Properties

Label 882.4.a.bi
Level $882$
Weight $4$
Character orbit 882.a
Self dual yes
Analytic conductor $52.040$
Analytic rank $0$
Dimension $2$
CM no
Inner twists $1$

Related objects

Downloads

Learn more

Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [882,4,Mod(1,882)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(882, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0]))
 
N = Newforms(chi, 4, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("882.1");
 
S:= CuspForms(chi, 4);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 882 = 2 \cdot 3^{2} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 882.a (trivial)

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: \(52.0396846251\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{2}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - 2 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 7 \)
Twist minimal: no (minimal twist has level 294)
Fricke sign: \(1\)
Sato-Tate group: $\mathrm{SU}(2)$

$q$-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 \(\beta = 7\sqrt{2}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + 2 q^{2} + 4 q^{4} + (\beta + 6) q^{5} + 8 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + 2 q^{2} + 4 q^{4} + (\beta + 6) q^{5} + 8 q^{8} + (2 \beta + 12) q^{10} + ( - 6 \beta + 2) q^{11} + (3 \beta - 24) q^{13} + 16 q^{16} + (\beta + 42) q^{17} + ( - 2 \beta + 36) q^{19} + (4 \beta + 24) q^{20} + ( - 12 \beta + 4) q^{22} + (6 \beta + 154) q^{23} + (12 \beta + 9) q^{25} + (6 \beta - 48) q^{26} + (18 \beta + 40) q^{29} + ( - 6 \beta - 192) q^{31} + 32 q^{32} + (2 \beta + 84) q^{34} + (12 \beta + 268) q^{37} + ( - 4 \beta + 72) q^{38} + (8 \beta + 48) q^{40} + ( - 5 \beta + 378) q^{41} + ( - 24 \beta + 200) q^{43} + ( - 24 \beta + 8) q^{44} + (12 \beta + 308) q^{46} + (10 \beta + 156) q^{47} + (24 \beta + 18) q^{50} + (12 \beta - 96) q^{52} + ( - 24 \beta + 26) q^{53} + ( - 34 \beta - 576) q^{55} + (36 \beta + 80) q^{58} + ( - 2 \beta + 432) q^{59} + ( - 13 \beta - 708) q^{61} + ( - 12 \beta - 384) q^{62} + 64 q^{64} + ( - 6 \beta + 150) q^{65} + ( - 24 \beta + 72) q^{67} + (4 \beta + 168) q^{68} + ( - 30 \beta + 762) q^{71} + (83 \beta - 372) q^{73} + (24 \beta + 536) q^{74} + ( - 8 \beta + 144) q^{76} + ( - 84 \beta + 488) q^{79} + (16 \beta + 96) q^{80} + ( - 10 \beta + 756) q^{82} + ( - 136 \beta - 156) q^{83} + (48 \beta + 350) q^{85} + ( - 48 \beta + 400) q^{86} + ( - 48 \beta + 16) q^{88} + (29 \beta + 54) q^{89} + (24 \beta + 616) q^{92} + (20 \beta + 312) q^{94} + (24 \beta + 20) q^{95} + ( - 125 \beta + 372) q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q + 4 q^{2} + 8 q^{4} + 12 q^{5} + 16 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( 2 q + 4 q^{2} + 8 q^{4} + 12 q^{5} + 16 q^{8} + 24 q^{10} + 4 q^{11} - 48 q^{13} + 32 q^{16} + 84 q^{17} + 72 q^{19} + 48 q^{20} + 8 q^{22} + 308 q^{23} + 18 q^{25} - 96 q^{26} + 80 q^{29} - 384 q^{31} + 64 q^{32} + 168 q^{34} + 536 q^{37} + 144 q^{38} + 96 q^{40} + 756 q^{41} + 400 q^{43} + 16 q^{44} + 616 q^{46} + 312 q^{47} + 36 q^{50} - 192 q^{52} + 52 q^{53} - 1152 q^{55} + 160 q^{58} + 864 q^{59} - 1416 q^{61} - 768 q^{62} + 128 q^{64} + 300 q^{65} + 144 q^{67} + 336 q^{68} + 1524 q^{71} - 744 q^{73} + 1072 q^{74} + 288 q^{76} + 976 q^{79} + 192 q^{80} + 1512 q^{82} - 312 q^{83} + 700 q^{85} + 800 q^{86} + 32 q^{88} + 108 q^{89} + 1232 q^{92} + 624 q^{94} + 40 q^{95} + 744 q^{97}+O(q^{100}) \) 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.

