Properties

Label 28.8.a.a.1.1
Level $28$
Weight $8$
Character 28.1
Self dual yes
Analytic conductor $8.747$
Analytic rank $0$
Dimension $2$
CM no
Inner twists $1$

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Show commands: Magma / Pari/GP / SageMath

Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [28,8,Mod(1,28)] 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("28.1"); S:= CuspForms(chi, 8); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(28, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0])) N = Newforms(chi, 8, names="a")
 
Level: \( N \) \(=\) \( 28 = 2^{2} \cdot 7 \)
Weight: \( k \) \(=\) \( 8 \)
Character orbit: \([\chi]\) \(=\) 28.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [2,0,-14] 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: yes
Analytic conductor: \(8.74678071356\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{3529}) \)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - x - 882 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 2 \)
Twist minimal: yes
Fricke sign: \(+1\)
Sato-Tate group: $\mathrm{SU}(2)$

Embedding invariants

Embedding label 1.1
Root \(30.2027\) of defining polynomial
Character \(\chi\) \(=\) 28.1

$q$-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)
 
\(f(q)\) \(=\) \(q-66.4054 q^{3} -157.216 q^{5} +343.000 q^{7} +2222.68 q^{9} +6209.03 q^{11} +5380.35 q^{13} +10440.0 q^{15} -10994.9 q^{17} +11703.1 q^{19} -22777.0 q^{21} +106141. q^{23} -53408.1 q^{25} -2369.04 q^{27} -51562.7 q^{29} -247557. q^{31} -412313. q^{33} -53925.1 q^{35} +433678. q^{37} -357284. q^{39} +322819. q^{41} +878703. q^{43} -349440. q^{45} +655126. q^{47} +117649. q^{49} +730121. q^{51} -444837. q^{53} -976159. q^{55} -777146. q^{57} +2.14545e6 q^{59} +592902. q^{61} +762378. q^{63} -845878. q^{65} +1.72866e6 q^{67} -7.04833e6 q^{69} +1.58060e6 q^{71} -4.33164e6 q^{73} +3.54658e6 q^{75} +2.12970e6 q^{77} -6.08518e6 q^{79} -4.70367e6 q^{81} -8.10357e6 q^{83} +1.72858e6 q^{85} +3.42404e6 q^{87} +9.86032e6 q^{89} +1.84546e6 q^{91} +1.64391e7 q^{93} -1.83991e6 q^{95} -171786. q^{97} +1.38007e7 q^{99} +O(q^{100})\)
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 14 q^{3} + 42 q^{5} + 686 q^{7} + 2782 q^{9} + 7428 q^{11} + 11830 q^{13} + 20880 q^{15} + 15792 q^{17} + 26614 q^{19} - 4802 q^{21} + 32640 q^{23} - 91846 q^{25} - 87668 q^{27} - 158016 q^{29} - 180740 q^{31}+ \cdots + 14482452 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Coefficient data

For each \(n\) we display the coefficients of the \(q\)-expansion \(a_n\), the Satake parameters \(\alpha_p\), and the Satake angles \(\theta_p = \textrm{Arg}(\alpha_p)\). You can download additional coefficients here.



