Properties

Label 850.2.o.c
Level $850$
Weight $2$
Character orbit 850.o
Analytic conductor $6.787$
Analytic rank $0$
Dimension $8$
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] = [850,2,Mod(49,850)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(850, base_ring=CyclotomicField(8))
 
chi = DirichletCharacter(H, H._module([4, 3]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("850.49");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 850 = 2 \cdot 5^{2} \cdot 17 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 850.o (of order \(8\), degree \(4\), 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: \(6.78728417181\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(2\) over \(\Q(\zeta_{8})\)
Coefficient field: \(\Q(\zeta_{16})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 1 \) 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 170)
Sato-Tate group: $\mathrm{SU}(2)[C_{8}]$

$q$-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 primitive root of unity \(\zeta_{16}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \zeta_{16}^{6} q^{2} + ( - \zeta_{16}^{6} + \zeta_{16}^{5} + \cdots - 1) q^{3}+ \cdots + ( - 2 \zeta_{16}^{7} + 2 \zeta_{16}^{6} + \cdots - 1) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \zeta_{16}^{6} q^{2} + ( - \zeta_{16}^{6} + \zeta_{16}^{5} + \cdots - 1) q^{3}+ \cdots + ( - 10 \zeta_{16}^{7} + 9 \zeta_{16}^{6} + \cdots - 9) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 8 q^{3} - 8 q^{7} - 8 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 8 q^{3} - 8 q^{7} - 8 q^{9} + 16 q^{11} + 24 q^{13} + 8 q^{14} - 8 q^{16} + 16 q^{19} - 16 q^{22} - 8 q^{23} + 8 q^{24} + 40 q^{27} - 8 q^{29} - 16 q^{31} + 8 q^{36} - 32 q^{37} - 24 q^{38} - 32 q^{39} - 8 q^{43} + 8 q^{44} - 8 q^{46} + 8 q^{47} + 8 q^{48} + 8 q^{49} - 40 q^{51} + 8 q^{53} - 40 q^{54} + 16 q^{57} - 8 q^{58} + 40 q^{59} - 24 q^{61} + 8 q^{62} + 8 q^{63} + 16 q^{66} + 16 q^{69} + 24 q^{71} - 16 q^{72} + 16 q^{73} - 8 q^{74} + 16 q^{76} - 8 q^{77} + 24 q^{78} + 8 q^{79} - 8 q^{83} - 16 q^{84} - 16 q^{86} + 32 q^{87} + 8 q^{88} - 8 q^{91} + 24 q^{92} - 32 q^{93} + 8 q^{94} + 16 q^{97} + 24 q^{98} - 72 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/850\mathbb{Z}\right)^\times\).

\(n\) \(477\) \(751\)
\(\chi(n)\) \(-1\) \(-\zeta_{16}^{6}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
49.1
−0.382683 + 0.923880i
0.382683 0.923880i
−0.923880 + 0.382683i
0.923880 0.382683i
−0.382683 0.923880i
0.382683 + 0.923880i
−0.923880 0.382683i
0.923880 + 0.382683i
0.707107 0.707107i −2.08979 + 0.865619i 1.00000i 0 −0.865619 + 2.08979i −0.834089 + 2.01367i −0.707107 0.707107i 1.49661 1.49661i 0
49.2 0.707107 0.707107i −1.32442 + 0.548594i 1.00000i 0 −0.548594 + 1.32442i 0.248303 0.599456i −0.707107 0.707107i −0.668179 + 0.668179i 0
349.1 −0.707107 0.707107i −1.21677 + 2.93755i 1.00000i 0 2.93755 1.21677i −0.400544 + 0.165911i 0.707107 0.707107i −5.02734 5.02734i 0
349.2 −0.707107 0.707107i 0.630986 1.52334i 1.00000i 0 −1.52334 + 0.630986i −3.01367 + 1.24830i 0.707107 0.707107i 0.198912 + 0.198912i 0
399.1 0.707107 + 0.707107i −2.08979 0.865619i 1.00000i 0 −0.865619 2.08979i −0.834089 2.01367i −0.707107 + 0.707107i 1.49661 + 1.49661i 0
399.2 0.707107 + 0.707107i −1.32442 0.548594i 1.00000i 0 −0.548594 1.32442i 0.248303 + 0.599456i −0.707107 + 0.707107i −0.668179 0.668179i 0
699.1 −0.707107 + 0.707107i −1.21677 2.93755i 1.00000i 0 2.93755 + 1.21677i −0.400544 0.165911i 0.707107 + 0.707107i −5.02734 + 5.02734i 0
699.2 −0.707107 + 0.707107i 0.630986 + 1.52334i 1.00000i 0 −1.52334 0.630986i −3.01367 1.24830i 0.707107 + 0.707107i 0.198912 0.198912i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 49.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
85.m even 8 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 850.2.o.c 8
5.b even 2 1 850.2.o.f 8
5.c odd 4 1 170.2.k.a 8
5.c odd 4 1 850.2.l.d 8
17.d even 8 1 850.2.o.f 8
85.k odd 8 1 850.2.l.d 8
85.m even 8 1 inner 850.2.o.c 8
85.n odd 8 1 170.2.k.a 8
85.r even 16 1 2890.2.a.bc 4
85.r even 16 1 2890.2.a.bf 4
85.r even 16 2 2890.2.b.p 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
170.2.k.a 8 5.c odd 4 1
170.2.k.a 8 85.n odd 8 1
850.2.l.d 8 5.c odd 4 1
850.2.l.d 8 85.k odd 8 1
850.2.o.c 8 1.a even 1 1 trivial
850.2.o.c 8 85.m even 8 1 inner
850.2.o.f 8 5.b even 2 1
850.2.o.f 8 17.d even 8 1
2890.2.a.bc 4 85.r even 16 1
2890.2.a.bf 4 85.r even 16 1
2890.2.b.p 8 85.r even 16 2

