Properties

Label 100.4.l.a
Level $100$
Weight $4$
Character orbit 100.l
Analytic conductor $5.900$
Analytic rank $0$
Dimension $8$
CM discriminant -4
Inner twists $4$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [100,4,Mod(3,100)] 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("100.3"); S:= CuspForms(chi, 4); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(100, base_ring=CyclotomicField(20)) chi = DirichletCharacter(H, H._module([10, 7])) N = Newforms(chi, 4, names="a")
 
Level: \( N \) \(=\) \( 100 = 2^{2} \cdot 5^{2} \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 100.l (of order \(20\), degree \(8\), minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [8] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(1)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(5.90019100057\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: \(\Q(\zeta_{20})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{6} + x^{4} - x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{20}]$

$q$-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 primitive root of unity \(\zeta_{20}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (2 \zeta_{20}^{6} - 2 \zeta_{20}^{4} + \cdots - 2) q^{2} + 8 \zeta_{20} q^{4} + ( - 11 \zeta_{20}^{7} + \cdots + 11 \zeta_{20}) q^{5} + (16 \zeta_{20}^{7} + \cdots - 16 \zeta_{20}) q^{8} + 27 \zeta_{20}^{7} q^{9}+ \cdots + ( - 686 \zeta_{20}^{6} + 686 \zeta_{20}^{4} + \cdots + 686) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 4 q^{2} + 4 q^{5} + 32 q^{8} - 36 q^{10} + 74 q^{13} + 128 q^{16} - 198 q^{17} + 432 q^{18} + 704 q^{20} + 234 q^{25} + 296 q^{26} - 1024 q^{32} - 100 q^{34} - 432 q^{36} - 1798 q^{37} - 416 q^{40}+ \cdots + 1372 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/100\mathbb{Z}\right)^\times\).

\(n\) \(51\) \(77\)
\(\chi(n)\) \(-1\) \(\zeta_{20}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
3.1
−0.587785 + 0.809017i
−0.951057 0.309017i
0.951057 + 0.309017i
0.587785 0.809017i
0.951057 0.309017i
−0.587785 0.809017i
0.587785 + 0.809017i
−0.951057 + 0.309017i
−1.28408 2.52015i 0 −4.70228 + 6.47214i −4.84760 10.0748i 0 0 22.3488 + 3.53971i −25.6785 + 8.34346i −19.1652 + 25.1535i
23.1 −0.442463 + 2.79360i 0 −7.60845 2.47214i −11.0797 + 1.49707i 0 0 10.2726 20.1612i 15.8702 21.8435i 0.720111 31.6146i
27.1 −2.79360 0.442463i 0 7.60845 + 2.47214i 9.84359 5.30130i 0 0 −20.1612 10.2726i −15.8702 + 21.8435i −29.8447 + 10.4543i
47.1 2.52015 1.28408i 0 4.70228 6.47214i 8.08367 + 7.72362i 0 0 3.53971 22.3488i 25.6785 8.34346i 30.2898 + 9.08458i
63.1 −2.79360 + 0.442463i 0 7.60845 2.47214i 9.84359 + 5.30130i 0 0 −20.1612 + 10.2726i −15.8702 21.8435i −29.8447 10.4543i
67.1 −1.28408 + 2.52015i 0 −4.70228 6.47214i −4.84760 + 10.0748i 0 0 22.3488 3.53971i −25.6785 8.34346i −19.1652 25.1535i
83.1 2.52015 + 1.28408i 0 4.70228 + 6.47214i 8.08367 7.72362i 0 0 3.53971 + 22.3488i 25.6785 + 8.34346i 30.2898 9.08458i
87.1 −0.442463 2.79360i 0 −7.60845 + 2.47214i −11.0797 1.49707i 0 0 10.2726 + 20.1612i 15.8702 + 21.8435i 0.720111 + 31.6146i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 3.1
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 CM by \(\Q(\sqrt{-1}) \)
25.f odd 20 1 inner
100.l even 20 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 100.4.l.a 8
4.b odd 2 1 CM 100.4.l.a 8
25.f odd 20 1 inner 100.4.l.a 8
100.l even 20 1 inner 100.4.l.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
100.4.l.a 8 1.a even 1 1 trivial
100.4.l.a 8 4.b odd 2 1 CM
100.4.l.a 8 25.f odd 20 1 inner
100.4.l.a 8 100.l even 20 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3} \) acting on \(S_{4}^{\mathrm{new}}(100, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} + 4 T^{7} + \cdots + 4096 \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( T^{8} - 4 T^{7} + \cdots + 244140625 \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( T^{8} \) Copy content Toggle raw display
$13$ \( T^{8} + \cdots + 2414167030081 \) Copy content Toggle raw display
$17$ \( T^{8} + \cdots + 547705978928161 \) Copy content Toggle raw display
$19$ \( T^{8} \) Copy content Toggle raw display
$23$ \( T^{8} \) Copy content Toggle raw display
$29$ \( T^{8} + \cdots + 12\!\cdots\!41 \) Copy content Toggle raw display
$31$ \( T^{8} \) Copy content Toggle raw display
$37$ \( T^{8} + \cdots + 79\!\cdots\!81 \) Copy content Toggle raw display
$41$ \( T^{8} + \cdots + 11\!\cdots\!81 \) Copy content Toggle raw display
$43$ \( T^{8} \) Copy content Toggle raw display
$47$ \( T^{8} \) Copy content Toggle raw display
$53$ \( T^{8} + \cdots + 12\!\cdots\!41 \) Copy content Toggle raw display
$59$ \( T^{8} \) Copy content Toggle raw display
$61$ \( T^{8} + \cdots + 32\!\cdots\!21 \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( T^{8} \) Copy content Toggle raw display
$73$ \( T^{8} + \cdots + 27\!\cdots\!21 \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( T^{8} \) Copy content Toggle raw display
$89$ \( T^{8} + \cdots + 56\!\cdots\!21 \) Copy content Toggle raw display
$97$ \( T^{8} + \cdots + 17\!\cdots\!41 \) Copy content Toggle raw display
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