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Properties

Label 81.8.c.d.55.1
Level $81$
Weight $8$
Character 81.55
Analytic conductor $25.303$
Analytic rank $0$
Dimension $4$
Inner twists $2$

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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] = [81,8,Mod(28,81)] 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("81.28"); S:= CuspForms(chi, 8); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(81, base_ring=CyclotomicField(6)) chi = DirichletCharacter(H, H._module([2])) N = Newforms(chi, 8, names="a")
 
Level: \( N \) \(=\) \( 81 = 3^{4} \)
Weight: \( k \) \(=\) \( 8 \)
Character orbit: \([\chi]\) \(=\) 81.c (of order \(3\), degree \(2\), not minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [4,-9,0,-77] 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: \(25.3031870642\)
Analytic rank: \(0\)
Dimension: \(4\)
Relative dimension: \(2\) over \(\Q(\zeta_{3})\)
Coefficient field: \(\Q(\sqrt{-3}, \sqrt{65})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{3} + 17x^{2} + 16x + 256 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 3^{2} \)
Twist minimal: no (minimal twist has level 27)
Sato-Tate group: $\mathrm{SU}(2)[C_{3}]$

Embedding invariants

Embedding label 55.1
Root \(2.26556 - 3.92407i\) of defining polynomial
Character \(\chi\) \(=\) 81.55
Dual form 81.8.c.d.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)
 
\(f(q)\) \(=\) \(q+(-8.29669 + 14.3703i) q^{2} +(-73.6702 - 127.601i) q^{4} +(-57.0934 - 98.8886i) q^{5} +(-719.202 + 1245.70i) q^{7} +320.924 q^{8} +1894.75 q^{10} +(-2964.37 + 5134.44i) q^{11} +(5723.62 + 9913.60i) q^{13} +(-11934.0 - 20670.3i) q^{14} +(6767.18 - 11721.1i) q^{16} -20235.6 q^{17} -6354.94 q^{19} +(-8412.17 + 14570.3i) q^{20} +(-49188.9 - 85197.7i) q^{22} +(-37922.8 - 65684.2i) q^{23} +(32543.2 - 56366.5i) q^{25} -189948. q^{26} +211935. q^{28} +(37392.1 - 64765.1i) q^{29} +(94681.4 + 163993. i) q^{31} +(132830. + 230068. i) q^{32} +(167889. - 290792. i) q^{34} +164247. q^{35} -33407.2 q^{37} +(52725.0 - 91322.4i) q^{38} +(-18322.6 - 31735.7i) q^{40} +(-70622.4 - 122322. i) q^{41} +(123099. - 213213. i) q^{43} +873543. q^{44} +1.25854e6 q^{46} +(-167566. + 290234. i) q^{47} +(-622733. - 1.07860e6i) q^{49} +(540002. + 935310. i) q^{50} +(843321. - 1.46067e6i) q^{52} +1.65156e6 q^{53} +676983. q^{55} +(-230809. + 399774. i) q^{56} +(620462. + 1.07467e6i) q^{58} +(-1.02411e6 - 1.77382e6i) q^{59} +(295235. - 511361. i) q^{61} -3.14217e6 q^{62} -2.67579e6 q^{64} +(653562. - 1.13200e6i) q^{65} +(-26787.7 - 46397.7i) q^{67} +(1.49076e6 + 2.58208e6i) q^{68} +(-1.36271e6 + 2.36027e6i) q^{70} -4.95678e6 q^{71} +817542. q^{73} +(277169. - 480071. i) q^{74} +(468170. + 810895. i) q^{76} +(-4.26396e6 - 7.38540e6i) q^{77} +(-3.78629e6 + 6.55804e6i) q^{79} -1.54545e6 q^{80} +2.34373e6 q^{82} +(509455. - 882402. i) q^{83} +(1.15532e6 + 2.00108e6i) q^{85} +(2.04262e6 + 3.53792e6i) q^{86} +(-951337. + 1.64776e6i) q^{88} +1.37281e6 q^{89} -1.64658e7 q^{91} +(-5.58756e6 + 9.67794e6i) q^{92} +(-2.78049e6 - 4.81596e6i) q^{94} +(362825. + 628432. i) q^{95} +(5.30114e6 - 9.18185e6i) q^{97} +2.06665e7 q^{98} +O(q^{100})\)
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 9 q^{2} - 77 q^{4} - 180 q^{5} - 700 q^{7} + 3654 q^{8} + 2790 q^{10} - 10890 q^{11} + 5480 q^{13} - 29475 q^{14} + 15967 q^{16} + 32832 q^{17} + 32048 q^{19} - 12195 q^{20} - 60705 q^{22} - 24372 q^{23}+ \cdots + 45559476 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/81\mathbb{Z}\right)^\times\).