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{8} + 8T_{3}^{7} + 36T_{3}^{6} + 104T_{3}^{5} + 200T_{3}^{4} + 304T_{3}^{3} + 468T_{3}^{2} + 544T_{3} + 289 \) acting on \(S_{2}^{\mathrm{new}}(850, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} + 1)^{2} \) Copy content Toggle raw display
$3$ \( T^{8} + 8 T^{7} + \cdots + 289 \) Copy content Toggle raw display
$5$ \( T^{8} \) Copy content Toggle raw display
$7$ \( T^{8} + 8 T^{7} + \cdots + 4 \) Copy content Toggle raw display
$11$ \( T^{8} - 16 T^{7} + \cdots + 51076 \) Copy content Toggle raw display
$13$ \( (T^{4} - 12 T^{3} + \cdots + 17)^{2} \) Copy content Toggle raw display
$17$ \( T^{8} + 48 T^{6} + \cdots + 83521 \) Copy content Toggle raw display
$19$ \( T^{8} - 16 T^{7} + \cdots + 452929 \) Copy content Toggle raw display
$23$ \( T^{8} + 8 T^{7} + \cdots + 3182656 \) Copy content Toggle raw display
$29$ \( T^{8} + 8 T^{7} + \cdots + 289 \) Copy content Toggle raw display
$31$ \( T^{8} + 16 T^{7} + \cdots + 277729 \) Copy content Toggle raw display
$37$ \( (T^{4} + 16 T^{3} + \cdots + 98)^{2} \) Copy content Toggle raw display
$41$ \( T^{8} + 68 T^{6} + \cdots + 1156 \) Copy content Toggle raw display
$43$ \( T^{8} + 8 T^{7} + \cdots + 4 \) Copy content Toggle raw display
$47$ \( (T^{4} - 4 T^{3} - 34 T^{2} + \cdots - 17)^{2} \) Copy content Toggle raw display
$53$ \( T^{8} - 8 T^{7} + \cdots + 1 \) Copy content Toggle raw display
$59$ \( T^{8} - 40 T^{7} + \cdots + 113569 \) Copy content Toggle raw display
$61$ \( T^{8} + 24 T^{7} + \cdots + 6723649 \) Copy content Toggle raw display
$67$ \( T^{8} + 112 T^{6} + \cdots + 61504 \) Copy content Toggle raw display
$71$ \( T^{8} - 24 T^{7} + \cdots + 8025889 \) Copy content Toggle raw display
$73$ \( T^{8} - 16 T^{7} + \cdots + 57121 \) Copy content Toggle raw display
$79$ \( T^{8} - 8 T^{7} + \cdots + 35344 \) Copy content Toggle raw display
$83$ \( T^{8} + 8 T^{7} + \cdots + 9604 \) Copy content Toggle raw display
$89$ \( T^{8} + 260 T^{6} + \cdots + 1324801 \) Copy content Toggle raw display
$97$ \( T^{8} - 16 T^{7} + \cdots + 16394401 \) Copy content Toggle raw display
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