Properties

Label 975.2.c.b
Level $975$
Weight $2$
Character orbit 975.c
Analytic conductor $7.785$
Analytic rank $1$
Dimension $2$
Inner twists $2$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [975,2,Mod(274,975)] mf = mfinit([N,k,chi],0) lf = mfeigenbasis(mf)
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(975, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 1, 0])) N = Newforms(chi, 2, names="a")
 
Copy content magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code chi := DirichletCharacter("975.274"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Level: \( N \) \(=\) \( 975 = 3 \cdot 5^{2} \cdot 13 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 975.c (of order \(2\), degree \(1\), not minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [2,0,0,-4,0,4,0,0,-2,0,-10,0,0,12] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(14)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(7.78541419707\)
Analytic rank: \(1\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{-1}) \)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 195)
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-expansion

Copy content comment:q-expansion
 
Copy content sage:f.q_expansion() # note that sage often uses an isomorphic number field
 
Copy content gp:mfcoefs(f, 20)
 

Coefficients of the \(q\)-expansion are expressed in terms of \(i = \sqrt{-1}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + 2 i q^{2} - i q^{3} - 2 q^{4} + 2 q^{6} - 3 i q^{7} - q^{9} - 5 q^{11} + 2 i q^{12} - i q^{13} + 6 q^{14} - 4 q^{16} + 5 i q^{17} - 2 i q^{18} - 2 q^{19} - 3 q^{21} - 10 i q^{22} + i q^{23} + 2 q^{26} + \cdots + 5 q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 4 q^{4} + 4 q^{6} - 2 q^{9} - 10 q^{11} + 12 q^{14} - 8 q^{16} - 4 q^{19} - 6 q^{21} + 4 q^{26} - 20 q^{29} - 4 q^{31} - 20 q^{34} + 4 q^{36} - 2 q^{39} - 18 q^{41} + 20 q^{44} - 4 q^{46} - 4 q^{49}+ \cdots + 10 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/975\mathbb{Z}\right)^\times\).

\(n\) \(301\) \(326\) \(352\)
\(\chi(n)\) \(1\) \(1\) \(-1\)

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.

Copy content comment:embeddings in the coefficient field
 
Copy content gp:mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
274.1
1.00000i
1.00000i
2.00000i 1.00000i −2.00000 0 2.00000 3.00000i 0 −1.00000 0
274.2 2.00000i 1.00000i −2.00000 0 2.00000 3.00000i 0 −1.00000 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
5.b even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 975.2.c.b 2
3.b odd 2 1 2925.2.c.d 2
5.b even 2 1 inner 975.2.c.b 2
5.c odd 4 1 195.2.a.d 1
5.c odd 4 1 975.2.a.b 1
15.d odd 2 1 2925.2.c.d 2
15.e even 4 1 585.2.a.a 1
15.e even 4 1 2925.2.a.t 1
20.e even 4 1 3120.2.a.n 1
35.f even 4 1 9555.2.a.t 1
60.l odd 4 1 9360.2.a.w 1
65.h odd 4 1 2535.2.a.b 1
195.s even 4 1 7605.2.a.v 1
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
195.2.a.d 1 5.c odd 4 1
585.2.a.a 1 15.e even 4 1
975.2.a.b 1 5.c odd 4 1
975.2.c.b 2 1.a even 1 1 trivial
975.2.c.b 2 5.b even 2 1 inner
2535.2.a.b 1 65.h odd 4 1
2925.2.a.t 1 15.e even 4 1
2925.2.c.d 2 3.b odd 2 1
2925.2.c.d 2 15.d odd 2 1
3120.2.a.n 1 20.e even 4 1
7605.2.a.v 1 195.s even 4 1
9360.2.a.w 1 60.l odd 4 1
9555.2.a.t 1 35.f even 4 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(975, [\chi])\):

\( T_{2}^{2} + 4 \) Copy content Toggle raw display
\( T_{7}^{2} + 9 \) Copy content Toggle raw display
\( T_{11} + 5 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} + 4 \) Copy content Toggle raw display
$3$ \( T^{2} + 1 \) Copy content Toggle raw display
$5$ \( T^{2} \) Copy content Toggle raw display
$7$ \( T^{2} + 9 \) Copy content Toggle raw display
$11$ \( (T + 5)^{2} \) Copy content Toggle raw display
$13$ \( T^{2} + 1 \) Copy content Toggle raw display
$17$ \( T^{2} + 25 \) Copy content Toggle raw display
$19$ \( (T + 2)^{2} \) Copy content Toggle raw display
$23$ \( T^{2} + 1 \) Copy content Toggle raw display
$29$ \( (T + 10)^{2} \) Copy content Toggle raw display
$31$ \( (T + 2)^{2} \) Copy content Toggle raw display
$37$ \( T^{2} + 9 \) Copy content Toggle raw display
$41$ \( (T + 9)^{2} \) Copy content Toggle raw display
$43$ \( T^{2} + 16 \) Copy content Toggle raw display
$47$ \( T^{2} + 100 \) Copy content Toggle raw display
$53$ \( T^{2} + 81 \) Copy content Toggle raw display
$59$ \( T^{2} \) Copy content Toggle raw display
$61$ \( (T + 11)^{2} \) Copy content Toggle raw display
$67$ \( T^{2} + 16 \) Copy content Toggle raw display
$71$ \( (T - 15)^{2} \) Copy content Toggle raw display
$73$ \( T^{2} + 36 \) Copy content Toggle raw display
$79$ \( (T - 11)^{2} \) Copy content Toggle raw display
$83$ \( T^{2} + 64 \) Copy content Toggle raw display
$89$ \( (T - 11)^{2} \) Copy content Toggle raw display
$97$ \( T^{2} + 81 \) Copy content Toggle raw display
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