Show commands: Magma / Pari/GP / SageMath

Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [75,10,Mod(49,75)] 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("75.49"); S:= CuspForms(chi, 10); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(75, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 1])) N = Newforms(chi, 10, names="a")
 
Level: \( N \) \(=\) \( 75 = 3 \cdot 5^{2} \)
Weight: \( k \) \(=\) \( 10 \)
Character orbit: \([\chi]\) \(=\) 75.b (of order \(2\), degree \(1\), not minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [4,0,0,-512] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(4)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(38.6276877123\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\Q(i, \sqrt{79})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - 39x^{2} + 400 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{11}]\)
Coefficient ring index: \( 2^{4} \)
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 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.

\(f(q)\) \(=\) \( q + (\beta_{3} + 18 \beta_1) q^{2} + 81 \beta_1 q^{3} + ( - 36 \beta_{2} - 128) q^{4} + ( - 81 \beta_{2} - 1458) q^{6} + ( - 126 \beta_{3} - 1659 \beta_1) q^{7} + ( - 264 \beta_{3} - 4464 \beta_1) q^{8}+ \cdots + (12977658 \beta_{2} - 79479954) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 512 q^{4} - 5832 q^{6} - 26244 q^{9} + 48456 q^{11} + 278712 q^{14} + 392960 q^{16} + 2697692 q^{19} + 537516 q^{21} + 1446336 q^{24} + 8097048 q^{26} + 8566344 q^{29} + 2353164 q^{31} + 26301776 q^{34}+ \cdots - 317919816 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} - 39x^{2} + 400 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{3} - 19\nu ) / 20 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -\nu^{3} + 59\nu ) / 10 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( 4\nu^{2} - 78 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{2} + 2\beta_1 ) / 4 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{3} + 78 ) / 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 19\beta_{2} + 118\beta_1 ) / 4 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/75\mathbb{Z}\right)^\times\).

\(n\) \(26\) \(52\)
\(\chi(n)\) \(1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
49.1
4.44410 0.500000i
−4.44410 0.500000i
−4.44410 + 0.500000i
4.44410 + 0.500000i
35.7764i 81.0000i −767.950 0 −2897.89 3898.82i 9156.97i −6561.00 0
49.2 0.223611i 81.0000i 511.950 0 −18.1125 580.825i 228.967i −6561.00 0
49.3 0.223611i 81.0000i 511.950 0 −18.1125 580.825i 228.967i −6561.00 0
49.4 35.7764i 81.0000i −767.950 0 −2897.89 3898.82i 9156.97i −6561.00 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
5.b even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 75.10.b.g 4
3.b odd 2 1 225.10.b.j 4
5.b even 2 1 inner 75.10.b.g 4
5.c odd 4 1 75.10.a.e 2
5.c odd 4 1 75.10.a.h yes 2
15.d odd 2 1 225.10.b.j 4
15.e even 4 1 225.10.a.g 2
15.e even 4 1 225.10.a.l 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
75.10.a.e 2 5.c odd 4 1
75.10.a.h yes 2 5.c odd 4 1
75.10.b.g 4 1.a even 1 1 trivial
75.10.b.g 4 5.b even 2 1 inner
225.10.a.g 2 15.e even 4 1
225.10.a.l 2 15.e even 4 1
225.10.b.j 4 3.b odd 2 1
225.10.b.j 4 15.d odd 2 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2}^{4} + 1280T_{2}^{2} + 64 \) acting on \(S_{10}^{\mathrm{new}}(75, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} + 1280T^{2} + 64 \) Copy content Toggle raw display
$3$ \( (T^{2} + 6561)^{2} \) Copy content Toggle raw display
$5$ \( T^{4} \) Copy content Toggle raw display
$7$ \( T^{4} + \cdots + 5128118766225 \) Copy content Toggle raw display
$11$ \( (T^{2} - 24228 T - 1089595948)^{2} \) Copy content Toggle raw display
$13$ \( T^{4} + \cdots + 64\!\cdots\!49 \) Copy content Toggle raw display
$17$ \( T^{4} + \cdots + 81\!\cdots\!76 \) Copy content Toggle raw display
$19$ \( (T^{2} - 1348846 T + 273466881505)^{2} \) Copy content Toggle raw display
$23$ \( T^{4} + \cdots + 17\!\cdots\!00 \) Copy content Toggle raw display
$29$ \( (T^{2} - 4283172 T - 290780819500)^{2} \) Copy content Toggle raw display
$31$ \( (T^{2} + \cdots - 38000674643175)^{2} \) Copy content Toggle raw display
$37$ \( T^{4} + \cdots + 22\!\cdots\!00 \) Copy content Toggle raw display
$41$ \( (T^{2} + \cdots - 214074226693600)^{2} \) Copy content Toggle raw display
$43$ \( T^{4} + \cdots + 98\!\cdots\!01 \) Copy content Toggle raw display
$47$ \( T^{4} + \cdots + 62\!\cdots\!76 \) Copy content Toggle raw display
$53$ \( T^{4} + \cdots + 32\!\cdots\!00 \) Copy content Toggle raw display
$59$ \( (T^{2} + \cdots - 11\!\cdots\!20)^{2} \) Copy content Toggle raw display
$61$ \( (T^{2} + \cdots + 13\!\cdots\!21)^{2} \) Copy content Toggle raw display
$67$ \( T^{4} + \cdots + 60\!\cdots\!21 \) Copy content Toggle raw display
$71$ \( (T^{2} + \cdots - 25\!\cdots\!56)^{2} \) Copy content Toggle raw display
$73$ \( T^{4} + \cdots + 31\!\cdots\!00 \) Copy content Toggle raw display
$79$ \( (T^{2} + \cdots + 61\!\cdots\!00)^{2} \) Copy content Toggle raw display
$83$ \( T^{4} + \cdots + 49\!\cdots\!24 \) Copy content Toggle raw display
$89$ \( (T^{2} + \cdots - 18\!\cdots\!80)^{2} \) Copy content Toggle raw display
$97$ \( T^{4} + \cdots + 56\!\cdots\!41 \) Copy content Toggle raw display
show more
show less