Properties

Label 256.10.b.g
Level $256$
Weight $10$
Character orbit 256.b
Analytic conductor $131.849$
Analytic rank $0$
Dimension $2$
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] = [256,10,Mod(129,256)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(256, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 1]))
 
N = Newforms(chi, 10, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("256.129");
 
S:= CuspForms(chi, 10);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 256 = 2^{8} \)
Weight: \( k \) \(=\) \( 10 \)
Character orbit: \([\chi]\) \(=\) 256.b (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: \(131.849174058\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{-1}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{13}]\)
Coefficient ring index: \( 2 \)
Twist minimal: no (minimal twist has level 2)
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 \(\beta = 2i\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + 78 \beta q^{3} + 435 \beta q^{5} + 952 q^{7} - 4653 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + 78 \beta q^{3} + 435 \beta q^{5} + 952 q^{7} - 4653 q^{9} - 28074 \beta q^{11} - 89047 \beta q^{13} - 135720 q^{15} - 247662 q^{17} - 157690 \beta q^{19} + 74256 \beta q^{21} - 204504 q^{23} + 1196225 q^{25} + 1172340 \beta q^{27} + 1920225 \beta q^{29} - 1309408 q^{31} + 8759088 q^{33} + 414120 \beta q^{35} + 2153539 \beta q^{37} + 27782664 q^{39} - 1512042 q^{41} + 16835302 \beta q^{43} - 2024055 \beta q^{45} - 10581072 q^{47} - 39447303 q^{49} - 19317636 \beta q^{51} + 8308107 \beta q^{53} + 48848760 q^{55} + 49199280 q^{57} + 56117550 \beta q^{59} + 16598609 \beta q^{61} - 4429656 q^{63} + 154941780 q^{65} + 60686126 \beta q^{67} - 15951312 \beta q^{69} + 387172728 q^{71} - 255240074 q^{73} + 93305550 \beta q^{75} - 26726448 \beta q^{77} + 492101840 q^{79} - 457355079 q^{81} + 228710118 \beta q^{83} - 107732970 \beta q^{85} - 599110200 q^{87} + 31809510 q^{89} - 84772744 \beta q^{91} - 102133824 \beta q^{93} + 274380600 q^{95} - 673532062 q^{97} + 130628322 \beta q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q + 1904 q^{7} - 9306 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 2 q + 1904 q^{7} - 9306 q^{9} - 271440 q^{15} - 495324 q^{17} - 409008 q^{23} + 2392450 q^{25} - 2618816 q^{31} + 17518176 q^{33} + 55565328 q^{39} - 3024084 q^{41} - 21162144 q^{47} - 78894606 q^{49} + 97697520 q^{55} + 98398560 q^{57} - 8859312 q^{63} + 309883560 q^{65} + 774345456 q^{71} - 510480148 q^{73} + 984203680 q^{79} - 914710158 q^{81} - 1198220400 q^{87} + 63619020 q^{89} + 548761200 q^{95} - 1347064124 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/256\mathbb{Z}\right)^\times\).

