Properties

Label 198.4.f.b
Level $198$
Weight $4$
Character orbit 198.f
Analytic conductor $11.682$
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] = [198,4,Mod(37,198)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(198, base_ring=CyclotomicField(10))
 
chi = DirichletCharacter(H, H._module([0, 2]))
 
N = Newforms(chi, 4, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("198.37");
 
S:= CuspForms(chi, 4);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 198 = 2 \cdot 3^{2} \cdot 11 \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 198.f (of order \(5\), degree \(4\), 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: \(11.6823781811\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\Q(\zeta_{10})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{3} + x^{2} - x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 22)
Sato-Tate group: $\mathrm{SU}(2)[C_{5}]$

$q$-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 \(\zeta_{10}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + ( - 2 \zeta_{10}^{3} + 2 \zeta_{10}^{2} + \cdots + 2) q^{2}+ \cdots - 8 \zeta_{10}^{2} q^{8} +O(q^{10}) \) Copy content Toggle raw display \( q + ( - 2 \zeta_{10}^{3} + 2 \zeta_{10}^{2} + \cdots + 2) q^{2}+ \cdots + (110 \zeta_{10}^{3} - 110 \zeta_{10}^{2} + 316) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 2 q^{2} - 4 q^{4} - 3 q^{5} + 25 q^{7} + 8 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( 4 q + 2 q^{2} - 4 q^{4} - 3 q^{5} + 25 q^{7} + 8 q^{8} - 4 q^{10} - 44 q^{11} + 91 q^{13} - 50 q^{14} - 16 q^{16} - 23 q^{17} + 59 q^{19} - 12 q^{20} - 22 q^{22} + 224 q^{23} + 126 q^{25} + 108 q^{26} - 120 q^{28} + 425 q^{29} - 227 q^{31} - 128 q^{32} - 724 q^{34} - 35 q^{35} - 61 q^{37} - 28 q^{38} - 16 q^{40} - 347 q^{41} + 1160 q^{43} - 396 q^{44} - 8 q^{46} - 251 q^{47} + 48 q^{49} - 242 q^{50} - 216 q^{52} + 245 q^{53} + 33 q^{55} - 80 q^{56} - 850 q^{58} + 827 q^{59} + 1335 q^{61} - 976 q^{62} - 64 q^{64} - 182 q^{65} - 88 q^{67} - 92 q^{68} - 10 q^{70} + 1665 q^{71} - 153 q^{73} + 122 q^{74} - 584 q^{76} + 55 q^{77} + 677 q^{79} + 32 q^{80} - 596 q^{82} - 887 q^{83} + 181 q^{85} + 240 q^{86} - 88 q^{88} - 1728 q^{89} - 245 q^{91} - 464 q^{92} + 292 q^{94} - 73 q^{95} + 2019 q^{97} + 1484 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/198\mathbb{Z}\right)^\times\).

