Properties

Label 768.4.c.v
Level $768$
Weight $4$
Character orbit 768.c
Analytic conductor $45.313$
Analytic rank $0$
Dimension $16$
CM no
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [768,4,Mod(767,768)]
 
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([1, 0, 1]))
 
N = Newforms(chi, 4, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("768.767");
 
S:= CuspForms(chi, 4);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 768 = 2^{8} \cdot 3 \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 768.c (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: \(45.3134668844\)
Analytic rank: \(0\)
Dimension: \(16\)
Coefficient field: \(\mathbb{Q}[x]/(x^{16} - \cdots)\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{16} - 35x^{12} + 612x^{8} - 8960x^{4} + 65536 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{17}]\)
Coefficient ring index: \( 2^{50} \)
Twist minimal: no (minimal twist has level 24)
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 \(1,\beta_1,\ldots,\beta_{15}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_{4} q^{3} + \beta_{9} q^{5} + \beta_{6} q^{7} + ( - 3 \beta_{7} + 6) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_{4} q^{3} + \beta_{9} q^{5} + \beta_{6} q^{7} + ( - 3 \beta_{7} + 6) q^{9} + ( - \beta_{10} + \beta_{4} - \beta_{3}) q^{11} + \beta_{2} q^{13} - \beta_{13} q^{15} + (\beta_{11} - \beta_{8} - \beta_{7}) q^{17} + ( - 4 \beta_{4} - 4 \beta_{3} - 7 \beta_1) q^{19} + \beta_{14} q^{21} - \beta_{5} q^{23} + (\beta_{8} - \beta_{7} - 37) q^{25} + ( - 9 \beta_{10} - 3 \beta_{4} - 9 \beta_1) q^{27} + (\beta_{15} + \beta_{14} + \beta_{9}) q^{29} + (\beta_{13} + \beta_{12} + \beta_{6}) q^{31} + (\beta_{11} + 7 \beta_{8} + 2 \beta_{7} - 33) q^{33} + ( - 21 \beta_{10} + 2 \beta_{4} - 2 \beta_{3}) q^{35} + (\beta_{15} - \beta_{14} + 3 \beta_{2}) q^{37} + ( - \beta_{13} - 3 \beta_{6} + 3 \beta_{5}) q^{39} + (7 \beta_{11} + 16 \beta_{8} + 16 \beta_{7}) q^{41} + ( - 22 \beta_{4} - 22 \beta_{3} - 17 \beta_1) q^{43} + ( - 3 \beta_{15} + 6 \beta_{9} - 3 \beta_{2}) q^{45} + (5 \beta_{13} - 5 \beta_{12} - \beta_{5}) q^{47} + (23 \beta_{8} - 23 \beta_{7} - 119) q^{49} + (3 \beta_{10} + 8 \beta_{4} - 24 \beta_1) q^{51} + ( - 2 \beta_{15} - 2 \beta_{14} - 3 \beta_{9}) q^{53} + (\beta_{13} + \beta_{12} - 8 \beta_{6}) q^{55} + (7 \beta_{11} - 14 \beta_{8} + \cdots - 147) q^{57}+ \cdots + (12 \beta_{10} + 54 \beta_{4} + \cdots - 15 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 16 q + 96 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 16 q + 96 q^{9} - 592 q^{25} - 528 q^{33} - 1904 q^{49} - 2352 q^{57} - 2144 q^{73} - 1008 q^{81} - 7744 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{16} - 35x^{12} + 612x^{8} - 8960x^{4} + 65536 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( -\nu^{14} + 35\nu^{10} - 612\nu^{6} + 4864\nu^{2} ) / 2048 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -\nu^{14} + 19\nu^{10} + 204\nu^{6} - 5696\nu^{2} ) / 640 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( - 29 \nu^{15} - 132 \nu^{14} + 64 \nu^{13} + 631 \nu^{11} + 2572 \nu^{10} - 1216 \nu^{9} + \cdots - 331776 \nu ) / 81920 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 29 \nu^{15} - 132 \nu^{14} - 64 \nu^{13} - 631 \nu^{11} + 2572 \nu^{10} + 1216 \nu^{9} + \cdots + 331776 \nu ) / 81920 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( \nu^{15} + 4\nu^{13} + 61\nu^{11} - 396\nu^{9} - 1724\nu^{7} + 5264\nu^{5} + 9856\nu^{3} + 6144\nu ) / 2560 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 25\nu^{12} - 491\nu^{8} + 8260\nu^{4} - 106496 ) / 640 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( - 33 \nu^{15} - 112 \nu^{13} - 64 \nu^{12} + 643 \nu^{11} + 1872 \nu^{9} + 2240 \nu^{8} + \cdots + 286720 ) / 40960 \) Copy content Toggle raw display
\(\beta_{8}\)\(=\) \( ( - 33 \nu^{15} - 112 \nu^{13} + 64 \nu^{12} + 643 \nu^{11} + 1872 \nu^{9} - 2240 \nu^{8} + \cdots - 286720 ) / 40960 \) Copy content Toggle raw display
\(\beta_{9}\)\(=\) \( ( 21 \nu^{15} + 120 \nu^{13} - 415 \nu^{11} - 2664 \nu^{9} + 7796 \nu^{7} + 40160 \nu^{5} + \cdots - 507904 \nu ) / 20480 \) Copy content Toggle raw display
\(\beta_{10}\)\(=\) \( ( - 33 \nu^{15} + 112 \nu^{13} + 643 \nu^{11} - 1872 \nu^{9} - 10468 \nu^{7} + 29632 \nu^{5} + \cdots - 356352 \nu ) / 20480 \) Copy content Toggle raw display
\(\beta_{11}\)\(=\) \( ( - 29 \nu^{15} - 64 \nu^{13} + 631 \nu^{11} + 1216 \nu^{9} - 8404 \nu^{7} - 27904 \nu^{5} + \cdots + 331776 \nu ) / 10240 \) Copy content Toggle raw display
\(\beta_{12}\)\(=\) \( ( - 11 \nu^{15} + 58 \nu^{13} - 140 \nu^{12} + 177 \nu^{11} - 1134 \nu^{9} + 2340 \nu^{8} + \cdots + 471040 ) / 2560 \) Copy content Toggle raw display
\(\beta_{13}\)\(=\) \( ( 11 \nu^{15} - 58 \nu^{13} - 140 \nu^{12} - 177 \nu^{11} + 1134 \nu^{9} + 2340 \nu^{8} + 3036 \nu^{7} + \cdots + 471040 ) / 2560 \) Copy content Toggle raw display
\(\beta_{14}\)\(=\) \( ( 113 \nu^{15} + 112 \nu^{14} + 568 \nu^{13} - 1587 \nu^{11} - 3408 \nu^{10} - 10152 \nu^{9} + \cdots - 2588672 \nu ) / 20480 \) Copy content Toggle raw display
\(\beta_{15}\)\(=\) \( ( 113 \nu^{15} - 112 \nu^{14} + 568 \nu^{13} - 1587 \nu^{11} + 3408 \nu^{10} - 10152 \nu^{9} + \cdots - 2588672 \nu ) / 20480 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( -\beta_{15} - \beta_{14} + \beta_{13} - \beta_{12} + 8\beta_{10} + 2\beta_{9} - 8\beta_{8} - 8\beta_{7} + \beta_{5} ) / 128 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{15} - \beta_{14} - 2\beta_{2} - 16\beta_1 ) / 64 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( \beta_{15} + \beta_{14} + 5 \beta_{13} - 5 \beta_{12} - 8 \beta_{11} + 40 \beta_{10} + \cdots - 32 \beta_{3} ) / 128 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( 3\beta_{13} + 3\beta_{12} - 20\beta_{8} + 20\beta_{7} + 10\beta_{6} + 280 ) / 32 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( - 11 \beta_{15} - 11 \beta_{14} + 15 \beta_{13} - 15 \beta_{12} - 72 \beta_{11} + \cdots + 288 \beta_{3} ) / 128 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( 19\beta_{15} - 19\beta_{14} - 40\beta_{4} - 40\beta_{3} + 42\beta_{2} - 296\beta_1 ) / 64 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( - 9 \beta_{15} - 9 \beta_{14} + 91 \beta_{13} - 91 \beta_{12} + 120 \beta_{11} + 248 \beta_{10} + \cdots + 480 \beta_{3} ) / 128 \) Copy content Toggle raw display
\(\nu^{8}\)\(=\) \( ( 5\beta_{13} + 5\beta_{12} - 700\beta_{8} + 700\beta_{7} + 70\beta_{6} + 8 ) / 32 \) Copy content Toggle raw display
