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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [3775,1,Mod(301,3775)] 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("3775.301"); S:= CuspForms(chi, 1); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(3775, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 1])) B = ModularForms(chi, 1).cuspidal_submodule().basis() N = [B[i] for i in range(len(B))]
 
Level: \( N \) \(=\) \( 3775 = 5^{2} \cdot 151 \)
Weight: \( k \) \(=\) \( 1 \)
Character orbit: \([\chi]\) \(=\) 3775.d (of order \(2\), degree \(1\), minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [4,2,0,2,0,0,0,4,0] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(9)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(1.88397042269\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\Q(i, \sqrt{5})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} + 3x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Projective image: \(A_{5}\)
Projective field: Galois closure of 5.1.570025.1
Artin image: $\SL(2,5):C_2$
Artin field: Galois closure of \(\mathbb{Q}[x]/(x^{24} - \cdots)\)

$q$-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 a basis \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_{2} q^{2} + \beta_{3} q^{3} - \beta_{2} q^{4} - \beta_1 q^{6} - \beta_1 q^{7} + q^{8} - \beta_1 q^{12} + (\beta_{3} + \beta_1) q^{13} + (\beta_{3} - \beta_1) q^{14} - q^{17} + q^{19} + \beta_{2} q^{21}+ \cdots + (\beta_{2} - 1) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 2 q^{2} + 2 q^{4} + 4 q^{8} - 4 q^{17} + 4 q^{19} - 2 q^{21} + 2 q^{31} - 4 q^{32} - 2 q^{34} + 2 q^{37} + 2 q^{38} - 2 q^{39} - 6 q^{42} - 4 q^{43} + 2 q^{47} - 2 q^{49} + 4 q^{59} + 6 q^{62} - 2 q^{64}+ \cdots - 6 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} + 3x^{2} + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} + 1 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{3} + 2\nu \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} - 1 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{3} - 2\beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/3775\mathbb{Z}\right)^\times\).

\(n\) \(152\) \(3026\)
\(\chi(n)\) \(1\) \(-1\)

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.

Copy content comment:embeddings in the coefficient field
 
Copy content gp:mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
301.1
0.618034i
0.618034i
1.61803i
1.61803i
−0.618034 1.00000i −0.618034 0 0.618034i 0.618034i 1.00000 0 0
301.2 −0.618034 1.00000i −0.618034 0 0.618034i 0.618034i 1.00000 0 0
301.3 1.61803 1.00000i 1.61803 0 1.61803i 1.61803i 1.00000 0 0
301.4 1.61803 1.00000i 1.61803 0 1.61803i 1.61803i 1.00000 0 0
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
151.b odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 3775.1.d.f yes 4
5.b even 2 1 3775.1.d.e 4
5.c odd 4 1 3775.1.c.a 4
5.c odd 4 1 3775.1.c.b 4
151.b odd 2 1 inner 3775.1.d.f yes 4
755.c odd 2 1 3775.1.d.e 4
755.f even 4 1 3775.1.c.a 4
755.f even 4 1 3775.1.c.b 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
3775.1.c.a 4 5.c odd 4 1
3775.1.c.a 4 755.f even 4 1
3775.1.c.b 4 5.c odd 4 1
3775.1.c.b 4 755.f even 4 1
3775.1.d.e 4 5.b even 2 1
3775.1.d.e 4 755.c odd 2 1
3775.1.d.f yes 4 1.a even 1 1 trivial
3775.1.d.f yes 4 151.b odd 2 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{1}^{\mathrm{new}}(3775, [\chi])\):

\( T_{2}^{2} - T_{2} - 1 \) Copy content Toggle raw display
\( T_{3}^{2} + 1 \) Copy content Toggle raw display

Hecke characteristic polynomials

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