Properties

Label 847.2.n.a
Level $847$
Weight $2$
Character orbit 847.n
Analytic conductor $6.763$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [847,2,Mod(9,847)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(847, base_ring=CyclotomicField(30))
 
chi = DirichletCharacter(H, H._module([10, 18]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("847.9");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 847 = 7 \cdot 11^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 847.n (of order \(15\), degree \(8\), 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: \(6.76332905120\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: \(\Q(\zeta_{15})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{7} + x^{5} - x^{4} + x^{3} - x + 1 \) 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 77)
Sato-Tate group: $\mathrm{SU}(2)[C_{15}]$

$q$-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 \(\zeta_{15}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (\zeta_{15}^{7} - \zeta_{15}^{5} - 1) q^{2} + (\zeta_{15}^{7} - \zeta_{15}^{5} + \cdots - 1) q^{3}+ \cdots - 2 \zeta_{15} q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q + (\zeta_{15}^{7} - \zeta_{15}^{5} - 1) q^{2} + (\zeta_{15}^{7} - \zeta_{15}^{5} + \cdots - 1) q^{3}+ \cdots + (5 \zeta_{15}^{7} + 8 \zeta_{15}^{4} + \cdots - 5) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 3 q^{2} + q^{3} - 3 q^{4} + 5 q^{5} + 6 q^{6} + 5 q^{7} + 10 q^{8} - 2 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 3 q^{2} + q^{3} - 3 q^{4} + 5 q^{5} + 6 q^{6} + 5 q^{7} + 10 q^{8} - 2 q^{9} + 10 q^{10} + 2 q^{12} - 20 q^{13} - 2 q^{14} + 10 q^{15} - 9 q^{16} - 6 q^{17} - 4 q^{18} - 12 q^{19} + 16 q^{21} + 16 q^{23} + 5 q^{24} + 5 q^{26} + 10 q^{27} - 8 q^{28} + 6 q^{29} + 3 q^{31} - 18 q^{32} + 24 q^{34} - 5 q^{35} - 12 q^{36} + 12 q^{37} + 6 q^{38} + 10 q^{39} + 5 q^{40} - 12 q^{41} - 15 q^{42} - 28 q^{43} + 7 q^{46} - 14 q^{47} - 12 q^{48} - 11 q^{49} + 4 q^{51} + 13 q^{53} - 10 q^{54} - 6 q^{57} + 9 q^{58} + 12 q^{59} + 22 q^{61} - 22 q^{62} + 2 q^{63} - 14 q^{64} - 30 q^{65} - 38 q^{67} - 2 q^{68} + 18 q^{69} + 4 q^{71} - 10 q^{72} - q^{74} + 48 q^{76} - 40 q^{78} + 21 q^{79} + q^{81} - 8 q^{82} - 18 q^{83} + 3 q^{84} + 3 q^{86} - 18 q^{87} - 24 q^{89} - 20 q^{90} - 25 q^{91} - 34 q^{92} + 3 q^{93} + 2 q^{94} + 30 q^{95} + 7 q^{96} + 16 q^{97} - 4 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/847\mathbb{Z}\right)^\times\).

