta_{15}^{4} + \zeta_{15}^{6} - \zeta_{15}^{7}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
121.1
−0.978148 + 0.207912i
−0.104528 0.994522i
0.669131 0.743145i
0.669131 + 0.743145i
−0.104528 + 0.994522i
−0.978148 0.207912i
0.913545 0.406737i
0.913545 + 0.406737i
−0.809017 + 0.587785i 0.104528 0.994522i 0.309017 0.951057i 0.500000 0.866025i 0.500000 + 0.866025i −0.408977 + 0.0869308i 0.309017 + 0.951057i −0.978148 0.207912i 0.104528 + 0.994522i
361.1 0.309017 + 0.951057i −0.669131 0.743145i −0.809017 + 0.587785i 0.500000 + 0.866025i 0.500000 0.866025i 0.279773 + 2.66186i −0.809017 0.587785i −0.104528 + 0.994522i −0.669131 + 0.743145i
391.1 −0.809017 0.587785i −0.913545 0.406737i 0.309017 + 0.951057i 0.500000 0.866025i 0.500000 + 0.866025i −2.44512 + 2.71559i 0.309017 0.951057i 0.669131 + 0.743145i −0.913545 + 0.406737i
421.1 −0.809017 + 0.587785i −0.913545 + 0.406737i 0.309017 0.951057i 0.500000 + 0.866025i 0.500000 0.866025i −2.44512 2.71559i 0.309017 + 0.951057i 0.669131 0.743145i −0.913545 0.406737i
541.1 0.309017 0.951057i −0.669131 + 0.743145i −0.809017 0.587785i 0.500000 0.866025i 0.500000 + 0.866025i 0.279773 2.66186i −0.809017 + 0.587785i −0.104528 0.994522i −0.669131 0.743145i
661.1 −0.809017 0.587785i 0.104528 + 0.994522i 0.309017 + 0.951057i 0.500000 + 0.866025i 0.500000 0.866025i −0.408977 0.0869308i 0.309017 0.951057i −0.978148 + 0.207912i 0.104528 0.994522i
691.1 0.309017 0.951057i 0.978148 + 0.207912i −0.809017 0.587785i 0.500000 + 0.866025i 0.500000 0.866025i 3.57433 1.59139i −0.809017 + 0.587785i 0.913545 + 0.406737i 0.978148 0.207912i
751.1 0.309017 + 0.951057i 0.978148 0.207912i −0.809017 + 0.587785i 0.500000 0.866025i 0.500000 + 0.866025i 3.57433 + 1.59139i −0.809017 0.587785i 0.913545 0.406737i 0.978148 + 0.207912i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 121.1
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
31.g even 15 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 930.2.bg.a 8
31.g even 15 1 inner 930.2.bg.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
930.2.bg.a 8 1.a even 1 1 trivial
930.2.bg.a 8 31.g even 15 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{7}^{8} - 2T_{7}^{7} - 32T_{7}^{5} + 144T_{7}^{4} - 128T_{7}^{3} + 1280T_{7}^{2} + 1152T_{7} + 256 \) acting on \(S_{2}^{\mathrm{new}}(930, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} + T^{3} + T^{2} + \cdots + 1)^{2} \) Copy content Toggle raw display
$3$ \( T^{8} + T^{7} - T^{5} + \cdots + 1 \) Copy content Toggle raw display
$5$ \( (T^{2} - T + 1)^{4} \) Copy content Toggle raw display
$7$ \( T^{8} - 2 T^{7} + \cdots + 256 \) Copy content Toggle raw display
$11$ \( T^{8} + 23 T^{7} + \cdots + 73441 \) Copy content Toggle raw display
$13$ \( T^{8} + 17 T^{7} + \cdots + 841 \) Copy content Toggle raw display
$17$ \( T^{8} - 11 T^{7} + \cdots + 292681 \) Copy content Toggle raw display
$19$ \( T^{8} + 20 T^{6} + \cdots + 6400 \) Copy content Toggle raw display
$23$ \( T^{8} + 2 T^{7} + \cdots + 1 \) Copy content Toggle raw display
$29$ \( T^{8} - 10 T^{7} + \cdots + 25 \) Copy content Toggle raw display
$31$ \( T^{8} - 14 T^{7} + \cdots + 923521 \) Copy content Toggle raw display
$37$ \( T^{8} + T^{7} + \cdots + 961 \) Copy content Toggle raw display
$41$ \( T^{8} + 42 T^{7} + \cdots + 11397376 \) Copy content Toggle raw display
$43$ \( T^{8} + 23 T^{7} + \cdots + 3481 \) Copy content Toggle raw display
$47$ \( T^{8} - 11 T^{7} + \cdots + 292681 \) Copy content Toggle raw display
$53$ \( T^{8} - 2 T^{7} + \cdots + 246016 \) Copy content Toggle raw display
$59$ \( T^{8} - 28 T^{7} + \cdots + 436921 \) Copy content Toggle raw display
$61$ \( (T^{4} + 2 T^{3} + \cdots + 5296)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} + 20 T^{7} + \cdots + 89397025 \) Copy content Toggle raw display
$71$ \( T^{8} - 42 T^{7} + \cdots + 19927296 \) Copy content Toggle raw display
$73$ \( T^{8} - 4 T^{7} + \cdots + 256 \) Copy content Toggle raw display
$79$ \( T^{8} + 42 T^{7} + \cdots + 6046681 \) Copy content Toggle raw display
$83$ \( T^{8} - 6 T^{7} + \cdots + 256 \) Copy content Toggle raw display
$89$ \( T^{8} - 16 T^{7} + \cdots + 18524416 \) Copy content Toggle raw display
$97$ \( (T^{4} - 22 T^{3} + \cdots + 16)^{2} \) Copy content Toggle raw display
show more
show less