Properties

Label 1900.2.l.a
Level $1900$
Weight $2$
Character orbit 1900.l
Analytic conductor $15.172$
Analytic rank $0$
Dimension $8$
CM discriminant -19
Inner twists $4$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1900,2,Mod(493,1900)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1900, base_ring=CyclotomicField(4))
 
chi = DirichletCharacter(H, H._module([0, 3, 2]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1900.493");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1900 = 2^{2} \cdot 5^{2} \cdot 19 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1900.l (of order \(4\), degree \(2\), 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: \(15.1715763840\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(i)\)
Coefficient field: 8.0.2702336256.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 9x^{6} + 56x^{4} + 225x^{2} + 625 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{19}]\)
Coefficient ring index: \( 2^{3}\cdot 5^{2} \)
Twist minimal: no (minimal twist has level 380)
Sato-Tate group: $\mathrm{U}(1)[D_{4}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (\beta_{5} + \beta_1 + 1) q^{7} - 3 \beta_1 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + (\beta_{5} + \beta_1 + 1) q^{7} - 3 \beta_1 q^{9} + ( - \beta_{7} - \beta_{6} - \beta_{5} + \cdots - 1) q^{11}+ \cdots + ( - 3 \beta_{6} + 3 \beta_{5} + \cdots + 3 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 6 q^{7}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 6 q^{7} - 14 q^{17} - 16 q^{23} - 2 q^{43} + 26 q^{47} + 18 q^{63} - 22 q^{73} - 26 q^{77} - 72 q^{81} + 64 q^{83}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 9x^{6} + 56x^{4} + 225x^{2} + 625 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( 9\nu^{7} + 56\nu^{5} + 154\nu^{3} + 625\nu ) / 1750 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -2\nu^{7} - 9\nu^{6} - 28\nu^{5} - 56\nu^{4} - 252\nu^{3} - 504\nu^{2} - 1710\nu - 1325 ) / 700 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{6} - 27 ) / 28 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( \nu^{7} - 20\nu^{6} - 16\nu^{5} - 180\nu^{4} - 44\nu^{3} - 620\nu^{2} - 175\nu - 2000 ) / 500 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -7\nu^{7} - \nu^{6} - 28\nu^{5} - 84\nu^{4} - 252\nu^{3} - 56\nu^{2} - 1015\nu - 925 ) / 700 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -7\nu^{7} - 135\nu^{6} + 112\nu^{5} - 840\nu^{4} + 308\nu^{3} - 4060\nu^{2} + 4725\nu - 12875 ) / 3500 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 9\nu^{7} + 56\nu^{5} + 404\nu^{3} + 625\nu ) / 500 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( -3\beta_{7} + \beta_{6} - 3\beta_{5} + \beta_{4} + \beta_{3} - 3\beta_{2} + 3\beta _1 - 1 ) / 10 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{7} - 7\beta_{6} + 11\beta_{5} + 3\beta_{4} - 7\beta_{3} - 9\beta_{2} + 9\beta _1 - 23 ) / 10 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( 2\beta_{7} - 7\beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( -9\beta_{7} + 13\beta_{6} - 49\beta_{5} - 27\beta_{4} - 7\beta_{3} + 31\beta_{2} - 31\beta _1 - 73 ) / 10 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( 23\beta_{7} + 79\beta_{6} + 123\beta_{5} - 101\beta_{4} - 11\beta_{3} + 33\beta_{2} + 247\beta _1 + 101 ) / 10 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 28\beta_{3} + 27 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( -277\beta_{7} - 561\beta_{6} - 557\beta_{5} + 559\beta_{4} - \beta_{3} + 3\beta_{2} + 1397\beta _1 - 559 ) / 10 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1900\mathbb{Z}\right)^\times\).