\(n\) \(122\) \(365\)
\(\chi(n)\) \(-1 - \zeta_{15}^{5}\) \(-\zeta_{15}^{2} - \zeta_{15}^{7}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
9.1
0.669131 + 0.743145i
−0.104528 + 0.994522i
−0.978148 + 0.207912i
−0.104528 0.994522i
0.913545 + 0.406737i
−0.978148 0.207912i
0.669131 0.743145i
0.913545 0.406737i
0.413545 + 0.459289i 0.913545 + 0.406737i 0.169131 1.60917i 2.18720 + 0.464905i 0.190983 + 0.587785i 2.53158 + 0.768834i 1.80902 1.31433i −1.33826 1.48629i 0.690983 + 1.19682i
81.1 0.169131 1.60917i 0.669131 + 0.743145i −0.604528 0.128496i 2.04275 + 0.909491i 1.30902 0.951057i 0.0510966 2.64526i 0.690983 2.12663i 0.209057 1.98904i 1.80902 3.13331i
130.1 −0.604528 + 0.128496i −0.104528 0.994522i −1.47815 + 0.658114i −1.49622 + 1.66172i 0.190983 + 0.587785i 1.51351 + 2.17009i 1.80902 1.31433i 1.95630 0.415823i 0.690983 1.19682i
366.1 0.169131 + 1.60917i 0.669131 0.743145i −0.604528 + 0.128496i 2.04275 0.909491i 1.30902 + 0.951057i 0.0510966 + 2.64526i 0.690983 + 2.12663i 0.209057 + 1.98904i 1.80902 + 3.13331i
487.1 −1.47815 0.658114i −0.978148 0.207912i 0.413545 + 0.459289i −0.233733 + 2.22382i 1.30902 + 0.951057i −1.59618 + 2.11002i 0.690983 + 2.12663i −1.82709 0.813473i 1.80902 3.13331i
632.1 −0.604528 0.128496i −0.104528 + 0.994522i −1.47815 0.658114i −1.49622 1.66172i 0.190983 0.587785i 1.51351 2.17009i 1.80902 + 1.31433i 1.95630 + 0.415823i 0.690983 + 1.19682i
753.1 0.413545 0.459289i 0.913545 0.406737i 0.169131 + 1.60917i 2.18720 0.464905i 0.190983 0.587785i 2.53158 0.768834i 1.80902 + 1.31433i −1.33826 + 1.48629i 0.690983 1.19682i
807.1 −1.47815 + 0.658114i −0.978148 + 0.207912i 0.413545 0.459289i −0.233733 2.22382i 1.30902 0.951057i −1.59618 2.11002i 0.690983 2.12663i −1.82709 + 0.813473i 1.80902 + 3.13331i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 9.1
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
7.c even 3 1 inner
11.c even 5 1 inner
77.m even 15 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 847.2.n.a 8
7.c even 3 1 inner 847.2.n.a 8
11.b odd 2 1 847.2.n.c 8
11.c even 5 1 847.2.e.b 4
11.c even 5 1 inner 847.2.n.a 8
11.c even 5 2 847.2.n.b 8
11.d odd 10 2 77.2.m.a 8
11.d odd 10 1 847.2.e.a 4
11.d odd 10 1 847.2.n.c 8
33.f even 10 2 693.2.by.a 8
77.h odd 6 1 847.2.n.c 8
77.l even 10 2 539.2.q.a 8
77.m even 15 1 847.2.e.b 4
77.m even 15 1 inner 847.2.n.a 8
77.m even 15 2 847.2.n.b 8
77.m even 15 1 5929.2.a.l 2
77.n even 30 2 539.2.f.b 4
77.n even 30 2 539.2.q.a 8
77.n even 30 1 5929.2.a.o 2
77.o odd 30 2 77.2.m.a 8
77.o odd 30 2 539.2.f.a 4
77.o odd 30 1 847.2.e.a 4
77.o odd 30 1 847.2.n.c 8
77.o odd 30 1 5929.2.a.q 2
77.p odd 30 1 5929.2.a.j 2
231.be even 30 2 693.2.by.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
77.2.m.a 8 11.d odd 10 2
77.2.m.a 8 77.o odd 30 2
539.2.f.a 4 77.o odd 30 2
539.2.f.b 4 77.n even 30 2