\(\nu^{9}\)\(=\) \( ( 51 \beta_{15} + 51 \beta_{14} + 249 \beta_{13} - 249 \beta_{12} - 920 \beta_{11} + \cdots + 3680 \beta_{3} ) / 128 \) Copy content Toggle raw display
\(\nu^{10}\)\(=\) \( ( 309\beta_{15} - 309\beta_{14} - 2040\beta_{4} - 2040\beta_{3} + 902\beta_{2} + 3656\beta_1 ) / 64 \) Copy content Toggle raw display
\(\nu^{11}\)\(=\) \( ( 609 \beta_{15} + 609 \beta_{14} + 1405 \beta_{13} - 1405 \beta_{12} + 4488 \beta_{11} + \cdots + 17952 \beta_{3} ) / 128 \) Copy content Toggle raw display
\(\nu^{12}\)\(=\) \( ( -893\beta_{13} - 893\beta_{12} - 7140\beta_{8} + 7140\beta_{7} - 1110\beta_{6} + 43960 ) / 32 \) Copy content Toggle raw display
\(\nu^{13}\)\(=\) \( ( 581 \beta_{15} + 581 \beta_{14} + 3375 \beta_{13} - 3375 \beta_{12} + 3672 \beta_{11} + \cdots - 14688 \beta_{3} ) / 128 \) Copy content Toggle raw display
\(\nu^{14}\)\(=\) \( ( 4051\beta_{15} - 4051\beta_{14} - 46920\beta_{4} - 46920\beta_{3} - 3862\beta_{2} + 100216\beta_1 ) / 64 \) Copy content Toggle raw display
\(\nu^{15}\)\(=\) \( ( 19399 \beta_{15} + 19399 \beta_{14} + 21899 \beta_{13} - 21899 \beta_{12} + 11960 \beta_{11} + \cdots + 47840 \beta_{3} ) / 128 \) 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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
767.1
1.86600 0.719760i
−0.719760 + 1.86600i
−0.719760 1.86600i
1.86600 + 0.719760i
−0.0465478 + 1.99946i
−1.99946 + 0.0465478i
−1.99946 0.0465478i
−0.0465478 1.99946i
1.99946 0.0465478i
0.0465478 1.99946i
0.0465478 + 1.99946i
1.99946 + 0.0465478i
0.719760 1.86600i
−1.86600 + 0.719760i
−1.86600 0.719760i
0.719760 + 1.86600i
0 −5.01167 1.37228i 0 12.2683i 0 14.0624i 0 23.2337 + 13.7548i 0
767.2 0 −5.01167 1.37228i 0 12.2683i 0 14.0624i 0 23.2337 + 13.7548i 0
767.3 0 −5.01167 + 1.37228i 0 12.2683i 0 14.0624i 0 23.2337 13.7548i 0
767.4 0 −5.01167 + 1.37228i 0 12.2683i 0 14.0624i 0 23.2337 13.7548i 0
767.5 0 −2.80770 4.37228i 0 13.1715i 0 26.9490i 0 −11.2337 + 24.5521i 0
767.6 0 −2.80770 4.37228i 0 13.1715i 0 26.9490i 0 −11.2337 + 24.5521i 0
767.7 0 −2.80770 + 4.37228i 0 13.1715i 0 26.9490i 0 −11.2337 24.5521i 0
767.8 0 −2.80770 + 4.37228i 0 13.1715i 0 26.9490i 0 −11.2337 24.5521i 0
767.9 0 2.80770 4.37228i 0 13.1715i 0 26.9490i 0 −11.2337 24.5521i 0
767.10 0 2.80770 4.37228i 0 13.1715i 0 26.9490i 0 −11.2337 24.5521i 0
767.11 0 2.80770 + 4.37228i 0 13.1715i 0 26.9490i 0 −11.2337 + 24.5521i 0
767.12 0 2.80770 + 4.37228i 0 13.1715i 0 26.9490i 0 −11.2337 + 24.5521i 0
767.13 0 5.01167 1.37228i 0 12.2683i 0 14.0624i 0 23.2337 13.7548i 0
767.14 0 5.01167 1.37228i 0 12.2683i 0 14.0624i 0 23.2337 13.7548i 0
767.15 0 5.01167 + 1.37228i 0 12.2683i 0 14.0624i 0 23.2337 + 13.7548i 0
767.16 0 5.01167 + 1.37228i 0 12.2683i 0 14.0624i 0 23.2337 + 13.7548i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 767.16
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 inner
4.b odd 2 1 inner
8.b even 2 1 inner
8.d odd 2 1 inner
12.b even 2 1 inner
24.f even 2 1 inner
24.h odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 768.4.c.v 16
3.b odd 2 1 inner 768.4.c.v 16
4.b odd 2 1 inner 768.4.c.v 16
8.b even 2 1 inner 768.4.c.v 16
8.d odd 2 1 inner 768.4.c.v 16
12.b even 2 1 inner 768.4.c.v 16
