Properties

Label 75.18.b.b
Level $75$
Weight $18$
Character orbit 75.b
Analytic conductor $137.417$
Analytic rank $0$
Dimension $4$
Inner twists $2$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [75,18,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, 18); 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, 18, names="a")
 
Level: \( N \) \(=\) \( 75 = 3 \cdot 5^{2} \)
Weight: \( k \) \(=\) \( 18 \)
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,-702752] 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: \(137.416565508\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\Q(i, \sqrt{849})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} + 425x^{2} + 44944 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 2^{4}\cdot 3^{4} \)
Twist minimal: no (minimal twist has level 15)
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.

\(f(q)\) \(=\) \( q + (\beta_{2} - 178 \beta_1) q^{2} - 6561 \beta_1 q^{3} + (356 \beta_{3} - 175688) q^{4} + (6561 \beta_{3} - 1167858) q^{6} + ( - 14686 \beta_{2} - 10377276 \beta_1) q^{7} + ( - 107984 \beta_{2} + 105868704 \beta_1) q^{8}+ \cdots + ( - 34514344337148 \beta_{3} + 24\!\cdots\!76) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 702752 q^{4} - 4671432 q^{6} - 172186884 q^{9} - 2263259824 q^{11} + 8770444032 q^{14} + 102082634240 q^{16} + 388752254432 q^{19} - 272341231344 q^{21} + 2778418267776 q^{24} - 6214885009072 q^{26}+ \cdots + 97\!\cdots\!04 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{4} + 425x^{2} + 44944 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{3} + 213\nu ) / 212 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( 9\nu^{3} + 5733\nu ) / 106 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( 36\nu^{2} + 7650 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{2} - 18\beta_1 ) / 36 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{3} - 7650 ) / 36 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -71\beta_{2} + 3822\beta_1 ) / 12 \) 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
15.0688i
14.0688i
14.0688i
15.0688i
702.477i 6561.00i −362402. 0 −4.60895e6 2.67481e6i 1.62504e8i −4.30467e7 0
49.2 346.477i 6561.00i 11025.8 0 2.27323e6 1.80797e7i 4.92336e7i −4.30467e7 0
49.3 346.477i 6561.00i 11025.8 0 2.27323e6 1.80797e7i 4.92336e7i −4.30467e7 0
49.4 702.477i 6561.00i −362402. 0 −4.60895e6 2.67481e6i 1.62504e8i −4.30467e7 0
\(n\): e.g. 2-40 or 990-1000
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 75.18.b.b 4
5.b even 2 1 inner 75.18.b.b 4
5.c odd 4 1 15.18.a.a 2
5.c odd 4 1 75.18.a.c 2
15.e even 4 1 45.18.a.b 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
15.18.a.a 2 5.c odd 4 1
45.18.a.b 2 15.e even 4 1
75.18.a.c 2 5.c odd 4 1
75.18.b.b 4 1.a even 1 1 trivial
75.18.b.b 4 5.b even 2 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2}^{4} + 613520T_{2}^{2} + 59239665664 \) acting on \(S_{18}^{\mathrm{new}}(75, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} + \cdots + 59239665664 \) Copy content Toggle raw display
$3$ \( (T^{2} + 43046721)^{2} \) Copy content Toggle raw display
$5$ \( T^{4} \) Copy content Toggle raw display
$7$ \( T^{4} + \cdots + 23\!\cdots\!00 \) Copy content Toggle raw display
$11$ \( (T^{2} + \cdots + 14\!\cdots\!92)^{2} \) Copy content Toggle raw display
$13$ \( T^{4} + \cdots + 84\!\cdots\!84 \) Copy content Toggle raw display
$17$ \( T^{4} + \cdots + 10\!\cdots\!76 \) Copy content Toggle raw display
$19$ \( (T^{2} + \cdots + 88\!\cdots\!80)^{2} \) Copy content Toggle raw display
$23$ \( T^{4} + \cdots + 36\!\cdots\!00 \) Copy content Toggle raw display
$29$ \( (T^{2} + \cdots - 79\!\cdots\!00)^{2} \) Copy content Toggle raw display
$31$ \( (T^{2} + \cdots - 41\!\cdots\!00)^{2} \) Copy content Toggle raw display
$37$ \( T^{4} + \cdots + 13\!\cdots\!00 \) Copy content Toggle raw display
$41$ \( (T^{2} + \cdots + 41\!\cdots\!80)^{2} \) Copy content Toggle raw display
$43$ \( T^{4} + \cdots + 19\!\cdots\!16 \) Copy content Toggle raw display
$47$ \( T^{4} + \cdots + 68\!\cdots\!96 \) Copy content Toggle raw display
$53$ \( T^{4} + \cdots + 26\!\cdots\!00 \) Copy content Toggle raw display
$59$ \( (T^{2} + \cdots - 10\!\cdots\!20)^{2} \) Copy content Toggle raw display
$61$ \( (T^{2} + \cdots + 20\!\cdots\!76)^{2} \) Copy content Toggle raw display
$67$ \( T^{4} + \cdots + 38\!\cdots\!76 \) Copy content Toggle raw display
$71$ \( (T^{2} + \cdots - 65\!\cdots\!96)^{2} \) Copy content Toggle raw display
$73$ \( T^{4} + \cdots + 65\!\cdots\!00 \) Copy content Toggle raw display
$79$ \( (T^{2} + \cdots - 86\!\cdots\!00)^{2} \) Copy content Toggle raw display
$83$ \( T^{4} + \cdots + 85\!\cdots\!04 \) Copy content Toggle raw display
$89$ \( (T^{2} + \cdots + 57\!\cdots\!20)^{2} \) Copy content Toggle raw display
$97$ \( T^{4} + \cdots + 11\!\cdots\!56 \) Copy content Toggle raw display
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