539.2.q.a 8 77.l even 10 2
539.2.q.a 8 77.n even 30 2
693.2.by.a 8 33.f even 10 2
693.2.by.a 8 231.be even 30 2
847.2.e.a 4 11.d odd 10 1
847.2.e.a 4 77.o odd 30 1
847.2.e.b 4 11.c even 5 1
847.2.e.b 4 77.m even 15 1
847.2.n.a 8 1.a even 1 1 trivial
847.2.n.a 8 7.c even 3 1 inner
847.2.n.a 8 11.c even 5 1 inner
847.2.n.a 8 77.m even 15 1 inner
847.2.n.b 8 11.c even 5 2
847.2.n.b 8 77.m even 15 2
847.2.n.c 8 11.b odd 2 1
847.2.n.c 8 11.d odd 10 1
847.2.n.c 8 77.h odd 6 1
847.2.n.c 8 77.o odd 30 1
5929.2.a.j 2 77.p odd 30 1
5929.2.a.l 2 77.m even 15 1
5929.2.a.o 2 77.n even 30 1
5929.2.a.q 2 77.o odd 30 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2}^{8} + 3T_{2}^{7} + 5T_{2}^{6} + 8T_{2}^{5} + 9T_{2}^{4} + 2T_{2}^{3} + 2T_{2} + 1 \) acting on \(S_{2}^{\mathrm{new}}(847, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} + 3 T^{7} + \cdots + 1 \) Copy content Toggle raw display
$3$ \( T^{8} - T^{7} + T^{5} + \cdots + 1 \) Copy content Toggle raw display
$5$ \( T^{8} - 5 T^{7} + \cdots + 625 \) Copy content Toggle raw display
$7$ \( T^{8} - 5 T^{7} + \cdots + 2401 \) Copy content Toggle raw display
$11$ \( T^{8} \) Copy content Toggle raw display
$13$ \( (T^{4} + 10 T^{3} + \cdots + 25)^{2} \) Copy content Toggle raw display
$17$ \( T^{8} + 6 T^{7} + \cdots + 256 \) Copy content Toggle raw display
$19$ \( T^{8} + 12 T^{7} + \cdots + 6561 \) Copy content Toggle raw display
$23$ \( (T^{4} - 8 T^{3} + \cdots + 121)^{2} \) Copy content Toggle raw display
$29$ \( (T^{4} - 3 T^{3} + 54 T^{2} + \cdots + 81)^{2} \) Copy content Toggle raw display
$31$ \( T^{8} - 3 T^{7} + \cdots + 707281 \) Copy content Toggle raw display
$37$ \( T^{8} - 12 T^{7} + \cdots + 923521 \) Copy content Toggle raw display
$41$ \( (T^{4} + 6 T^{3} + \cdots + 121)^{2} \) Copy content Toggle raw display
$43$ \( (T^{2} + 7 T + 1)^{4} \) Copy content Toggle raw display
$47$ \( T^{8} + 14 T^{7} + \cdots + 256 \) Copy content Toggle raw display
$53$ \( T^{8} - 13 T^{7} + \cdots + 923521 \) Copy content Toggle raw display
$59$ \( T^{8} - 12 T^{7} + \cdots + 1679616 \) Copy content Toggle raw display
$61$ \( T^{8} - 22 T^{7} + \cdots + 33362176 \) Copy content Toggle raw display
$67$ \( (T^{4} + 19 T^{3} + \cdots + 7921)^{2} \) Copy content Toggle raw display
$71$ \( (T^{4} - 2 T^{3} + 24 T^{2} + \cdots + 16)^{2} \) Copy content Toggle raw display
$73$ \( T^{8} - 90 T^{6} + \cdots + 4100625 \) Copy content Toggle raw display
$79$ \( T^{8} - 21 T^{7} + \cdots + 6561 \) Copy content Toggle raw display
$83$ \( (T^{4} + 9 T^{3} + \cdots + 6561)^{2} \) Copy content Toggle raw display
$89$ \( (T^{4} + 12 T^{3} + \cdots + 256)^{2} \) Copy content Toggle raw display
$97$ \( (T^{4} - 8 T^{3} + \cdots + 121)^{2} \) Copy content Toggle raw display
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