\(n\) \(2\)
\(\chi(n)\) \(e\left(\frac{2}{3}\right)\)

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:
\(n\) \(a_n\) \(a_n / n^{(k-1)/2}\) \( \alpha_n \) \( \theta_n \)
\(p\) \(a_p\) \(a_p / p^{(k-1)/2}\) \( \alpha_p\) \( \theta_p \)
\(2\) −8.29669 + 14.3703i −0.733331 + 1.27017i 0.222121 + 0.975019i \(0.428702\pi\)
−0.955452 + 0.295147i \(0.904631\pi\)
\(3\) 0 0
\(4\) −73.6702 − 127.601i −0.575549 − 0.996880i
\(5\) −57.0934 − 98.8886i −0.204264 − 0.353795i 0.745634 − 0.666355i \(-0.232147\pi\)
−0.949898 + 0.312561i \(0.898813\pi\)
\(6\) 0 0
\(7\) −719.202 + 1245.70i −0.792516 + 1.37268i 0.131889 + 0.991265i \(0.457896\pi\)
−0.924405 + 0.381413i \(0.875437\pi\)
\(8\) 320.924 0.221609
\(9\) 0 0
\(10\) 1894.75 0.599171
\(11\) −2964.37 + 5134.44i −0.671518 + 1.16310i 0.305956 + 0.952046i \(0.401024\pi\)
−0.977474 + 0.211058i \(0.932309\pi\)
\(12\) 0 0
\(13\) 5723.62 + 9913.60i 0.722552 + 1.25150i 0.959974 + 0.280090i \(0.0903643\pi\)
−0.237422 + 0.971407i \(0.576302\pi\)
\(14\) −11934.0 − 20670.3i −1.16235 − 2.01325i
\(15\) 0 0
\(16\) 6767.18 − 11721.1i 0.413036 − 0.715399i
\(17\) −20235.6 −0.998955 −0.499477 − 0.866327i \(-0.666475\pi\)
−0.499477 + 0.866327i \(0.666475\pi\)
\(18\) 0 0
\(19\) −6354.94 −0.212556 −0.106278 − 0.994336i \(-0.533893\pi\)
−0.106278 + 0.994336i \(0.533893\pi\)
\(20\) −8412.17 + 14570.3i −0.235127 + 0.407252i
\(21\) 0 0
\(22\) −49188.9 − 85197.7i −0.984890 − 1.70588i
\(23\) −37922.8 − 65684.2i −0.649910 − 1.12568i −0.983144 − 0.182832i \(-0.941473\pi\)
0.333235 − 0.942844i \(-0.391860\pi\)
\(24\) 0 0
\(25\) 32543.2 − 56366.5i 0.416553 − 0.721491i
\(26\) −189948. −2.11948
\(27\) 0 0
\(28\) 211935. 1.82453
\(29\) 37392.1 − 64765.1i 0.284700 − 0.493115i −0.687836 − 0.725866i \(-0.741439\pi\)
0.972536 + 0.232751i \(0.0747727\pi\)
\(30\) 0 0
\(31\) 94681.4 + 163993.i 0.570820 + 0.988688i 0.996482 + 0.0838064i \(0.0267077\pi\)
−0.425663 + 0.904882i \(0.639959\pi\)
\(32\) 132830. + 230068.i 0.716589 + 1.24117i
\(33\) 0 0
\(34\) 167889. − 290792.i 0.732565 − 1.26884i
\(35\) 164247. 0.647528
\(36\) 0 0
\(37\) −33407.2 −0.108426 −0.0542130 − 0.998529i \(-0.517265\pi\)
−0.0542130 + 0.998529i \(0.517265\pi\)
\(38\) 52725.0 − 91322.4i 0.155874 − 0.269982i
\(39\) 0 0
\(40\) −18322.6 − 31735.7i −0.0452666 − 0.0784041i
\(41\) −70622.4 − 122322.i −0.160029 − 0.277179i 0.774850 − 0.632145i \(-0.217826\pi\)
−0.934879 + 0.354967i \(0.884492\pi\)
\(42\) 0 0
\(43\) 123099. − 213213.i 0.236109 − 0.408954i −0.723485 − 0.690340i \(-0.757461\pi\)
0.959595 + 0.281386i \(0.0907943\pi\)
\(44\) 873543. 1.54597
\(45\) 0 0
\(46\) 1.25854e6 1.90640
\(47\) −167566. + 290234.i −0.235421 + 0.407761i −0.959395 − 0.282067i \(-0.908980\pi\)
0.723974 + 0.689827i \(0.242313\pi\)
\(48\) 0 0
\(49\) −622733. − 1.07860e6i −0.756163 − 1.30971i
\(50\) 540002. + 935310.i 0.610942 + 1.05818i
\(51\) 0 0
