Properties

Label 1800.2.b.f
Level $1800$
Weight $2$
Character orbit 1800.b
Analytic conductor $14.373$
Analytic rank $0$
Dimension $8$
CM discriminant -40
Inner twists $8$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1800,2,Mod(251,1800)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1800, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 1, 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("1800.251");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1800 = 2^{3} \cdot 3^{2} \cdot 5^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1800.b (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: \(14.3730723638\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.40960000.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 7x^{4} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{11}]\)
Coefficient ring index: \( 2^{10}\cdot 3^{2} \)
Twist minimal: no (minimal twist has level 360)
Sato-Tate group: $\mathrm{U}(1)[D_{2}]$

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

\(f(q)\) \(=\) \( q + \beta_{2} q^{2} + 2 q^{4} - \beta_{5} q^{7} + 2 \beta_{2} q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{2} q^{2} + 2 q^{4} - \beta_{5} q^{7} + 2 \beta_{2} q^{8} - \beta_{3} q^{11} - \beta_{4} q^{13} + (\beta_{6} + \beta_{3}) q^{14} + 4 q^{16} + \beta_{7} q^{19} + (\beta_{5} - \beta_{4}) q^{22} + \beta_1 q^{23} + (\beta_{6} - \beta_{3}) q^{26} - 2 \beta_{5} q^{28} + 4 \beta_{2} q^{32} + ( - 2 \beta_{5} - \beta_{4}) q^{37} - 2 \beta_1 q^{38} + (\beta_{6} + 2 \beta_{3}) q^{41} - 2 \beta_{3} q^{44} - \beta_{7} q^{46} + 2 \beta_{2} q^{47} + ( - 2 \beta_{7} - 7) q^{49} - 2 \beta_{4} q^{52} + 4 \beta_{2} q^{53} + (2 \beta_{6} + 2 \beta_{3}) q^{56} + ( - 2 \beta_{6} + \beta_{3}) q^{59} + 8 q^{64} + (3 \beta_{6} + \beta_{3}) q^{74} + 2 \beta_{7} q^{76} + (8 \beta_{2} - \beta_1) q^{77} + ( - 3 \beta_{5} + \beta_{4}) q^{82} + (2 \beta_{5} - 2 \beta_{4}) q^{88} + ( - 3 \beta_{6} - 2 \beta_{3}) q^{89} + ( - \beta_{7} + 2) q^{91} + 2 \beta_1 q^{92} + 4 q^{94} + ( - 7 \beta_{2} + 4 \beta_1) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 16 q^{4}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 16 q^{4} + 32 q^{16} - 56 q^{49} + 64 q^{64} + 16 q^{91} + 32 q^{94}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 7x^{4} + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( 4\nu^{4} + 14 ) / 3 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 2\nu^{7} - \nu^{5} + 13\nu^{3} - 5\nu ) / 3 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 2\nu^{7} - 6\nu^{6} + \nu^{5} + 13\nu^{3} - 36\nu^{2} + 5\nu ) / 3 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 4\nu^{7} - 4\nu^{6} + \nu^{5} + 29\nu^{3} - 32\nu^{2} + 11\nu ) / 3 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -4\nu^{7} - 2\nu^{6} - \nu^{5} - 29\nu^{3} - 16\nu^{2} - 11\nu ) / 3 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( -2\nu^{7} - \nu^{5} - 13\nu^{3} - 5\nu \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -8\nu^{7} + 2\nu^{5} - 58\nu^{3} + 22\nu ) / 3 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( 3\beta_{7} + 2\beta_{6} - 4\beta_{5} + 2\beta_{4} + 6\beta_{2} ) / 24 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{6} - 3\beta_{5} - 3\beta_{4} + 3\beta_{3} ) / 12 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -3\beta_{7} + 4\beta_{6} - 4\beta_{5} + 2\beta_{4} - 12\beta_{2} ) / 12 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( 3\beta _1 - 14 ) / 4 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -15\beta_{7} - 22\beta_{6} + 20\beta_{5} - 10\beta_{4} - 66\beta_{2} ) / 24 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( -4\beta_{6} + 9\beta_{5} + 9\beta_{4} - 12\beta_{3} ) / 6 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( 39\beta_{7} - 58\beta_{6} + 52\beta_{5} - 26\beta_{4} + 174\beta_{2} ) / 24 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1800\mathbb{Z}\right)^\times\).