\(n\) \(5\) \(255\)
\(\chi(n)\) \(-1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
129.1
1.00000i
1.00000i
0 156.000i 0 870.000i 0 952.000 0 −4653.00 0
129.2 0 156.000i 0 870.000i 0 952.000 0 −4653.00 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 256.10.b.g 2
4.b odd 2 1 256.10.b.e 2
8.b even 2 1 inner 256.10.b.g 2
8.d odd 2 1 256.10.b.e 2
16.e even 4 1 2.10.a.a 1
16.e even 4 1 64.10.a.h 1
16.f odd 4 1 16.10.a.d 1
16.f odd 4 1 64.10.a.b 1
48.i odd 4 1 18.10.a.a 1
48.k even 4 1 144.10.a.d 1
80.i odd 4 1 50.10.b.a 2
80.j even 4 1 400.10.c.d 2
80.k odd 4 1 400.10.a.b 1
80.q even 4 1 50.10.a.c 1
80.s even 4 1 400.10.c.d 2
80.t odd 4 1 50.10.b.a 2
112.l odd 4 1 98.10.a.c 1
112.w even 12 2 98.10.c.c 2
112.x odd 12 2 98.10.c.b 2
144.w odd 12 2 162.10.c.i 2
144.x even 12 2 162.10.c.b 2
176.l odd 4 1 242.10.a.a 1
208.p even 4 1 338.10.a.a 1
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
2.10.a.a 1 16.e even 4 1
16.10.a.d 1 16.f odd 4 1
18.10.a.a 1 48.i odd 4 1
50.10.a.c 1 80.q even 4 1
50.10.b.a 2 80.i odd 4 1
50.10.b.a 2 80.t odd 4 1
64.10.a.b 1 16.f odd 4 1
64.10.a.h 1 16.e even 4 1
98.10.a.c 1 112.l odd 4 1
98.10.c.b 2 112.x odd 12 2
98.10.c.c 2 112.w even 12 2
144.10.a.d 1 48.k even 4 1
162.10.c.b 2 144.x even 12 2
162.10.c.i 2 144.w odd 12 2
242.10.a.a 1 176.l odd 4 1
256.10.b.e 2 4.b odd 2 1
256.10.b.e 2 8.d odd 2 1
256.10.b.g 2 1.a even 1 1 trivial
256.10.b.g 2 8.b even 2 1 inner
338.10.a.a 1 208.p even 4 1
400.10.a.b 1 80.k odd 4 1
400.10.c.d 2 80.j even 4 1
400.10.c.d 2 80.s even 4 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{10}^{\mathrm{new}}(256, [\chi])\):

\( T_{3}^{2} + 24336 \) Copy content Toggle raw display
\( T_{7} - 952 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} \) Copy content Toggle raw display
$3$ \( T^{2} + 24336 \) Copy content Toggle raw display
$5$ \( T^{2} + 756900 \) Copy content Toggle raw display
$7$ \( (T - 952)^{2} \) Copy content Toggle raw display
$11$ \( T^{2} + 3152597904 \) Copy content Toggle raw display
$13$ \( T^{2} + 31717472836 \) Copy content Toggle raw display
$17$ \( (T + 247662)^{2} \) Copy content Toggle raw display
$19$ \( T^{2} + 99464544400 \) Copy content Toggle raw display
$23$ \( (T + 204504)^{2} \) Copy content Toggle raw display
$29$ \( T^{2} + 14749056202500 \) Copy content Toggle raw display
$31$ \( (T + 1309408)^{2} \) Copy content Toggle raw display
$37$ \( T^{2} + 18550920898084 \) Copy content Toggle raw display
$41$ \( (T + 1512042)^{2} \) Copy content Toggle raw display
$43$ \( T^{2} + 11\!\cdots\!16 \) Copy content Toggle raw display
$47$ \( (T + 10581072)^{2} \) Copy content Toggle raw display
$53$ \( T^{2} + 276098567693796 \) Copy content Toggle raw display
$59$ \( T^{2} + 12\!\cdots\!00 \) Copy content Toggle raw display
$61$ \( T^{2} + 11\!\cdots\!24 \) Copy content Toggle raw display
$67$ \( T^{2} + 14\!\cdots\!04 \) Copy content Toggle raw display
$71$ \( (T - 387172728)^{2} \) Copy content Toggle raw display
$73$ \( (T + 255240074)^{2} \) Copy content Toggle raw display
$79$ \( (T - 492101840)^{2} \) Copy content Toggle raw display
$83$ \( T^{2} + 20\!\cdots\!96 \) Copy content Toggle raw display
$89$ \( (T - 31809510)^{2} \) Copy content Toggle raw display
$97$ \( (T + 673532062)^{2} \) Copy content Toggle raw display
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