Currently showing only \(a_p\); display all \(a_n\) Currently showing all \(a_n\); display only \(a_p\)
Significant digits:
\(n\) \(a_n\) \(a_n / n^{(k-1)/2}\) \( \alpha_n \) \( \theta_n \)
\(p\) \(a_p\) \(a_p / p^{(k-1)/2}\) \( \alpha_p\) \( \theta_p \)
\(2\) 0 0
\(3\) −66.4054 −1.41997 −0.709985 − 0.704217i \(-0.751298\pi\)
−0.709985 + 0.704217i \(0.751298\pi\)
\(4\) 0 0
\(5\) −157.216 −0.562474 −0.281237 − 0.959638i \(-0.590745\pi\)
−0.281237 + 0.959638i \(0.590745\pi\)
\(6\) 0 0
\(7\) 343.000 0.377964
\(8\) 0 0
\(9\) 2222.68 1.01631
\(10\) 0 0
\(11\) 6209.03 1.40653 0.703265 − 0.710928i \(-0.251725\pi\)
0.703265 + 0.710928i \(0.251725\pi\)
\(12\) 0 0
\(13\) 5380.35 0.679218 0.339609 − 0.940567i \(-0.389705\pi\)
0.339609 + 0.940567i \(0.389705\pi\)
\(14\) 0 0
\(15\) 10440.0 0.798695
\(16\) 0 0
\(17\) −10994.9 −0.542776 −0.271388 − 0.962470i \(-0.587483\pi\)
−0.271388 + 0.962470i \(0.587483\pi\)
\(18\) 0 0
\(19\) 11703.1 0.391437 0.195718 − 0.980660i \(-0.437296\pi\)
0.195718 + 0.980660i \(0.437296\pi\)
\(20\) 0 0
\(21\) −22777.0 −0.536698
\(22\) 0 0
\(23\) 106141. 1.81901 0.909506 − 0.415691i \(-0.136460\pi\)
0.909506 + 0.415691i \(0.136460\pi\)
\(24\) 0 0
\(25\) −53408.1 −0.683623
\(26\) 0 0
\(27\) −2369.04 −0.0231632
\(28\) 0 0
\(29\) −51562.7 −0.392593 −0.196297 − 0.980545i \(-0.562892\pi\)
−0.196297 + 0.980545i \(0.562892\pi\)
\(30\) 0 0
\(31\) −247557. −1.49248 −0.746240 − 0.665677i \(-0.768143\pi\)
−0.746240 + 0.665677i \(0.768143\pi\)
\(32\) 0 0
\(33\) −412313. −1.99723
\(34\) 0 0
\(35\) −53925.1 −0.212595
\(36\) 0 0
\(37\) 433678. 1.40754 0.703771 − 0.710427i \(-0.251498\pi\)
0.703771 + 0.710427i \(0.251498\pi\)
\(38\) 0 0
\(39\) −357284. −0.964468
\(40\) 0 0
\(41\) 322819. 0.731501 0.365751 − 0.930713i \(-0.380812\pi\)
0.365751 + 0.930713i \(0.380812\pi\)
\(42\) 0 0
\(43\) 878703. 1.68540 0.842699 − 0.538385i \(-0.180965\pi\)
0.842699 + 0.538385i \(0.180965\pi\)
\(44\) 0 0
\(45\) −349440. −0.571649
\(46\) 0 0
\(47\) 655126. 0.920413 0.460206 − 0.887812i \(-0.347775\pi\)
0.460206 + 0.887812i \(0.347775\pi\)
\(48\) 0 0
\(49\) 117649. 0.142857
\(50\) 0 0
\(51\) 730121. 0.770725
\(52\) 0 0
\(53\) −444837. −0.410426 −0.205213 − 0.978717i \(-0.565789\pi\)
−0.205213 + 0.978717i \(0.565789\pi\)
\(54\) 0 0
\(55\) −976159. −0.791136
\(56\) 0 0
\(57\) −777146. −0.555828
\(58\) 0 0
\(59\) 2.14545e6 1.35999 0.679996 − 0.733216i \(-0.261981\pi\)
0.679996 + 0.733216i \(0.261981\pi\)
\(60\) 0 0
\(61\) 592902. 0.334448 0.167224 − 0.985919i \(-0.446520\pi\)
0.167224 + 0.985919i \(0.446520\pi\)
\(62\) 0 0
\(63\) 762378. 0.384130
\(64\) 0 0
\(65\) −845878. −0.382042
\(66\) 0 0
\(67\) 1.72866e6 0.702180 0.351090 − 0.936342i \(-0.385811\pi\)
0.351090 + 0.936342i \(0.385811\pi\)
\(68\) 0 0
\(69\) −7.04833e6 −2.58294
\(70\) 0 0
\(71\) 1.58060e6 0.524105 0.262052 − 0.965054i \(-0.415601\pi\)
0.262052 + 0.965054i \(0.415601\pi\)
\(72\) 0 0
\(73\) −4.33164e6 −1.30323 −0.651617 − 0.758548i \(-0.725909\pi\)
−0.651617 + 0.758548i \(0.725909\pi\)
\(74\) 0 0
\(75\) 3.54658e6 0.970724
\(76\) 0 0
\(77\) 2.12970e6 0.531618
\(78\) 0 0
\(79\) −6.08518e6 −1.38860 −0.694302 − 0.719684i \(-0.744287\pi\)
−0.694302 + 0.719684i \(0.744287\pi\)
\(80\) 0 0
\(81\) −4.70367e6 −0.983421
\(82\) 0 0
\(83\) −8.10357e6 −1.55562 −0.777809 − 0.628500i \(-0.783669\pi\)
−0.777809 + 0.628500i \(0.783669\pi\)
\(84\) 0 0
\(85\) 1.72858e6 0.305297
\(86\) 0 0
\(87\) 3.42404e6 0.557470
\(88\) 0 0
\(89\) 9.86032e6 1.48261 0.741303 − 0.671170i \(-0.234208\pi\)
0.741303 + 0.671170i \(0.234208\pi\)
\(90\) 0 0
\(91\) 1.84546e6 0.256720
\(92\) 0 0
\(93\) 1.64391e7 2.11928
\(94\) 0 0
\(95\) −1.83991e6 −0.220173
\(96\) 0 0
\(97\) −171786. −0.0191111 −0.00955555 − 0.999954i \(-0.503042\pi\)
−0.00955555 + 0.999954i \(0.503042\pi\)
\(98\) 0 0
\(99\) 1.38007e7 1.42947
Currently showing only \(a_p\); display all \(a_n\) Currently showing all \(a_n\); display only \(a_p\)

Twists

       By twisting character
Char Parity Ord Type Twist Min Dim
1.1 even 1 trivial 28.8.a.a.1.1 ✓ 2
3.2 odd 2 252.8.a.e.1.2 2
4.3 odd 2 112.8.a.i.1.2 2
7.2 even 3 196.8.e.d.165.2 4
7.3 odd 6 196.8.e.a.177.1 4
7.4 even 3 196.8.e.d.177.2 4
7.5 odd 6 196.8.e.a.165.1 4
7.6 odd 2 196.8.a.b.1.2 2
8.3 odd 2 448.8.a.n.1.1 2
8.5 even 2 448.8.a.p.1.2 2
    
        By twisted newform
Twist Min Dim Char Parity Ord Type
28.8.a.a.1.1 ✓ 2 1.1 even 1 trivial
112.8.a.i.1.2 2 4.3 odd 2
196.8.a.b.1.2 2 7.6 odd 2
196.8.e.a.165.1 4 7.5 odd 6
196.8.e.a.177.1 4 7.3 odd 6
196.8.e.d.165.2 4 7.2 even 3
196.8.e.d.177.2 4 7.4 even 3
252.8.a.e.1.2 2 3.2 odd 2
448.8.a.n.1.1 2 8.3 odd 2
448.8.a.p.1.2 2 8.5 even 2