Properties

Label 768.6.d.s
Level $768$
Weight $6$
Character orbit 768.d
Analytic conductor $123.175$
Analytic rank $0$
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] = [768,6,Mod(385,768)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(768, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 1, 0]))
 
N = Newforms(chi, 6, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("768.385");
 
S:= CuspForms(chi, 6);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 768 = 2^{8} \cdot 3 \)
Weight: \( k \) \(=\) \( 6 \)
Character orbit: \([\chi]\) \(=\) 768.d (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: \(123.174773616\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\Q(i, \sqrt{31})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - 15x^{2} + 64 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{10} \)
Twist minimal: no (minimal twist has level 96)
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.

\(f(q)\) \(=\) \( q - 9 \beta_1 q^{3} + (\beta_{3} + 18 \beta_1) q^{5} + ( - \beta_{2} - 60) q^{7} - 81 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - 9 \beta_1 q^{3} + (\beta_{3} + 18 \beta_1) q^{5} + ( - \beta_{2} - 60) q^{7} - 81 q^{9} + ( - 6 \beta_{3} + 100 \beta_1) q^{11} + (6 \beta_{3} - 142 \beta_1) q^{13} + (9 \beta_{2} + 162) q^{15} + ( - 6 \beta_{2} + 1338) q^{17} + ( - 10 \beta_{3} + 36 \beta_1) q^{19} + (9 \beta_{3} + 540 \beta_1) q^{21} + (30 \beta_{2} + 1920) q^{23} + ( - 36 \beta_{2} - 5135) q^{25} + 729 \beta_1 q^{27} + ( - 19 \beta_{3} - 5106 \beta_1) q^{29} + (5 \beta_{2} - 5244) q^{31} + ( - 54 \beta_{2} + 900) q^{33} + ( - 78 \beta_{3} - 9016 \beta_1) q^{35} + ( - 84 \beta_{3} + 6574 \beta_1) q^{37} + (54 \beta_{2} - 1278) q^{39} + (50 \beta_{2} - 2082) q^{41} + ( - 130 \beta_{3} + 2916 \beta_1) q^{43} + ( - 81 \beta_{3} - 1458 \beta_1) q^{45} + (198 \beta_{2} - 760) q^{47} + (120 \beta_{2} - 5271) q^{49} + (54 \beta_{3} - 12042 \beta_1) q^{51} + (71 \beta_{3} + 4506 \beta_1) q^{53} + (8 \beta_{2} + 45816) q^{55} + ( - 90 \beta_{2} + 324) q^{57} + ( - 216 \beta_{3} + 27548 \beta_1) q^{59} + (48 \beta_{3} + 31722 \beta_1) q^{61} + (81 \beta_{2} + 4860) q^{63} + (34 \beta_{2} - 45060) q^{65} + ( - 488 \beta_{3} + 18396 \beta_1) q^{67} + ( - 270 \beta_{3} - 17280 \beta_1) q^{69} + (438 \beta_{2} + 18832) q^{71} + (552 \beta_{2} + 18918) q^{73} + (324 \beta_{3} + 46215 \beta_1) q^{75} + (260 \beta_{3} + 41616 \beta_1) q^{77} + ( - 295 \beta_{2} - 72444) q^{79} + 6561 q^{81} + (222 \beta_{3} - 54636 \beta_1) q^{83} + (1230 \beta_{3} - 23532 \beta_1) q^{85} + ( - 171 \beta_{2} - 45954) q^{87} + ( - 572 \beta_{2} + 16278) q^{89} + ( - 218 \beta_{3} - 39096 \beta_1) q^{91} + ( - 45 \beta_{3} + 47196 \beta_1) q^{93} + (144 \beta_{2} + 78712) q^{95} + (60 \beta_{2} + 34546) q^{97} + (486 \beta_{3} - 8100 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 240 q^{7} - 324 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 4 q - 240 q^{7} - 324 q^{9} + 648 q^{15} + 5352 q^{17} + 7680 q^{23} - 20540 q^{25} - 20976 q^{31} + 3600 q^{33} - 5112 q^{39} - 8328 q^{41} - 3040 q^{47} - 21084 q^{49} + 183264 q^{55} + 1296 q^{57} + 19440 q^{63} - 180240 q^{65} + 75328 q^{71} + 75672 q^{73} - 289776 q^{79} + 26244 q^{81} - 183816 q^{87} + 65112 q^{89} + 314848 q^{95} + 138184 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} - 15x^{2} + 64 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{3} - 7\nu ) / 8 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( -2\nu^{3} + 46\nu \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( 32\nu^{2} - 240 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{2} + 16\beta_1 ) / 32 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{3} + 240 ) / 32 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 7\beta_{2} + 368\beta_1 ) / 32 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/768\mathbb{Z}\right)^\times\).