\(n\) \(577\) \(901\) \(1001\) \(1351\)
\(\chi(n)\) \(1\) \(-1\) \(-1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
251.1
0.437016 0.437016i
−1.14412 1.14412i
−1.14412 + 1.14412i
0.437016 + 0.437016i
1.14412 1.14412i
−0.437016 0.437016i
−0.437016 + 0.437016i
1.14412 + 1.14412i
−1.41421 0 2.00000 0 0 5.16228i −2.82843 0 0
251.2 −1.41421 0 2.00000 0 0 1.16228i −2.82843 0 0
251.3 −1.41421 0 2.00000 0 0 1.16228i −2.82843 0 0
251.4 −1.41421 0 2.00000 0 0 5.16228i −2.82843 0 0
251.5 1.41421 0 2.00000 0 0 5.16228i 2.82843 0 0
251.6 1.41421 0 2.00000 0 0 1.16228i 2.82843 0 0
251.7 1.41421 0 2.00000 0 0 1.16228i 2.82843 0 0
251.8 1.41421 0 2.00000 0 0 5.16228i 2.82843 0 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 251.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
40.e odd 2 1 CM by \(\Q(\sqrt{-10}) \)
3.b odd 2 1 inner
5.b even 2 1 inner
8.d odd 2 1 inner
15.d odd 2 1 inner
24.f even 2 1 inner
120.m even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1800.2.b.f 8
3.b odd 2 1 inner 1800.2.b.f 8
4.b odd 2 1 7200.2.b.f 8
5.b even 2 1 inner 1800.2.b.f 8
5.c odd 4 1 360.2.m.a 4
5.c odd 4 1 360.2.m.b yes 4
8.b even 2 1 7200.2.b.f 8
8.d odd 2 1 inner 1800.2.b.f 8
12.b even 2 1 7200.2.b.f 8
15.d odd 2 1 inner 1800.2.b.f 8
15.e even 4 1 360.2.m.a 4
15.e even 4 1 360.2.m.b yes 4
20.d odd 2 1 7200.2.b.f 8
20.e even 4 1 1440.2.m.a 4
20.e even 4 1 1440.2.m.b 4
24.f even 2 1 inner 1800.2.b.f 8
24.h odd 2 1 7200.2.b.f 8
40.e odd 2 1 CM 1800.2.b.f 8
40.f even 2 1 7200.2.b.f 8
40.i odd 4 1 1440.2.m.a 4
40.i odd 4 1 1440.2.m.b 4
40.k even 4 1 360.2.m.a 4
40.k even 4 1 360.2.m.b yes 4
60.h even 2 1 7200.2.b.f 8
60.l odd 4 1 1440.2.m.a 4
60.l odd 4 1 1440.2.m.b 4
120.i odd 2 1 7200.2.b.f 8
120.m even 2 1 inner 1800.2.b.f 8
120.q odd 4 1 360.2.m.a 4
120.q odd 4 1 360.2.m.b yes 4
120.w even 4 1 1440.2.m.a 4
120.w even 4 1 1440.2.m.b 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
360.2.m.a 4 5.c odd 4 1
360.2.m.a 4 15.e even 4 1
360.2.m.a 4 40.k even 4 1
360.2.m.a 4 120.q odd 4 1
360.2.m.b yes 4 5.c odd 4 1
360.2.m.b yes 4 15.e even 4 1
360.2.m.b yes 4 40.k even 4 1
360.2.m.b yes 4 120.q odd 4 1
1440.2.m.a 4 20.e even 4 1
1440.2.m.a 4 40.i odd 4 1
1440.2.m.a 4 60.l odd 4 1
1440.2.m.a 4 120.w even 4 1
1440.2.m.b 4 20.e even 4 1
1440.2.m.b 4 40.i odd 4 1
1440.2.m.b 4 60.l odd 4 1
1440.2.m.b 4 120.w even 4 1
1800.2.b.f 8 1.a even 1 1 trivial
1800.2.b.f 8 3.b odd 2 1 inner
1800.2.b.f 8 5.b even 2 1 inner
1800.2.b.f 8 8.d odd 2 1 inner
1800.2.b.f 8 15.d odd 2 1 inner
1800.2.b.f 8 24.f even 2 1 inner
1800.2.b.f 8 40.e odd 2 1 CM
1800.2.b.f 8 120.m even 2 1 inner
7200.2.b.f 8 4.b odd 2 1
7200.2.b.f 8 8.b even 2 1
7200.2.b.f 8 12.b even 2 1
7200.2.b.f 8 20.d odd 2 1
7200.2.b.f 8 24.h odd 2 1
7200.2.b.f 8 40.f even 2 1
7200.2.b.f 8 60.h even 2 1
7200.2.b.f 8 120.i odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1800, [\chi])\):

\( T_{7}^{4} + 28T_{7}^{2} + 36 \) Copy content Toggle raw display
\( T_{23}^{2} - 20 \) Copy content Toggle raw display
\( T_{43} \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{2} - 2)^{4} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( T^{8} \) Copy content Toggle raw display
$7$ \( (T^{4} + 28 T^{2} + 36)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} + 44 T^{2} + 324)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 52 T^{2} + 36)^{2} \) Copy content Toggle raw display
$17$ \( T^{8} \) Copy content Toggle raw display
$19$ \( (T^{2} - 40)^{4} \) Copy content Toggle raw display
$23$ \( (T^{2} - 20)^{4} \) Copy content Toggle raw display
$29$ \( T^{8} \) Copy content Toggle raw display
$31$ \( T^{8} \) Copy content Toggle raw display
$37$ \( (T^{4} + 148 T^{2} + 2916)^{2} \) Copy content Toggle raw display
$41$ \( (T^{4} + 164 T^{2} + 6084)^{2} \) Copy content Toggle raw display
$43$ \( T^{8} \) Copy content Toggle raw display
$47$ \( (T^{2} - 8)^{4} \) Copy content Toggle raw display
$53$ \( (T^{2} - 32)^{4} \) Copy content Toggle raw display
$59$ \( (T^{4} + 236 T^{2} + 6084)^{2} \) Copy content Toggle raw display
$61$ \( T^{8} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( T^{8} \) Copy content Toggle raw display
$73$ \( T^{8} \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( T^{8} \) Copy content Toggle raw display
$89$ \( (T^{4} + 356 T^{2} + 324)^{2} \) Copy content Toggle raw display
$97$ \( T^{8} \) Copy content Toggle raw display
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