Properties

Label 2028.4.b.g
Level $2028$
Weight $4$
Character orbit 2028.b
Analytic conductor $119.656$
Analytic rank $0$
Dimension $4$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [2028,4,Mod(337,2028)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2028, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 1]))
 
N = Newforms(chi, 4, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2028.337");
 
S:= CuspForms(chi, 4);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2028 = 2^{2} \cdot 3 \cdot 13^{2} \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 2028.b (of order \(2\), degree \(1\), not 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: \(119.655873492\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\Q(\zeta_{12})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{2}\cdot 3^{2} \)
Twist minimal: no (minimal twist has level 156)
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 a basis \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + 3 q^{3} + (3 \beta_{2} + 4 \beta_1) q^{5} + ( - \beta_{2} - \beta_1) q^{7} + 9 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + 3 q^{3} + (3 \beta_{2} + 4 \beta_1) q^{5} + ( - \beta_{2} - \beta_1) q^{7} + 9 q^{9} + (15 \beta_{2} + 7 \beta_1) q^{11} + (9 \beta_{2} + 12 \beta_1) q^{15} + (5 \beta_{3} + 84) q^{17} + (15 \beta_{2} - 23 \beta_1) q^{19} + ( - 3 \beta_{2} - 3 \beta_1) q^{21} + (23 \beta_{3} + 3) q^{23} + ( - 24 \beta_{3} - 46) q^{25} + 27 q^{27} + (44 \beta_{3} + 81) q^{29} + ( - 58 \beta_{2} - 46 \beta_1) q^{31} + (45 \beta_{2} + 21 \beta_1) q^{33} + (7 \beta_{3} + 45) q^{35} - 49 \beta_1 q^{37} + (90 \beta_{2} - 67 \beta_1) q^{41} + (55 \beta_{3} + 143) q^{43} + (27 \beta_{2} + 36 \beta_1) q^{45} + (63 \beta_{2} + 97 \beta_1) q^{47} + ( - 2 \beta_{3} + 331) q^{49} + (15 \beta_{3} + 252) q^{51} + (52 \beta_{3} - 33) q^{53} + ( - 81 \beta_{3} - 387) q^{55} + (45 \beta_{2} - 69 \beta_1) q^{57} + 80 \beta_1 q^{59} + ( - 33 \beta_{3} - 638) q^{61} + ( - 9 \beta_{2} - 9 \beta_1) q^{63} + ( - 175 \beta_{2} + 3 \beta_1) q^{67} + (69 \beta_{3} + 9) q^{69} + (3 \beta_{2} - 111 \beta_1) q^{71} + (95 \beta_{2} - 96 \beta_1) q^{73} + ( - 72 \beta_{3} - 138) q^{75} + (22 \beta_{3} + 108) q^{77} + (38 \beta_{3} + 334) q^{79} + 81 q^{81} + (219 \beta_{2} - \beta_1) q^{83} + (432 \beta_{2} + 381 \beta_1) q^{85} + (132 \beta_{3} + 243) q^{87} + (498 \beta_{2} - 194 \beta_1) q^{89} + ( - 174 \beta_{2} - 138 \beta_1) q^{93} + (9 \beta_{3} + 693) q^{95} + (200 \beta_{2} + 122 \beta_1) q^{97} + (135 \beta_{2} + 63 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 12 q^{3} + 36 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 4 q + 12 q^{3} + 36 q^{9} + 336 q^{17} + 12 q^{23} - 184 q^{25} + 108 q^{27} + 324 q^{29} + 180 q^{35} + 572 q^{43} + 1324 q^{49} + 1008 q^{51} - 132 q^{53} - 1548 q^{55} - 2552 q^{61} + 36 q^{69} - 552 q^{75} + 432 q^{77} + 1336 q^{79} + 324 q^{81} + 972 q^{87} + 2772 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring

\(\beta_{1}\)\(=\) \( 3\zeta_{12}^{3} \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( 2\zeta_{12}^{2} - 1 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( -3\zeta_{12}^{3} + 6\zeta_{12} \) Copy content Toggle raw display
\(\zeta_{12}\)\(=\) \( ( \beta_{3} + \beta_1 ) / 6 \) Copy content Toggle raw display
\(\zeta_{12}^{2}\)\(=\) \( ( \beta_{2} + 1 ) / 2 \) Copy content Toggle raw display
\(\zeta_{12}^{3}\)\(=\) \( ( \beta_1 ) / 3 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2028\mathbb{Z}\right)^\times\).