\(n\) \(77\) \(401\) \(951\)
\(\chi(n)\) \(\beta_{1}\) \(-1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
493.1
−0.656712 2.13746i
0.656712 2.13746i
1.52274 + 1.63746i
−1.52274 + 1.63746i
−0.656712 + 2.13746i
0.656712 + 2.13746i
1.52274 1.63746i
−1.52274 1.63746i
0 0 0 0 0 −3.52622 + 3.52622i 0 3.00000i 0
493.2 0 0 0 0 0 1.25130 1.25130i 0 3.00000i 0
493.3 0 0 0 0 0 2.42815 2.42815i 0 3.00000i 0
493.4 0 0 0 0 0 2.84677 2.84677i 0 3.00000i 0
1557.1 0 0 0 0 0 −3.52622 3.52622i 0 3.00000i 0
1557.2 0 0 0 0 0 1.25130 + 1.25130i 0 3.00000i 0
1557.3 0 0 0 0 0 2.42815 + 2.42815i 0 3.00000i 0
1557.4 0 0 0 0 0 2.84677 + 2.84677i 0 3.00000i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 493.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
19.b odd 2 1 CM by \(\Q(\sqrt{-19}) \)
5.c odd 4 1 inner
95.g even 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1900.2.l.a 8
5.b even 2 1 380.2.l.a 8
5.c odd 4 1 380.2.l.a 8
5.c odd 4 1 inner 1900.2.l.a 8
15.d odd 2 1 3420.2.bb.c 8
15.e even 4 1 3420.2.bb.c 8
19.b odd 2 1 CM 1900.2.l.a 8
95.d odd 2 1 380.2.l.a 8
95.g even 4 1 380.2.l.a 8
95.g even 4 1 inner 1900.2.l.a 8
285.b even 2 1 3420.2.bb.c 8
285.j odd 4 1 3420.2.bb.c 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
380.2.l.a 8 5.b even 2 1
380.2.l.a 8 5.c odd 4 1
380.2.l.a 8 95.d odd 2 1
380.2.l.a 8 95.g even 4 1
1900.2.l.a 8 1.a even 1 1 trivial
1900.2.l.a 8 5.c odd 4 1 inner
1900.2.l.a 8 19.b odd 2 1 CM
1900.2.l.a 8 95.g even 4 1 inner
3420.2.bb.c 8 15.d odd 2 1
3420.2.bb.c 8 15.e even 4 1
3420.2.bb.c 8 285.b even 2 1
3420.2.bb.c 8 285.j odd 4 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3} \) acting on \(S_{2}^{\mathrm{new}}(1900, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( T^{8} \) Copy content Toggle raw display
$7$ \( T^{8} - 6 T^{7} + \cdots + 14884 \) Copy content Toggle raw display
$11$ \( (T^{4} - 47 T^{2} + 196)^{2} \) Copy content Toggle raw display
$13$ \( T^{8} \) Copy content Toggle raw display
$17$ \( T^{8} + 14 T^{7} + \cdots + 412164 \) Copy content Toggle raw display
$19$ \( (T^{2} + 19)^{4} \) Copy content Toggle raw display
$23$ \( (T^{4} + 8 T^{3} + \cdots + 900)^{2} \) Copy content Toggle raw display
$29$ \( T^{8} \) Copy content Toggle raw display
$31$ \( T^{8} \) Copy content Toggle raw display
$37$ \( T^{8} \) Copy content Toggle raw display
$41$ \( T^{8} \) Copy content Toggle raw display
$43$ \( T^{8} + 2 T^{7} + \cdots + 2815684 \) Copy content Toggle raw display
$47$ \( T^{8} - 26 T^{7} + \cdots + 1004004 \) Copy content Toggle raw display
$53$ \( T^{8} \) Copy content Toggle raw display
$59$ \( T^{8} \) Copy content Toggle raw display
$61$ \( (T^{4} - 347 T^{2} + 26896)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( T^{8} \) Copy content Toggle raw display
$73$ \( T^{8} + 22 T^{7} + \cdots + 235991044 \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( (T^{4} - 32 T^{3} + \cdots + 8100)^{2} \) Copy content Toggle raw display
$89$ \( T^{8} \) Copy content Toggle raw display
$97$ \( T^{8} \) Copy content Toggle raw display
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