Properties

Label 920.2.e.a
Level $920$
Weight $2$
Character orbit 920.e
Analytic conductor $7.346$
Analytic rank $0$
Dimension $2$
Inner twists $2$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [920,2,Mod(369,920)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(920, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 1, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("920.369");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 920 = 2^{3} \cdot 5 \cdot 23 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 920.e (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: no
Analytic conductor: \(7.34623698596\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{-1}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-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 \(i = \sqrt{-1}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + 2 i q^{3} + ( - i + 2) q^{5} - 3 i q^{7} - q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q + 2 i q^{3} + ( - i + 2) q^{5} - 3 i q^{7} - q^{9} + 6 i q^{13} + (4 i + 2) q^{15} - 7 i q^{17} + 4 q^{19} + 6 q^{21} + i q^{23} + ( - 4 i + 3) q^{25} + 4 i q^{27} + 9 q^{29} - 3 q^{31} + ( - 6 i - 3) q^{35} - 7 i q^{37} - 12 q^{39} + 9 q^{41} + 4 i q^{43} + (i - 2) q^{45} - 2 i q^{47} - 2 q^{49} + 14 q^{51} + 7 i q^{53} + 8 i q^{57} - 9 q^{59} - 2 q^{61} + 3 i q^{63} + (12 i + 6) q^{65} + 13 i q^{67} - 2 q^{69} - 13 q^{71} + 4 i q^{73} + (6 i + 8) q^{75} + 2 q^{79} - 11 q^{81} + 11 i q^{83} + ( - 14 i - 7) q^{85} + 18 i q^{87} + 10 q^{89} + 18 q^{91} - 6 i q^{93} + ( - 4 i + 8) q^{95} + 2 i q^{97} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q + 4 q^{5} - 2 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 2 q + 4 q^{5} - 2 q^{9} + 4 q^{15} + 8 q^{19} + 12 q^{21} + 6 q^{25} + 18 q^{29} - 6 q^{31} - 6 q^{35} - 24 q^{39} + 18 q^{41} - 4 q^{45} - 4 q^{49} + 28 q^{51} - 18 q^{59} - 4 q^{61} + 12 q^{65} - 4 q^{69} - 26 q^{71} + 16 q^{75} + 4 q^{79} - 22 q^{81} - 14 q^{85} + 20 q^{89} + 36 q^{91} + 16 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/920\mathbb{Z}\right)^\times\).

\(n\) \(231\) \(281\) \(461\) \(737\)
\(\chi(n)\) \(1\) \(1\) \(1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
369.1
1.00000i
1.00000i
0 2.00000i 0 2.00000 + 1.00000i 0 3.00000i 0 −1.00000 0
369.2 0 2.00000i 0 2.00000 1.00000i 0 3.00000i 0 −1.00000 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
5.b even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 920.2.e.a 2
4.b odd 2 1 1840.2.e.a 2
5.b even 2 1 inner 920.2.e.a 2
5.c odd 4 1 4600.2.a.b 1
5.c odd 4 1 4600.2.a.o 1
20.d odd 2 1 1840.2.e.a 2
20.e even 4 1 9200.2.a.d 1
20.e even 4 1 9200.2.a.bi 1
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
920.2.e.a 2 1.a even 1 1 trivial
920.2.e.a 2 5.b even 2 1 inner
1840.2.e.a 2 4.b odd 2 1
1840.2.e.a 2 20.d odd 2 1
4600.2.a.b 1 5.c odd 4 1
4600.2.a.o 1 5.c odd 4 1
9200.2.a.d 1 20.e even 4 1
9200.2.a.bi 1 20.e even 4 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{2} + 4 \) acting on \(S_{2}^{\mathrm{new}}(920, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} \) Copy content Toggle raw display
$3$ \( T^{2} + 4 \) Copy content Toggle raw display
$5$ \( T^{2} - 4T + 5 \) Copy content Toggle raw display
$7$ \( T^{2} + 9 \) Copy content Toggle raw display
$11$ \( T^{2} \) Copy content Toggle raw display
$13$ \( T^{2} + 36 \) Copy content Toggle raw display
$17$ \( T^{2} + 49 \) Copy content Toggle raw display
$19$ \( (T - 4)^{2} \) Copy content Toggle raw display
$23$ \( T^{2} + 1 \) Copy content Toggle raw display
$29$ \( (T - 9)^{2} \) Copy content Toggle raw display
$31$ \( (T + 3)^{2} \) Copy content Toggle raw display
$37$ \( T^{2} + 49 \) Copy content Toggle raw display
$41$ \( (T - 9)^{2} \) Copy content Toggle raw display
$43$ \( T^{2} + 16 \) Copy content Toggle raw display
$47$ \( T^{2} + 4 \) Copy content Toggle raw display
$53$ \( T^{2} + 49 \) Copy content Toggle raw display
$59$ \( (T + 9)^{2} \) Copy content Toggle raw display
$61$ \( (T + 2)^{2} \) Copy content Toggle raw display
$67$ \( T^{2} + 169 \) Copy content Toggle raw display
$71$ \( (T + 13)^{2} \) Copy content Toggle raw display
$73$ \( T^{2} + 16 \) Copy content Toggle raw display
$79$ \( (T - 2)^{2} \) Copy content Toggle raw display
$83$ \( T^{2} + 121 \) Copy content Toggle raw display
$89$ \( (T - 10)^{2} \) Copy content Toggle raw display
$97$ \( T^{2} + 4 \) Copy content Toggle raw display
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