Properties

Label 975.2.s.c
Level $975$
Weight $2$
Character orbit 975.s
Analytic conductor $7.785$
Analytic rank $0$
Dimension $16$
CM discriminant -39
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [975,2,Mod(818,975)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(975, base_ring=CyclotomicField(4))
 
chi = DirichletCharacter(H, H._module([2, 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("975.818");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 975 = 3 \cdot 5^{2} \cdot 13 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 975.s (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: \(7.78541419707\)
Analytic rank: \(0\)
Dimension: \(16\)
Relative dimension: \(8\) over \(\Q(i)\)
Coefficient field: \(\mathbb{Q}[x]/(x^{16} - \cdots)\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{16} - 7x^{8} + 256 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 2^{4}\cdot 5^{2} \)
Twist minimal: no (minimal twist has level 195)
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 \(1,\beta_1,\ldots,\beta_{15}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \beta_1 q^{2} + \beta_{3} q^{3} + (\beta_{10} + 2 \beta_{2}) q^{4} + \beta_{8} q^{6} + ( - 2 \beta_{14} + \beta_{4}) q^{8} - 3 \beta_{2} q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_1 q^{2} + \beta_{3} q^{3} + (\beta_{10} + 2 \beta_{2}) q^{4} + \beta_{8} q^{6} + ( - 2 \beta_{14} + \beta_{4}) q^{8} - 3 \beta_{2} q^{9} + (\beta_{14} + \beta_{11} + \beta_1) q^{11} + (\beta_{6} + 2 \beta_{5} - \beta_{2} - 2) q^{12} + ( - \beta_{12} + \beta_{10} + \cdots - \beta_{3}) q^{13}+ \cdots + (3 \beta_{14} + 3 \beta_{13} - 3 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 16 q+O(q^{10}) \) Copy content Toggle raw display \( 16 q - 24 q^{12} - 64 q^{16} + 56 q^{22} + 96 q^{36} - 32 q^{43} + 48 q^{48} - 104 q^{52} - 144 q^{81} + 136 q^{82} - 104 q^{88}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{16} - 7x^{8} + 256 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{11} + 9\nu^{3} + 40\nu ) / 40 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{12} + 9\nu^{4} ) / 80 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -\nu^{10} + 11\nu^{2} ) / 20 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -\nu^{9} + 10\nu^{3} - 9\nu ) / 10 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -\nu^{14} + 71\nu^{6} ) / 320 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -3\nu^{12} + 16\nu^{8} + 53\nu^{4} - 16 ) / 80 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -\nu^{15} + 32\nu^{9} + 71\nu^{7} - 352\nu ) / 320 \) Copy content Toggle raw display
\(\beta_{8}\)\(=\) \( ( -\nu^{13} - 8\nu^{11} + 71\nu^{5} + 88\nu^{3} ) / 160 \) Copy content Toggle raw display
\(\beta_{9}\)\(=\) \( ( -3\nu^{12} - 16\nu^{8} + 53\nu^{4} + 16 ) / 80 \) Copy content Toggle raw display
\(\beta_{10}\)\(=\) \( ( \nu^{14} - 7\nu^{6} + 64\nu^{2} ) / 64 \) Copy content Toggle raw display
\(\beta_{11}\)\(=\) \( ( -\nu^{15} + 4\nu^{13} - 8\nu^{11} - 32\nu^{9} + 71\nu^{7} + 36\nu^{5} - 72\nu^{3} + 352\nu ) / 320 \) Copy content Toggle raw display
\(\beta_{12}\)\(=\) \( ( -5\nu^{14} + 16\nu^{10} + 35\nu^{6} + 144\nu^{2} ) / 320 \) Copy content Toggle raw display
\(\beta_{13}\)\(=\) \( ( 5\nu^{15} + 4\nu^{13} - 32\nu^{11} - 35\nu^{7} - 284\nu^{5} + 352\nu^{3} + 640\nu ) / 640 \) Copy content Toggle raw display
\(\beta_{14}\)\(=\) \( ( -5\nu^{15} - 8\nu^{13} + 35\nu^{7} - 72\nu^{5} ) / 640 \) Copy content Toggle raw display
\(\beta_{15}\)\(=\) \( ( -2\nu^{15} + 5\nu^{13} - 18\nu^{7} - 35\nu^{5} ) / 160 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{14} + \beta_{13} + \beta_{11} + \beta_{8} - \beta_{7} - 2\beta_{4} + 5\beta_1 ) / 10 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{12} + \beta_{10} + \beta_{3} ) / 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( \beta_{15} + 2\beta_{13} - 2\beta_{11} + 3\beta_{8} + 3\beta_{7} + 5\beta_{4} + 8\beta_1 ) / 10 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( \beta_{9} + \beta_{6} + 6\beta_{2} ) / 2 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -9\beta_{14} - 9\beta_{13} + \beta_{11} + 11\beta_{8} - \beta_{7} - 2\beta_{4} + 5\beta_1 ) / 10 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( -\beta_{12} + \beta_{10} + 10\beta_{5} - \beta_{3} ) / 2 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( -9\beta_{15} + 2\beta_{13} + 18\beta_{11} - 7\beta_{8} + 23\beta_{7} + 5\beta_{4} + 8\beta_1 ) / 10 \) Copy content Toggle raw display
\(\nu^{8}\)\(=\) \( ( -5\beta_{9} + 5\beta_{6} + 2 ) / 2 \) Copy content Toggle raw display
\(\nu^{9}\)\(=\) \( ( 10\beta_{15} - 9\beta_{14} + 11\beta_{13} - 29\beta_{11} + 21\beta_{8} + 39\beta_{7} - 32\beta_{4} + 35\beta_1 ) / 10 \) Copy content Toggle raw display
\(\nu^{10}\)\(=\) \( ( 11\beta_{12} + 11\beta_{10} - 29\beta_{3} ) / 2 \) Copy content Toggle raw display
\(\nu^{11}\)\(=\) \( ( -9\beta_{15} - 40\beta_{14} - 58\beta_{13} - 22\beta_{11} - 67\beta_{8} + 13\beta_{7} + 35\beta_{4} + 128\beta_1 ) / 10 \) Copy content Toggle raw display
\(\nu^{12}\)\(=\) \( ( -9\beta_{9} - 9\beta_{6} + 106\beta_{2} ) / 2 \) Copy content Toggle raw display
\(\nu^{13}\)\(=\) \( ( 160\beta_{15} - 319\beta_{14} + \beta_{13} + 71\beta_{11} - 19\beta_{8} + 89\beta_{7} + 18\beta_{4} + 35\beta_1 ) / 10 \) Copy content Toggle raw display
\(\nu^{14}\)\(=\) \( ( -71\beta_{12} + 71\beta_{10} + 70\beta_{5} - 71\beta_{3} ) / 2 \) Copy content Toggle raw display
\(\nu^{15}\)\(=\) \( ( - 319 \beta_{15} - 640 \beta_{14} + 142 \beta_{13} - 2 \beta_{11} - 177 \beta_{8} + 33 \beta_{7} + \cdots - 72 \beta_1 ) / 10 \) Copy content Toggle raw display