\(n\) \(257\) \(511\) \(517\)
\(\chi(n)\) \(1\) \(1\) \(-1\)

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.

comment: embeddings in the coefficient field
 
gp: mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
385.1
−2.78388 + 0.500000i
2.78388 + 0.500000i
2.78388 0.500000i
−2.78388 0.500000i
0 9.00000i 0 71.0842i 0 29.0842 0 −81.0000 0
385.2 0 9.00000i 0 107.084i 0 −149.084 0 −81.0000 0
385.3 0 9.00000i 0 107.084i 0 −149.084 0 −81.0000 0
385.4 0 9.00000i 0 71.0842i 0 29.0842 0 −81.0000 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
8.b even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 768.6.d.s 4
4.b odd 2 1 768.6.d.z 4
8.b even 2 1 inner 768.6.d.s 4
8.d odd 2 1 768.6.d.z 4
16.e even 4 1 96.6.a.h yes 2
16.e even 4 1 192.6.a.q 2
16.f odd 4 1 96.6.a.g 2
16.f odd 4 1 192.6.a.r 2
48.i odd 4 1 288.6.a.o 2
48.i odd 4 1 576.6.a.bn 2
48.k even 4 1 288.6.a.n 2
48.k even 4 1 576.6.a.bm 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
96.6.a.g 2 16.f odd 4 1
96.6.a.h yes 2 16.e even 4 1
192.6.a.q 2 16.e even 4 1
192.6.a.r 2 16.f odd 4 1
288.6.a.n 2 48.k even 4 1
288.6.a.o 2 48.i odd 4 1
576.6.a.bm 2 48.k even 4 1
576.6.a.bn 2 48.i odd 4 1
768.6.d.s 4 1.a even 1 1 trivial
768.6.d.s 4 8.b even 2 1 inner
768.6.d.z 4 4.b odd 2 1
768.6.d.z 4 8.d odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{6}^{\mathrm{new}}(768, [\chi])\):

\( T_{5}^{4} + 16520T_{5}^{2} + 57942544 \) Copy content Toggle raw display
\( T_{7}^{2} + 120T_{7} - 4336 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( (T^{2} + 81)^{2} \) Copy content Toggle raw display
$5$ \( T^{4} + 16520 T^{2} + 57942544 \) Copy content Toggle raw display
$7$ \( (T^{2} + 120 T - 4336)^{2} \) Copy content Toggle raw display
$11$ \( T^{4} + \cdots + 76008284416 \) Copy content Toggle raw display
$13$ \( T^{4} + \cdots + 70507243024 \) Copy content Toggle raw display
$17$ \( (T^{2} - 2676 T + 1504548)^{2} \) Copy content Toggle raw display
$19$ \( T^{4} + \cdots + 627745628416 \) Copy content Toggle raw display
$23$ \( (T^{2} - 3840 T - 3456000)^{2} \) Copy content Toggle raw display
$29$ \( T^{4} + \cdots + 538534216195600 \) Copy content Toggle raw display
$31$ \( (T^{2} + 10488 T + 27301136)^{2} \) Copy content Toggle raw display
$37$ \( T^{4} + \cdots + 163301307523600 \) Copy content Toggle raw display
$41$ \( (T^{2} + 4164 T - 15505276)^{2} \) Copy content Toggle raw display
$43$ \( T^{4} + \cdots + 15\!\cdots\!36 \) Copy content Toggle raw display
$47$ \( (T^{2} + 1520 T - 310545344)^{2} \) Copy content Toggle raw display
$53$ \( T^{4} + \cdots + 388142797795600 \) Copy content Toggle raw display
$59$ \( T^{4} + \cdots + 15\!\cdots\!44 \) Copy content Toggle raw display
$61$ \( T^{4} + \cdots + 97\!\cdots\!00 \) Copy content Toggle raw display
$67$ \( T^{4} + \cdots + 24\!\cdots\!24 \) Copy content Toggle raw display
$71$ \( (T^{2} - 37664 T - 1167829760)^{2} \) Copy content Toggle raw display
$73$ \( (T^{2} - 37836 T - 2060240220)^{2} \) Copy content Toggle raw display
$79$ \( (T^{2} + 144888 T + 4557502736)^{2} \) Copy content Toggle raw display
$83$ \( T^{4} + \cdots + 67\!\cdots\!84 \) Copy content Toggle raw display
$89$ \( (T^{2} - 32556 T - 2331558940)^{2} \) Copy content Toggle raw display
$97$ \( (T^{2} - 69092 T + 1164856516)^{2} \) Copy content Toggle raw display
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