16.e even 4 1 24.4.f.b 8
16.e even 4 1 96.4.f.b 8
16.f odd 4 1 24.4.f.b 8
16.f odd 4 1 96.4.f.b 8
24.f even 2 1 inner 768.4.c.v 16
24.h odd 2 1 inner 768.4.c.v 16
48.i odd 4 1 24.4.f.b 8
48.i odd 4 1 96.4.f.b 8
48.k even 4 1 24.4.f.b 8
48.k even 4 1 96.4.f.b 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
24.4.f.b 8 16.e even 4 1
24.4.f.b 8 16.f odd 4 1
24.4.f.b 8 48.i odd 4 1
24.4.f.b 8 48.k even 4 1
96.4.f.b 8 16.e even 4 1
96.4.f.b 8 16.f odd 4 1
96.4.f.b 8 48.i odd 4 1
96.4.f.b 8 48.k even 4 1
768.4.c.v 16 1.a even 1 1 trivial
768.4.c.v 16 3.b odd 2 1 inner
768.4.c.v 16 4.b odd 2 1 inner
768.4.c.v 16 8.b even 2 1 inner
768.4.c.v 16 8.d odd 2 1 inner
768.4.c.v 16 12.b even 2 1 inner
768.4.c.v 16 24.f even 2 1 inner
768.4.c.v 16 24.h odd 2 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(768, [\chi])\):

\( T_{5}^{4} + 324T_{5}^{2} + 26112 \) Copy content Toggle raw display
\( T_{7}^{4} + 924T_{7}^{2} + 143616 \) Copy content Toggle raw display
\( T_{11}^{4} - 484T_{11}^{2} + 352 \) Copy content Toggle raw display
\( T_{13}^{4} - 5808T_{13}^{2} + 574464 \) Copy content Toggle raw display
\( T_{23}^{4} - 17472T_{23}^{2} + 1671168 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{16} \) Copy content Toggle raw display
$3$ \( (T^{8} - 24 T^{6} + \cdots + 531441)^{2} \) Copy content Toggle raw display
$5$ \( (T^{4} + 324 T^{2} + 26112)^{4} \) Copy content Toggle raw display
$7$ \( (T^{4} + 924 T^{2} + 143616)^{4} \) Copy content Toggle raw display
$11$ \( (T^{4} - 484 T^{2} + 352)^{4} \) Copy content Toggle raw display
$13$ \( (T^{4} - 5808 T^{2} + 574464)^{4} \) Copy content Toggle raw display
$17$ \( (T^{4} + 2464 T^{2} + 90112)^{4} \) Copy content Toggle raw display
$19$ \( (T^{4} + 9044 T^{2} + 11999296)^{4} \) Copy content Toggle raw display
$23$ \( (T^{4} - 17472 T^{2} + 1671168)^{4} \) Copy content Toggle raw display
$29$ \( (T^{4} + 43620 T^{2} + 448108032)^{4} \) Copy content Toggle raw display
$31$ \( (T^{4} + 20988 T^{2} + 41505024)^{4} \) Copy content Toggle raw display
$37$ \( (T^{4} - 77616 T^{2} + 1494180864)^{4} \) Copy content Toggle raw display
$41$ \( (T^{4} + 193600 T^{2} + 3151126528)^{4} \) Copy content Toggle raw display
$43$ \( (T^{4} + 101108 T^{2} + 2483228224)^{4} \) Copy content Toggle raw display
$47$ \( (T^{4} - 321792 T^{2} + 427819008)^{4} \) Copy content Toggle raw display
$53$ \( (T^{4} + 177156 T^{2} + 7033554432)^{4} \) Copy content Toggle raw display
$59$ \( (T^{4} - 21604 T^{2} + 296032)^{4} \) Copy content Toggle raw display
$61$ \( (T^{4} - 550704 T^{2} + 18820015104)^{4} \) Copy content Toggle raw display
$67$ \( (T^{4} + 75284 T^{2} + 1043031616)^{4} \) Copy content Toggle raw display
$71$ \( (T^{4} - 654912 T^{2} + 103614087168)^{4} \) Copy content Toggle raw display
$73$ \( (T^{2} + 268 T - 704876)^{8} \) Copy content Toggle raw display
$79$ \( (T^{4} + 1028412 T^{2} + 99653562624)^{4} \) Copy content Toggle raw display
$83$ \( (T^{4} - 396484 T^{2} + 2128431712)^{4} \) Copy content Toggle raw display
$89$ \( (T^{4} + 2644576 T^{2} + 147293673472)^{4} \) Copy content Toggle raw display
$97$ \( (T^{2} + 968 T - 33044)^{8} \) Copy content Toggle raw display
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