Character values

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

\(n\) \(301\) \(326\) \(352\)
\(\chi(n)\) \(-1\) \(-1\) \(\beta_{2}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
818.1
−1.15377 + 0.817807i
−1.39412 + 0.237563i
0.237563 + 1.39412i
0.817807 + 1.15377i
−0.817807 1.15377i
−0.237563 1.39412i
1.39412 0.237563i
1.15377 0.817807i
−1.15377 0.817807i
−1.39412 0.237563i
0.237563 1.39412i
0.817807 1.15377i
−0.817807 + 1.15377i
−0.237563 + 1.39412i
1.39412 + 0.237563i
1.15377 + 0.817807i
−1.97158 + 1.97158i −1.22474 1.22474i 5.77425i 0 4.82936 0 7.44124 + 7.44124i 3.00000i 0
818.2 −1.63168 + 1.63168i 1.22474 + 1.22474i 3.32476i 0 −3.99679 0 2.16159 + 2.16159i 3.00000i 0
818.3 −1.15655 + 1.15655i −1.22474 1.22474i 0.675235i 0 2.83297 0 −1.53216 1.53216i 3.00000i 0
818.4 −0.335965 + 0.335965i 1.22474 + 1.22474i 1.77425i 0 −0.822944 0 −1.26802 1.26802i 3.00000i 0
818.5 0.335965 0.335965i 1.22474 + 1.22474i 1.77425i 0 0.822944 0 1.26802 + 1.26802i 3.00000i 0
818.6 1.15655 1.15655i −1.22474 1.22474i 0.675235i 0 −2.83297 0 1.53216 + 1.53216i 3.00000i 0
818.7 1.63168 1.63168i 1.22474 + 1.22474i 3.32476i 0 3.99679 0 −2.16159 2.16159i 3.00000i 0
818.8 1.97158 1.97158i −1.22474 1.22474i 5.77425i 0 −4.82936 0 −7.44124 7.44124i 3.00000i 0
857.1 −1.97158 1.97158i −1.22474 + 1.22474i 5.77425i 0 4.82936 0 7.44124 7.44124i 3.00000i 0
857.2 −1.63168 1.63168i 1.22474 1.22474i 3.32476i 0 −3.99679 0 2.16159 2.16159i 3.00000i 0
857.3 −1.15655 1.15655i −1.22474 + 1.22474i 0.675235i 0 2.83297 0 −1.53216 + 1.53216i 3.00000i 0
857.4 −0.335965 0.335965i 1.22474 1.22474i 1.77425i 0 −0.822944 0 −1.26802 + 1.26802i 3.00000i 0
857.5 0.335965 + 0.335965i 1.22474 1.22474i 1.77425i 0 0.822944 0 1.26802 1.26802i 3.00000i 0
857.6 1.15655 + 1.15655i −1.22474 + 1.22474i 0.675235i 0 −2.83297 0 1.53216 1.53216i 3.00000i 0
857.7 1.63168 + 1.63168i 1.22474 1.22474i 3.32476i 0 3.99679 0 −2.16159 + 2.16159i 3.00000i 0
857.8 1.97158 + 1.97158i −1.22474 + 1.22474i 5.77425i 0 −4.82936 0 −7.44124 + 7.44124i 3.00000i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 818.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
39.d odd 2 1 CM by \(\Q(\sqrt{-39}) \)
3.b odd 2 1 inner
5.c odd 4 1 inner
13.b even 2 1 inner
15.e even 4 1 inner
65.h odd 4 1 inner
195.s even 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 975.2.s.c 16
3.b odd 2 1 inner 975.2.s.c 16
5.b even 2 1 195.2.s.a 16
5.c odd 4 1 195.2.s.a 16
5.c odd 4 1 inner 975.2.s.c 16
13.b even 2 1 inner 975.2.s.c 16
15.d odd 2 1 195.2.s.a 16
15.e even 4 1 195.2.s.a 16
15.e even 4 1 inner 975.2.s.c 16
39.d odd 2 1 CM 975.2.s.c 16
