Properties

Label 7938.2.a.bm
Level $7938$
Weight $2$
Character orbit 7938.a
Self dual yes
Analytic conductor $63.385$
Analytic rank $1$
Dimension $2$
CM no
Inner twists $1$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [7938,2,Mod(1,7938)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(7938, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("7938.1");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 7938 = 2 \cdot 3^{4} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 7938.a (trivial)

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: yes
Analytic conductor: \(63.3852491245\)
Analytic rank: \(1\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{6}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - 6 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 126)
Fricke sign: \(1\)
Sato-Tate group: $\mathrm{SU}(2)$

$q$-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 \(\beta = \sqrt{6}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - q^{2} + q^{4} + (\beta + 1) q^{5} - q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q - q^{2} + q^{4} + (\beta + 1) q^{5} - q^{8} + ( - \beta - 1) q^{10} - 2 q^{11} + 2 \beta q^{13} + q^{16} + 2 q^{17} + ( - \beta - 5) q^{19} + (\beta + 1) q^{20} + 2 q^{22} + q^{23} + (2 \beta + 2) q^{25} - 2 \beta q^{26} + ( - 2 \beta + 2) q^{29} - 6 q^{31} - q^{32} - 2 q^{34} + ( - 4 \beta + 2) q^{37} + (\beta + 5) q^{38} + ( - \beta - 1) q^{40} - 4 \beta q^{41} + ( - 2 \beta + 2) q^{43} - 2 q^{44} - q^{46} - 4 \beta q^{47} + ( - 2 \beta - 2) q^{50} + 2 \beta q^{52} + ( - 2 \beta + 6) q^{53} + ( - 2 \beta - 2) q^{55} + (2 \beta - 2) q^{58} - 2 q^{59} + ( - \beta - 9) q^{61} + 6 q^{62} + q^{64} + (2 \beta + 12) q^{65} + (2 \beta - 8) q^{67} + 2 q^{68} + ( - 2 \beta - 5) q^{71} + ( - 2 \beta + 2) q^{73} + (4 \beta - 2) q^{74} + ( - \beta - 5) q^{76} + (2 \beta + 3) q^{79} + (\beta + 1) q^{80} + 4 \beta q^{82} + 2 q^{83} + (2 \beta + 2) q^{85} + (2 \beta - 2) q^{86} + 2 q^{88} + (2 \beta - 12) q^{89} + q^{92} + 4 \beta q^{94} + ( - 6 \beta - 11) q^{95} + (2 \beta + 2) q^{97} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 2 q^{2} + 2 q^{4} + 2 q^{5} - 2 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( 2 q - 2 q^{2} + 2 q^{4} + 2 q^{5} - 2 q^{8} - 2 q^{10} - 4 q^{11} + 2 q^{16} + 4 q^{17} - 10 q^{19} + 2 q^{20} + 4 q^{22} + 2 q^{23} + 4 q^{25} + 4 q^{29} - 12 q^{31} - 2 q^{32} - 4 q^{34} + 4 q^{37} + 10 q^{38} - 2 q^{40} + 4 q^{43} - 4 q^{44} - 2 q^{46} - 4 q^{50} + 12 q^{53} - 4 q^{55} - 4 q^{58} - 4 q^{59} - 18 q^{61} + 12 q^{62} + 2 q^{64} + 24 q^{65} - 16 q^{67} + 4 q^{68} - 10 q^{71} + 4 q^{73} - 4 q^{74} - 10 q^{76} + 6 q^{79} + 2 q^{80} + 4 q^{83} + 4 q^{85} - 4 q^{86} + 4 q^{88} - 24 q^{89} + 2 q^{92} - 22 q^{95} + 4 q^{97}+O(q^{100}) \) Copy content Toggle raw display

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1.1
−2.44949
2.44949
−1.00000 0 1.00000 −1.44949 0 0 −1.00000 0 1.44949
1.2 −1.00000 0 1.00000 3.44949 0 0 −1.00000 0 −3.44949
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \(1\)
\(3\) \(-1\)
\(7\) \(-1\)

Inner twists

This newform does not admit any (nontrivial) inner twists.