\(n\) \(145\) \(155\)
\(\chi(n)\) \(-\zeta_{10}^{3}\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
37.1
0.809017 0.587785i
0.809017 + 0.587785i
−0.309017 0.951057i
−0.309017 + 0.951057i
1.61803 + 1.17557i 0 1.23607 + 3.80423i −1.30902 + 0.951057i 0 4.57295 + 14.0741i −2.47214 + 7.60845i 0 −3.23607
91.1 1.61803 1.17557i 0 1.23607 3.80423i −1.30902 0.951057i 0 4.57295 14.0741i −2.47214 7.60845i 0 −3.23607
163.1 −0.618034 + 1.90211i 0 −3.23607 2.35114i −0.190983 0.587785i 0 7.92705 + 5.75934i 6.47214 4.70228i 0 1.23607
181.1 −0.618034 1.90211i 0 −3.23607 + 2.35114i −0.190983 + 0.587785i 0 7.92705 5.75934i 6.47214 + 4.70228i 0 1.23607
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
11.c even 5 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 198.4.f.b 4
3.b odd 2 1 22.4.c.a 4
11.c even 5 1 inner 198.4.f.b 4
11.c even 5 1 2178.4.a.z 2
11.d odd 10 1 2178.4.a.bi 2
12.b even 2 1 176.4.m.a 4
33.d even 2 1 242.4.c.j 4
33.f even 10 1 242.4.a.h 2
33.f even 10 1 242.4.c.j 4
33.f even 10 2 242.4.c.m 4
33.h odd 10 1 22.4.c.a 4
33.h odd 10 1 242.4.a.k 2
33.h odd 10 2 242.4.c.f 4
132.n odd 10 1 1936.4.a.bc 2
132.o even 10 1 176.4.m.a 4
132.o even 10 1 1936.4.a.bb 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
22.4.c.a 4 3.b odd 2 1
22.4.c.a 4 33.h odd 10 1
176.4.m.a 4 12.b even 2 1
176.4.m.a 4 132.o even 10 1
198.4.f.b 4 1.a even 1 1 trivial
198.4.f.b 4 11.c even 5 1 inner
242.4.a.h 2 33.f even 10 1
242.4.a.k 2 33.h odd 10 1
242.4.c.f 4 33.h odd 10 2
242.4.c.j 4 33.d even 2 1
242.4.c.j 4 33.f even 10 1
242.4.c.m 4 33.f even 10 2
1936.4.a.bb 2 132.o even 10 1
1936.4.a.bc 2 132.n odd 10 1
2178.4.a.z 2 11.c even 5 1
2178.4.a.bi 2 11.d odd 10 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{4} + 3T_{5}^{3} + 4T_{5}^{2} + 2T_{5} + 1 \) acting on \(S_{4}^{\mathrm{new}}(198, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} - 2 T^{3} + \cdots + 16 \) Copy content Toggle raw display
$3$ \( T^{4} \) Copy content Toggle raw display
$5$ \( T^{4} + 3 T^{3} + \cdots + 1 \) Copy content Toggle raw display
$7$ \( T^{4} - 25 T^{3} + \cdots + 21025 \) Copy content Toggle raw display
$11$ \( T^{4} + 44 T^{3} + \cdots + 1771561 \) Copy content Toggle raw display
$13$ \( T^{4} - 91 T^{3} + \cdots + 502681 \) Copy content Toggle raw display
$17$ \( T^{4} + 23 T^{3} + \cdots + 52983841 \) Copy content Toggle raw display
$19$ \( T^{4} - 59 T^{3} + \cdots + 1515361 \) Copy content Toggle raw display
$23$ \( (T^{2} - 112 T + 2416)^{2} \) Copy content Toggle raw display
$29$ \( T^{4} - 425 T^{3} + \cdots + 951414025 \) Copy content Toggle raw display
$31$ \( T^{4} + 227 T^{3} + \cdots + 72777961 \) Copy content Toggle raw display
$37$ \( T^{4} + 61 T^{3} + \cdots + 117310561 \) Copy content Toggle raw display
$41$ \( T^{4} + 347 T^{3} + \cdots + 408080401 \) Copy content Toggle raw display
$43$ \( (T^{2} - 580 T + 78320)^{2} \) Copy content Toggle raw display
$47$ \( T^{4} + \cdots + 1509400201 \) Copy content Toggle raw display
$53$ \( T^{4} + \cdots + 1259895025 \) Copy content Toggle raw display
$59$ \( T^{4} + \cdots + 11599505401 \) Copy content Toggle raw display
$61$ \( T^{4} + \cdots + 46442405025 \) Copy content Toggle raw display
$67$ \( (T^{2} + 44 T - 16336)^{2} \) Copy content Toggle raw display
$71$ \( T^{4} + \cdots + 5373623025 \) Copy content Toggle raw display
$73$ \( T^{4} + 153 T^{3} + \cdots + 6765201 \) Copy content Toggle raw display
$79$ \( T^{4} + \cdots + 6794540041 \) Copy content Toggle raw display
$83$ \( T^{4} + \cdots + 36760776361 \) Copy content Toggle raw display
$89$ \( (T^{2} + 864 T - 917876)^{2} \) Copy content Toggle raw display
$97$ \( T^{4} + \cdots + 181211124721 \) Copy content Toggle raw display
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