\(52\) 843321. − 1.46067e6i 0.831728 − 1.44059i
\(53\) 1.65156e6 1.52381 0.761904 − 0.647691i \(-0.224265\pi\)
0.761904 + 0.647691i \(0.224265\pi\)
\(54\) 0 0
\(55\) 676983. 0.548667
\(56\) −230809. + 399774.i −0.175629 + 0.304198i
\(57\) 0 0
\(58\) 620462. + 1.07467e6i 0.417559 + 0.723233i
\(59\) −1.02411e6 − 1.77382e6i −0.649182 − 1.12442i −0.983319 − 0.181892i \(-0.941778\pi\)
0.334136 − 0.942525i \(-0.391555\pi\)
\(60\) 0 0
\(61\) 295235. − 511361.i 0.166538 − 0.288452i −0.770663 − 0.637243i \(-0.780075\pi\)
0.937200 + 0.348792i \(0.113408\pi\)
\(62\) −3.14217e6 −1.67440
\(63\) 0 0
\(64\) −2.67579e6 −1.27591
\(65\) 653562. − 1.13200e6i 0.295182 − 0.511270i
\(66\) 0 0
\(67\) −26787.7 − 46397.7i −0.0108811 − 0.0188467i 0.860534 − 0.509394i \(-0.170130\pi\)
−0.871415 + 0.490547i \(0.836797\pi\)
\(68\) 1.49076e6 + 2.58208e6i 0.574947 + 0.995838i
\(69\) 0 0
\(70\) −1.36271e6 + 2.36027e6i −0.474853 + 0.822469i
\(71\) −4.95678e6 −1.64360 −0.821798 − 0.569779i \(-0.807029\pi\)
−0.821798 + 0.569779i \(0.807029\pi\)
\(72\) 0 0
\(73\) 817542. 0.245969 0.122984 − 0.992409i \(-0.460753\pi\)
0.122984 + 0.992409i \(0.460753\pi\)
\(74\) 277169. − 480071.i 0.0795121 − 0.137719i
\(75\) 0 0
\(76\) 468170. + 810895.i 0.122337 + 0.211893i
\(77\) −4.26396e6 − 7.38540e6i −1.06438 − 1.84356i
\(78\) 0 0
\(79\) −3.78629e6 + 6.55804e6i −0.864009 + 1.49651i 0.00401783 + 0.999992i \(0.498721\pi\)
−0.868027 + 0.496516i \(0.834612\pi\)
\(80\) −1.54545e6 −0.337473
\(81\) 0 0
\(82\) 2.34373e6 0.469417
\(83\) 509455. − 882402.i 0.0977986 − 0.169392i −0.812975 − 0.582299i \(-0.802153\pi\)
0.910773 + 0.412907i \(0.135487\pi\)
\(84\) 0 0
\(85\) 1.15532e6 + 2.00108e6i 0.204050 + 0.353425i
\(86\) 2.04262e6 + 3.53792e6i 0.346293 + 0.599797i
\(87\) 0 0
\(88\) −951337. + 1.64776e6i −0.148814 + 0.257754i
\(89\) 1.37281e6 0.206418 0.103209 − 0.994660i \(-0.467089\pi\)
0.103209 + 0.994660i \(0.467089\pi\)
\(90\) 0 0
\(91\) −1.64658e7 −2.29054
\(92\) −5.58756e6 + 9.67794e6i −0.748109 + 1.29576i
\(93\) 0 0
\(94\) −2.78049e6 − 4.81596e6i −0.345283 − 0.598047i
\(95\) 362825. + 628432.i 0.0434175 + 0.0752013i
\(96\) 0 0
\(97\) 5.30114e6 − 9.18185e6i 0.589750 − 1.02148i −0.404514 − 0.914532i \(-0.632559\pi\)
0.994265 − 0.106946i \(-0.0341072\pi\)
\(98\) 2.06665e7 2.21807
\(99\) 0 0
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 81.8.c.d.55.1 4
3.2 odd 2 81.8.c.h.55.2 4
9.2 odd 6 27.8.a.b.1.1 ✓ 2
9.4 even 3 inner 81.8.c.d.28.1 4
9.5 odd 6 81.8.c.h.28.2 4
9.7 even 3 27.8.a.e.1.2 yes 2
36.7 odd 6 432.8.a.q.1.2 2
36.11 even 6 432.8.a.j.1.1 2
    
        By twisted newform
Twist Min Dim Char Parity Ord Type
27.8.a.b.1.1 ✓ 2 9.2 odd 6
27.8.a.e.1.2 yes 2 9.7 even 3
81.8.c.d.28.1 4 9.4 even 3 inner
81.8.c.d.55.1 4 1.1 even 1 trivial
81.8.c.h.28.2 4 9.5 odd 6
81.8.c.h.55.2 4 3.2 odd 2
432.8.a.j.1.1 2 36.11 even 6
432.8.a.q.1.2 2 36.7 odd 6