\(n\) \(677\) \(1015\) \(1861\)
\(\chi(n)\) \(1\) \(1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
337.1
0.866025 0.500000i
−0.866025 0.500000i
−0.866025 + 0.500000i
0.866025 + 0.500000i
0 3.00000 0 17.1962i 0 4.73205i 0 9.00000 0
337.2 0 3.00000 0 6.80385i 0 1.26795i 0 9.00000 0
337.3 0 3.00000 0 6.80385i 0 1.26795i 0 9.00000 0
337.4 0 3.00000 0 17.1962i 0 4.73205i 0 9.00000 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
13.b even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2028.4.b.g 4
13.b even 2 1 inner 2028.4.b.g 4
13.c even 3 1 156.4.q.b 4
13.d odd 4 1 2028.4.a.f 2
13.d odd 4 1 2028.4.a.i 2
13.e even 6 1 156.4.q.b 4
39.h odd 6 1 468.4.t.d 4
39.i odd 6 1 468.4.t.d 4
52.i odd 6 1 624.4.bv.d 4
52.j odd 6 1 624.4.bv.d 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
156.4.q.b 4 13.c even 3 1
156.4.q.b 4 13.e even 6 1
468.4.t.d 4 39.h odd 6 1
468.4.t.d 4 39.i odd 6 1
624.4.bv.d 4 52.i odd 6 1
624.4.bv.d 4 52.j odd 6 1
2028.4.a.f 2 13.d odd 4 1
2028.4.a.i 2 13.d odd 4 1
2028.4.b.g 4 1.a even 1 1 trivial
2028.4.b.g 4 13.b even 2 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{4} + 342T_{5}^{2} + 13689 \) acting on \(S_{4}^{\mathrm{new}}(2028, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( (T - 3)^{4} \) Copy content Toggle raw display
$5$ \( T^{4} + 342 T^{2} + 13689 \) Copy content Toggle raw display
$7$ \( T^{4} + 24T^{2} + 36 \) Copy content Toggle raw display
$11$ \( T^{4} + 2232 T^{2} + 54756 \) Copy content Toggle raw display
$13$ \( T^{4} \) Copy content Toggle raw display
$17$ \( (T^{2} - 168 T + 6381)^{2} \) Copy content Toggle raw display
$19$ \( T^{4} + 10872 T^{2} + 16695396 \) Copy content Toggle raw display
$23$ \( (T^{2} - 6 T - 14274)^{2} \) Copy content Toggle raw display
$29$ \( (T^{2} - 162 T - 45711)^{2} \) Copy content Toggle raw display
$31$ \( T^{4} + 58272 T^{2} + 80138304 \) Copy content Toggle raw display
$37$ \( (T^{2} + 21609)^{2} \) Copy content Toggle raw display
$41$ \( T^{4} + 129402 T^{2} + 259242201 \) Copy content Toggle raw display
$43$ \( (T^{2} - 286 T - 61226)^{2} \) Copy content Toggle raw display
$47$ \( T^{4} + \cdots + 5296055076 \) Copy content Toggle raw display
$53$ \( (T^{2} + 66 T - 71919)^{2} \) Copy content Toggle raw display
$59$ \( (T^{2} + 57600)^{2} \) Copy content Toggle raw display
$61$ \( (T^{2} + 1276 T + 377641)^{2} \) Copy content Toggle raw display
$67$ \( T^{4} + \cdots + 8426138436 \) Copy content Toggle raw display
$71$ \( T^{4} + \cdots + 12290383044 \) Copy content Toggle raw display
$73$ \( T^{4} + \cdots + 3121345161 \) Copy content Toggle raw display
$79$ \( (T^{2} - 668 T + 72568)^{2} \) Copy content Toggle raw display
$83$ \( T^{4} + \cdots + 20699727876 \) Copy content Toggle raw display
$89$ \( T^{4} + \cdots + 164258362944 \) Copy content Toggle raw display
$97$ \( T^{4} + 507912 T^{2} + 194769936 \) Copy content Toggle raw display
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