65.d even 2 1 195.2.s.a 16
65.h odd 4 1 195.2.s.a 16
65.h odd 4 1 inner 975.2.s.c 16
195.e odd 2 1 195.2.s.a 16
195.s even 4 1 195.2.s.a 16
195.s even 4 1 inner 975.2.s.c 16
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
195.2.s.a 16 5.b even 2 1
195.2.s.a 16 5.c odd 4 1
195.2.s.a 16 15.d odd 2 1
195.2.s.a 16 15.e even 4 1
195.2.s.a 16 65.d even 2 1
195.2.s.a 16 65.h odd 4 1
195.2.s.a 16 195.e odd 2 1
195.2.s.a 16 195.s even 4 1
975.2.s.c 16 1.a even 1 1 trivial
975.2.s.c 16 3.b odd 2 1 inner
975.2.s.c 16 5.c odd 4 1 inner
975.2.s.c 16 13.b even 2 1 inner
975.2.s.c 16 15.e even 4 1 inner
975.2.s.c 16 39.d odd 2 1 CM
975.2.s.c 16 65.h odd 4 1 inner
975.2.s.c 16 195.s even 4 1 inner

Hecke kernels

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

\( T_{2}^{16} + 96T_{2}^{12} + 2354T_{2}^{8} + 12384T_{2}^{4} + 625 \) Copy content Toggle raw display
\( T_{7} \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{16} + 96 T^{12} + \cdots + 625 \) Copy content Toggle raw display
$3$ \( (T^{4} + 9)^{4} \) Copy content Toggle raw display
$5$ \( T^{16} \) Copy content Toggle raw display
$7$ \( T^{16} \) Copy content Toggle raw display
$11$ \( (T^{8} - 88 T^{6} + \cdots + 36100)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 169)^{4} \) Copy content Toggle raw display
$17$ \( T^{16} \) Copy content Toggle raw display
$19$ \( T^{16} \) Copy content Toggle raw display
$23$ \( T^{16} \) Copy content Toggle raw display
$29$ \( T^{16} \) Copy content Toggle raw display
$31$ \( T^{16} \) Copy content Toggle raw display
$37$ \( T^{16} \) Copy content Toggle raw display
$41$ \( (T^{8} - 328 T^{6} + \cdots + 8584900)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} + 8 T^{3} + \cdots + 4900)^{4} \) Copy content Toggle raw display
$47$ \( T^{16} + \cdots + 364691589610000 \) Copy content Toggle raw display
$53$ \( T^{16} \) Copy content Toggle raw display
$59$ \( (T^{8} + 472 T^{6} + \cdots + 47748100)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} - 244 T^{2} + 4900)^{4} \) Copy content Toggle raw display
$67$ \( T^{16} \) Copy content Toggle raw display
$71$ \( (T^{8} - 568 T^{6} + \cdots + 14364100)^{2} \) Copy content Toggle raw display
$73$ \( T^{16} \) Copy content Toggle raw display
$79$ \( (T^{4} + 316 T^{2} + 2500)^{4} \) Copy content Toggle raw display
$83$ \( T^{16} + \cdots + 35\!\cdots\!00 \) Copy content Toggle raw display
$89$ \( (T^{8} + 712 T^{6} + \cdots + 91202500)^{2} \) Copy content Toggle raw display
$97$ \( T^{16} \) Copy content Toggle raw display
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