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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [435,2,Mod(289,435)] 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("435.289"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(435, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 1, 1])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 435 = 3 \cdot 5 \cdot 29 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 435.f (of order \(2\), degree \(1\), minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [2,-4,2] 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: no
Analytic conductor: \(3.47349248793\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{-1}) \)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-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 \(i = \sqrt{-1}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - 2 q^{2} + q^{3} + 2 q^{4} + (i + 2) q^{5} - 2 q^{6} + 4 i q^{7} + q^{9} + ( - 2 i - 4) q^{10} + i q^{11} + 2 q^{12} + 2 i q^{13} - 8 i q^{14} + (i + 2) q^{15} - 4 q^{16} - 6 q^{17} - 2 q^{18} + 4 i q^{19} + \cdots + i q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 4 q^{2} + 2 q^{3} + 4 q^{4} + 4 q^{5} - 4 q^{6} + 2 q^{9} - 8 q^{10} + 4 q^{12} + 4 q^{15} - 8 q^{16} - 12 q^{17} - 4 q^{18} + 8 q^{20} + 6 q^{25} + 2 q^{27} - 4 q^{29} - 8 q^{30} + 16 q^{32} + 24 q^{34}+ \cdots + 36 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/435\mathbb{Z}\right)^\times\).

\(n\) \(31\) \(146\) \(262\)
\(\chi(n)\) \(-1\) \(1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
289.1
1.00000i
1.00000i
−2.00000 1.00000 2.00000 2.00000 1.00000i −2.00000 4.00000i 0 1.00000 −4.00000 + 2.00000i
289.2 −2.00000 1.00000 2.00000 2.00000 + 1.00000i −2.00000 4.00000i 0 1.00000 −4.00000 2.00000i
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
145.d even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 435.2.f.a 2
3.b odd 2 1 1305.2.f.d 2
5.b even 2 1 435.2.f.d yes 2
5.c odd 4 1 2175.2.d.a 2
5.c odd 4 1 2175.2.d.b 2
15.d odd 2 1 1305.2.f.a 2
29.b even 2 1 435.2.f.d yes 2
87.d odd 2 1 1305.2.f.a 2
145.d even 2 1 inner 435.2.f.a 2
145.h odd 4 1 2175.2.d.a 2
145.h odd 4 1 2175.2.d.b 2
435.b odd 2 1 1305.2.f.d 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
435.2.f.a 2 1.a even 1 1 trivial
435.2.f.a 2 145.d even 2 1 inner
435.2.f.d yes 2 5.b even 2 1
435.2.f.d yes 2 29.b even 2 1
1305.2.f.a 2 15.d odd 2 1
1305.2.f.a 2 87.d odd 2 1
1305.2.f.d 2 3.b odd 2 1
1305.2.f.d 2 435.b odd 2 1
2175.2.d.a 2 5.c odd 4 1
2175.2.d.a 2 145.h odd 4 1
2175.2.d.b 2 5.c odd 4 1
2175.2.d.b 2 145.h odd 4 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2} + 2 \) acting on \(S_{2}^{\mathrm{new}}(435, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T + 2)^{2} \) Copy content Toggle raw display
$3$ \( (T - 1)^{2} \) Copy content Toggle raw display
$5$ \( T^{2} - 4T + 5 \) Copy content Toggle raw display
$7$ \( T^{2} + 16 \) Copy content Toggle raw display
$11$ \( T^{2} + 1 \) Copy content Toggle raw display
$13$ \( T^{2} + 4 \) Copy content Toggle raw display
$17$ \( (T + 6)^{2} \) Copy content Toggle raw display
$19$ \( T^{2} + 16 \) Copy content Toggle raw display
$23$ \( T^{2} + 81 \) Copy content Toggle raw display
$29$ \( T^{2} + 4T + 29 \) Copy content Toggle raw display
$31$ \( T^{2} + 4 \) Copy content Toggle raw display
$37$ \( (T + 1)^{2} \) Copy content Toggle raw display
$41$ \( T^{2} + 81 \) Copy content Toggle raw display
$43$ \( (T + 1)^{2} \) Copy content Toggle raw display
$47$ \( (T - 8)^{2} \) Copy content Toggle raw display
$53$ \( T^{2} + 81 \) Copy content Toggle raw display
$59$ \( (T - 8)^{2} \) Copy content Toggle raw display
$61$ \( T^{2} + 36 \) Copy content Toggle raw display
$67$ \( T^{2} + 144 \) Copy content Toggle raw display
$71$ \( (T - 2)^{2} \) Copy content Toggle raw display
$73$ \( (T - 15)^{2} \) Copy content Toggle raw display
$79$ \( T^{2} + 16 \) Copy content Toggle raw display
$83$ \( T^{2} + 49 \) Copy content Toggle raw display
$89$ \( T^{2} + 4 \) Copy content Toggle raw display
$97$ \( (T - 11)^{2} \) Copy content Toggle raw display
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