Properties

Label 2100.2.f.b
Level $2100$
Weight $2$
Character orbit 2100.f
Analytic conductor $16.769$
Analytic rank $1$
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] = [2100,2,Mod(1049,2100)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2100, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 1, 1, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2100.1049");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2100 = 2^{2} \cdot 3 \cdot 5^{2} \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 2100.f (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: \(16.7685844245\)
Analytic rank: \(1\)
Dimension: \(4\)
Coefficient field: \(\Q(i, \sqrt{5})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} + 3x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{2} \)
Twist minimal: no (minimal twist has level 420)
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.

\(f(q)\) \(=\) \( q + \beta_1 q^{3} + ( - \beta_{2} - \beta_1 - 2) q^{7} + ( - \beta_{3} - \beta_{2} - \beta_1) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_1 q^{3} + ( - \beta_{2} - \beta_1 - 2) q^{7} + ( - \beta_{3} - \beta_{2} - \beta_1) q^{9} + ( - \beta_{3} + 2 \beta_{2} + \beta_1 + 1) q^{11} + (\beta_{3} + \beta_1 - 1) q^{13} + (2 \beta_{3} - \beta_{2} - 2 \beta_1 - 2) q^{17} + ( - \beta_{3} - 2 \beta_{2} + \beta_1 + 1) q^{19} + ( - \beta_{3} + 2 \beta_{2} - \beta_1) q^{21} + ( - 3 \beta_{3} - 3 \beta_1 - 1) q^{23} + ( - \beta_{3} + 2 \beta_{2} - 3) q^{27} + 2 \beta_{2} q^{29} + ( - \beta_{3} + \beta_1 + 1) q^{31} + (3 \beta_{3} - 3 \beta_{2} - \beta_1 - 3) q^{33} + (2 \beta_{3} - \beta_{2} - 2 \beta_1 - 2) q^{37} + ( - \beta_{3} - \beta_{2} - \beta_1 + 3) q^{39} + (2 \beta_{3} + 2 \beta_1 - 8) q^{41} + (\beta_{3} + 2 \beta_{2} - \beta_1 - 1) q^{43} + ( - \beta_{3} + \beta_1 + 1) q^{47} + (3 \beta_{3} + \beta_{2} + 3 \beta_1) q^{49} + (3 \beta_{2} + 2 \beta_1 + 6) q^{51} + ( - \beta_{3} - \beta_1 - 7) q^{53} + ( - 5 \beta_{3} + \beta_{2} - \beta_1 - 3) q^{57} + ( - 4 \beta_{3} - 4 \beta_1) q^{59} + ( - 4 \beta_{3} + 4 \beta_{2} + \cdots + 4) q^{61}+ \cdots + ( - 5 \beta_{3} + 4 \beta_{2} + \cdots + 9) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 2 q^{3} - 6 q^{7}+O(q^{10}) \) Copy content Toggle raw display \( 4 q - 2 q^{3} - 6 q^{7} - 4 q^{13} - 4 q^{23} - 14 q^{27} - 4 q^{33} + 12 q^{39} - 32 q^{41} + 20 q^{51} - 28 q^{53} - 20 q^{57} - 2 q^{63} - 28 q^{69} - 36 q^{73} + 28 q^{77} - 24 q^{79} + 4 q^{81} + 8 q^{87} + 32 q^{89} - 4 q^{91} - 12 q^{93} + 12 q^{97} + 24 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} + 3x^{2} + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu^{3} + \nu^{2} + 3\nu + 1 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( -2\nu^{3} - 4\nu \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( -\nu^{3} + \nu^{2} - 3\nu + 2 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( -\beta_{3} + \beta_{2} + \beta _1 + 1 ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{3} + \beta _1 - 3 ) / 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 2\beta_{3} - 3\beta_{2} - 2\beta _1 - 2 ) / 2 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2100\mathbb{Z}\right)^\times\).