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 7938.2.a.bm 2
3.b odd 2 1 7938.2.a.bn 2
7.b odd 2 1 1134.2.a.i 2
9.c even 3 2 2646.2.f.k 4
9.d odd 6 2 882.2.f.j 4
21.c even 2 1 1134.2.a.p 2
28.d even 2 1 9072.2.a.bd 2
63.g even 3 2 2646.2.h.n 4
63.h even 3 2 2646.2.e.k 4
63.i even 6 2 882.2.e.m 4
63.j odd 6 2 882.2.e.n 4
63.k odd 6 2 2646.2.h.m 4
63.l odd 6 2 378.2.f.d 4
63.n odd 6 2 882.2.h.l 4
63.o even 6 2 126.2.f.c 4
63.s even 6 2 882.2.h.k 4
63.t odd 6 2 2646.2.e.l 4
84.h odd 2 1 9072.2.a.bk 2
252.s odd 6 2 1008.2.r.e 4
252.bi even 6 2 3024.2.r.e 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
126.2.f.c 4 63.o even 6 2
378.2.f.d 4 63.l odd 6 2
882.2.e.m 4 63.i even 6 2
882.2.e.n 4 63.j odd 6 2
882.2.f.j 4 9.d odd 6 2
882.2.h.k 4 63.s even 6 2
882.2.h.l 4 63.n odd 6 2
1008.2.r.e 4 252.s odd 6 2
1134.2.a.i 2 7.b odd 2 1
1134.2.a.p 2 21.c even 2 1
2646.2.e.k 4 63.h even 3 2
2646.2.e.l 4 63.t odd 6 2
2646.2.f.k 4 9.c even 3 2
2646.2.h.m 4 63.k odd 6 2
2646.2.h.n 4 63.g even 3 2
3024.2.r.e 4 252.bi even 6 2
7938.2.a.bm 2 1.a even 1 1 trivial
7938.2.a.bn 2 3.b odd 2 1
9072.2.a.bd 2 28.d even 2 1
9072.2.a.bk 2 84.h odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(7938))\):

\( T_{5}^{2} - 2T_{5} - 5 \) Copy content Toggle raw display
\( T_{11} + 2 \) Copy content Toggle raw display
\( T_{13}^{2} - 24 \) Copy content Toggle raw display
\( T_{17} - 2 \) Copy content Toggle raw display
\( T_{23} - 1 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T + 1)^{2} \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( T^{2} - 2T - 5 \) Copy content Toggle raw display
$7$ \( T^{2} \) Copy content Toggle raw display
$11$ \( (T + 2)^{2} \) Copy content Toggle raw display
$13$ \( T^{2} - 24 \) Copy content Toggle raw display
$17$ \( (T - 2)^{2} \) Copy content Toggle raw display
$19$ \( T^{2} + 10T + 19 \) Copy content Toggle raw display
$23$ \( (T - 1)^{2} \) Copy content Toggle raw display
$29$ \( T^{2} - 4T - 20 \) Copy content Toggle raw display
$31$ \( (T + 6)^{2} \) Copy content Toggle raw display
$37$ \( T^{2} - 4T - 92 \) Copy content Toggle raw display
$41$ \( T^{2} - 96 \) Copy content Toggle raw display
$43$ \( T^{2} - 4T - 20 \) Copy content Toggle raw display
$47$ \( T^{2} - 96 \) Copy content Toggle raw display
$53$ \( T^{2} - 12T + 12 \) Copy content Toggle raw display
$59$ \( (T + 2)^{2} \) Copy content Toggle raw display
$61$ \( T^{2} + 18T + 75 \) Copy content Toggle raw display
$67$ \( T^{2} + 16T + 40 \) Copy content Toggle raw display
$71$ \( T^{2} + 10T + 1 \) Copy content Toggle raw display
$73$ \( T^{2} - 4T - 20 \) Copy content Toggle raw display
$79$ \( T^{2} - 6T - 15 \) Copy content Toggle raw display
$83$ \( (T - 2)^{2} \) Copy content Toggle raw display
$89$ \( T^{2} + 24T + 120 \) Copy content Toggle raw display
$97$ \( T^{2} - 4T - 20 \) Copy content Toggle raw display
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