comment: embeddings in the coefficient field
 
gp: mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1.1
−1.41421
1.41421
2.00000 0 4.00000 −3.89949 0 0 8.00000 0 −7.79899
1.2 2.00000 0 4.00000 15.8995 0 0 8.00000 0 31.7990
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \(-1\)
\(3\) \(-1\)
\(7\) \(1\)

Inner twists

This newform does not admit any (nontrivial) inner twists.

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 882.4.a.bi 2
3.b odd 2 1 294.4.a.k yes 2
7.b odd 2 1 882.4.a.bc 2
7.c even 3 2 882.4.g.y 4
7.d odd 6 2 882.4.g.bd 4
12.b even 2 1 2352.4.a.bn 2
21.c even 2 1 294.4.a.j 2
21.g even 6 2 294.4.e.o 4
21.h odd 6 2 294.4.e.n 4
84.h odd 2 1 2352.4.a.cd 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
294.4.a.j 2 21.c even 2 1
294.4.a.k yes 2 3.b odd 2 1
294.4.e.n 4 21.h odd 6 2
294.4.e.o 4 21.g even 6 2
882.4.a.bc 2 7.b odd 2 1
882.4.a.bi 2 1.a even 1 1 trivial
882.4.g.y 4 7.c even 3 2
882.4.g.bd 4 7.d odd 6 2
2352.4.a.bn 2 12.b even 2 1
2352.4.a.cd 2 84.h odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(882))\):

\( T_{5}^{2} - 12T_{5} - 62 \) Copy content Toggle raw display
\( T_{11}^{2} - 4T_{11} - 3524 \) Copy content Toggle raw display
\( T_{13}^{2} + 48T_{13} - 306 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T - 2)^{2} \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( T^{2} - 12T - 62 \) Copy content Toggle raw display
$7$ \( T^{2} \) Copy content Toggle raw display
$11$ \( T^{2} - 4T - 3524 \) Copy content Toggle raw display
$13$ \( T^{2} + 48T - 306 \) Copy content Toggle raw display
$17$ \( T^{2} - 84T + 1666 \) Copy content Toggle raw display
$19$ \( T^{2} - 72T + 904 \) Copy content Toggle raw display
$23$ \( T^{2} - 308T + 20188 \) Copy content Toggle raw display
$29$ \( T^{2} - 80T - 30152 \) Copy content Toggle raw display
$31$ \( T^{2} + 384T + 33336 \) Copy content Toggle raw display
$37$ \( T^{2} - 536T + 57712 \) Copy content Toggle raw display
$41$ \( T^{2} - 756T + 140434 \) Copy content Toggle raw display
$43$ \( T^{2} - 400T - 16448 \) Copy content Toggle raw display
$47$ \( T^{2} - 312T + 14536 \) Copy content Toggle raw display
$53$ \( T^{2} - 52T - 55772 \) Copy content Toggle raw display
$59$ \( T^{2} - 864T + 186232 \) Copy content Toggle raw display
$61$ \( T^{2} + 1416 T + 484702 \) Copy content Toggle raw display
$67$ \( T^{2} - 144T - 51264 \) Copy content Toggle raw display
$71$ \( T^{2} - 1524 T + 492444 \) Copy content Toggle raw display
$73$ \( T^{2} + 744T - 536738 \) Copy content Toggle raw display
$79$ \( T^{2} - 976T - 453344 \) Copy content Toggle raw display
$83$ \( T^{2} + 312 T - 1788272 \) Copy content Toggle raw display
$89$ \( T^{2} - 108T - 79502 \) Copy content Toggle raw display
$97$ \( T^{2} - 744 T - 1392866 \) Copy content Toggle raw display
show more
show less