\(n\) \(701\) \(1051\) \(1177\) \(1501\)
\(\chi(n)\) \(-1\) \(1\) \(-1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1049.1
1.61803i
1.61803i
0.618034i
0.618034i
0 −1.61803 0.618034i 0 0 0 −0.381966 + 2.61803i 0 2.23607 + 2.00000i 0
1049.2 0 −1.61803 + 0.618034i 0 0 0 −0.381966 2.61803i 0 2.23607 2.00000i 0
1049.3 0 0.618034 1.61803i 0 0 0 −2.61803 0.381966i 0 −2.23607 2.00000i 0
1049.4 0 0.618034 + 1.61803i 0 0 0 −2.61803 + 0.381966i 0 −2.23607 + 2.00000i 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
105.g even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2100.2.f.b 4
3.b odd 2 1 2100.2.f.a 4
5.b even 2 1 2100.2.f.h 4
5.c odd 4 1 420.2.d.d yes 4
5.c odd 4 1 2100.2.d.g 4
7.b odd 2 1 2100.2.f.g 4
15.d odd 2 1 2100.2.f.g 4
15.e even 4 1 420.2.d.c 4
15.e even 4 1 2100.2.d.h 4
20.e even 4 1 1680.2.f.f 4
21.c even 2 1 2100.2.f.h 4
35.c odd 2 1 2100.2.f.a 4
35.f even 4 1 420.2.d.c 4
35.f even 4 1 2100.2.d.h 4
60.l odd 4 1 1680.2.f.j 4
105.g even 2 1 inner 2100.2.f.b 4
105.k odd 4 1 420.2.d.d yes 4
105.k odd 4 1 2100.2.d.g 4
140.j odd 4 1 1680.2.f.j 4
420.w even 4 1 1680.2.f.f 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
420.2.d.c 4 15.e even 4 1
420.2.d.c 4 35.f even 4 1
420.2.d.d yes 4 5.c odd 4 1
420.2.d.d yes 4 105.k odd 4 1
1680.2.f.f 4 20.e even 4 1
1680.2.f.f 4 420.w even 4 1
1680.2.f.j 4 60.l odd 4 1
1680.2.f.j 4 140.j odd 4 1
2100.2.d.g 4 5.c odd 4 1
2100.2.d.g 4 105.k odd 4 1
2100.2.d.h 4 15.e even 4 1
2100.2.d.h 4 35.f even 4 1
2100.2.f.a 4 3.b odd 2 1
2100.2.f.a 4 35.c odd 2 1
2100.2.f.b 4 1.a even 1 1 trivial
2100.2.f.b 4 105.g even 2 1 inner
2100.2.f.g 4 7.b odd 2 1
2100.2.f.g 4 15.d odd 2 1
2100.2.f.h 4 5.b even 2 1
2100.2.f.h 4 21.c even 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(2100, [\chi])\):

\( T_{11}^{4} + 28T_{11}^{2} + 16 \) Copy content Toggle raw display
\( T_{13}^{2} + 2T_{13} - 4 \) Copy content Toggle raw display
\( T_{23}^{2} + 2T_{23} - 44 \) Copy content Toggle raw display
\( T_{41}^{2} + 16T_{41} + 44 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( T^{4} + 2 T^{3} + \cdots + 9 \) Copy content Toggle raw display
$5$ \( T^{4} \) Copy content Toggle raw display
$7$ \( T^{4} + 6 T^{3} + \cdots + 49 \) Copy content Toggle raw display
$11$ \( T^{4} + 28T^{2} + 16 \) Copy content Toggle raw display
$13$ \( (T^{2} + 2 T - 4)^{2} \) Copy content Toggle raw display
$17$ \( (T^{2} + 20)^{2} \) Copy content Toggle raw display
$19$ \( T^{4} + 60T^{2} + 400 \) Copy content Toggle raw display
$23$ \( (T^{2} + 2 T - 44)^{2} \) Copy content Toggle raw display
$29$ \( (T^{2} + 16)^{2} \) Copy content Toggle raw display
$31$ \( T^{4} + 12T^{2} + 16 \) Copy content Toggle raw display
$37$ \( (T^{2} + 20)^{2} \) Copy content Toggle raw display
$41$ \( (T^{2} + 16 T + 44)^{2} \) Copy content Toggle raw display
$43$ \( T^{4} + 60T^{2} + 400 \) Copy content Toggle raw display
$47$ \( T^{4} + 12T^{2} + 16 \) Copy content Toggle raw display
$53$ \( (T^{2} + 14 T + 44)^{2} \) Copy content Toggle raw display
$59$ \( (T^{2} - 80)^{2} \) Copy content Toggle raw display
$61$ \( T^{4} + 192T^{2} + 4096 \) Copy content Toggle raw display
$67$ \( T^{4} + 108T^{2} + 1296 \) Copy content Toggle raw display
$71$ \( T^{4} + 252 T^{2} + 15376 \) Copy content Toggle raw display
$73$ \( (T^{2} + 18 T + 76)^{2} \) Copy content Toggle raw display
$79$ \( (T^{2} + 12 T + 16)^{2} \) Copy content Toggle raw display
$83$ \( T^{4} + 60T^{2} + 400 \) Copy content Toggle raw display
$89$ \( (T^{2} - 16 T + 44)^{2} \) Copy content Toggle raw display
$97$ \( (T^{2} - 6 T - 116)^{2} \) Copy content Toggle raw display
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