Properties

Label 77.2.a.d
Level $77$
Weight $2$
Character orbit 77.a
Self dual yes
Analytic conductor $0.615$
Analytic rank $0$
Dimension $2$
CM no
Inner twists $1$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [77,2,Mod(1,77)] mf = mfinit([N,k,chi],0) lf = mfeigenbasis(mf)
 
Copy content magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code chi := DirichletCharacter("77.1"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(77, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 77 = 7 \cdot 11 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 77.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [2,0,2] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(3)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: yes
Analytic conductor: \(0.614848095564\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{5}) \)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - x - 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2]\)
Coefficient ring index: \( 2 \)
Twist minimal: yes
Fricke sign: \(-1\)
Sato-Tate group: $\mathrm{SU}(2)$

$q$-expansion

Copy content comment:q-expansion
 
Copy content sage:f.q_expansion() # note that sage often uses an isomorphic number field
 
Copy content gp:mfcoefs(f, 20)
 

Coefficients of the \(q\)-expansion are expressed in terms of \(\beta = \sqrt{5}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta q^{2} + (\beta + 1) q^{3} + 3 q^{4} - 2 q^{5} + ( - \beta - 5) q^{6} + q^{7} - \beta q^{8} + (2 \beta + 3) q^{9} + 2 \beta q^{10} - q^{11} + (3 \beta + 3) q^{12} + ( - \beta + 1) q^{13} - \beta q^{14} + \cdots + ( - 2 \beta - 3) q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q + 2 q^{3} + 6 q^{4} - 4 q^{5} - 10 q^{6} + 2 q^{7} + 6 q^{9} - 2 q^{11} + 6 q^{12} + 2 q^{13} - 4 q^{15} - 2 q^{16} - 2 q^{17} - 20 q^{18} + 4 q^{19} - 12 q^{20} + 2 q^{21} - 4 q^{23} - 10 q^{24} - 2 q^{25}+ \cdots - 6 q^{99}+O(q^{100}) \) 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.

Copy content comment:embeddings in the coefficient field
 
Copy content 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
1.61803
−0.618034
−2.23607 3.23607 3.00000 −2.00000 −7.23607 1.00000 −2.23607 7.47214 4.47214
1.2 2.23607 −1.23607 3.00000 −2.00000 −2.76393 1.00000 2.23607 −1.47214 −4.47214
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(7\) \( -1 \)
\(11\) \( +1 \)

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 77.2.a.d 2
3.b odd 2 1 693.2.a.h 2
4.b odd 2 1 1232.2.a.m 2
5.b even 2 1 1925.2.a.r 2
5.c odd 4 2 1925.2.b.h 4
7.b odd 2 1 539.2.a.f 2
7.c even 3 2 539.2.e.i 4
7.d odd 6 2 539.2.e.j 4
8.b even 2 1 4928.2.a.bm 2
8.d odd 2 1 4928.2.a.bv 2
11.b odd 2 1 847.2.a.f 2
11.c even 5 2 847.2.f.a 4
11.c even 5 2 847.2.f.n 4
11.d odd 10 2 847.2.f.b 4
11.d odd 10 2 847.2.f.m 4
21.c even 2 1 4851.2.a.y 2
28.d even 2 1 8624.2.a.ce 2
33.d even 2 1 7623.2.a.bl 2
77.b even 2 1 5929.2.a.m 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
77.2.a.d 2 1.a even 1 1 trivial
539.2.a.f 2 7.b odd 2 1
539.2.e.i 4 7.c even 3 2
539.2.e.j 4 7.d odd 6 2
693.2.a.h 2 3.b odd 2 1
847.2.a.f 2 11.b odd 2 1
847.2.f.a 4 11.c even 5 2
847.2.f.b 4 11.d odd 10 2
847.2.f.m 4 11.d odd 10 2
847.2.f.n 4 11.c even 5 2
1232.2.a.m 2 4.b odd 2 1
1925.2.a.r 2 5.b even 2 1
1925.2.b.h 4 5.c odd 4 2
4851.2.a.y 2 21.c even 2 1
4928.2.a.bm 2 8.b even 2 1
4928.2.a.bv 2 8.d odd 2 1
5929.2.a.m 2 77.b even 2 1
7623.2.a.bl 2 33.d even 2 1
8624.2.a.ce 2 28.d even 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(77))\):

\( T_{2}^{2} - 5 \) Copy content Toggle raw display
\( T_{3}^{2} - 2T_{3} - 4 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} - 5 \) Copy content Toggle raw display
$3$ \( T^{2} - 2T - 4 \) Copy content Toggle raw display
$5$ \( (T + 2)^{2} \) Copy content Toggle raw display
$7$ \( (T - 1)^{2} \) Copy content Toggle raw display
$11$ \( (T + 1)^{2} \) Copy content Toggle raw display
$13$ \( T^{2} - 2T - 4 \) Copy content Toggle raw display
$17$ \( T^{2} + 2T - 4 \) Copy content Toggle raw display
$19$ \( T^{2} - 4T - 16 \) Copy content Toggle raw display
$23$ \( T^{2} + 4T - 16 \) Copy content Toggle raw display
$29$ \( T^{2} - 8T - 4 \) Copy content Toggle raw display
$31$ \( T^{2} + 10T + 20 \) Copy content Toggle raw display
$37$ \( T^{2} + 8T - 4 \) Copy content Toggle raw display
$41$ \( T^{2} + 18T + 76 \) Copy content Toggle raw display
$43$ \( (T - 8)^{2} \) Copy content Toggle raw display
$47$ \( T^{2} - 10T + 20 \) Copy content Toggle raw display
$53$ \( T^{2} - 8T - 4 \) Copy content Toggle raw display
$59$ \( T^{2} - 2T - 4 \) Copy content Toggle raw display
$61$ \( T^{2} + 10T + 20 \) Copy content Toggle raw display
$67$ \( T^{2} - 20T + 80 \) Copy content Toggle raw display
$71$ \( T^{2} + 12T + 16 \) Copy content Toggle raw display
$73$ \( T^{2} + 6T + 4 \) Copy content Toggle raw display
$79$ \( T^{2} - 80 \) Copy content Toggle raw display
$83$ \( T^{2} - 4T - 176 \) Copy content Toggle raw display
$89$ \( (T - 2)^{2} \) Copy content Toggle raw display
$97$ \( T^{2} - 8T - 164 \) Copy content Toggle raw display
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