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Properties

Label 231.2
Level 231
Weight 2
Dimension 1271
Nonzero newspaces 16
Newform subspaces 33
Sturm bound 7680
Trace bound 3

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Defining parameters

Level: \( N \) = \( 231 = 3 \cdot 7 \cdot 11 \)
Weight: \( k \) = \( 2 \)
Nonzero newspaces: \( 16 \)
Newform subspaces: \( 33 \)
Sturm bound: \(7680\)
Trace bound: \(3\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(\Gamma_1(231))\).

Total New Old
Modular forms 2160 1447 713
Cusp forms 1681 1271 410
Eisenstein series 479 176 303

Trace form

\( 1271 q + 9 q^{2} - 13 q^{3} - 23 q^{4} + 6 q^{5} - 33 q^{6} - 49 q^{7} - 31 q^{8} - 45 q^{9} + O(q^{10}) \) \( 1271 q + 9 q^{2} - 13 q^{3} - 23 q^{4} + 6 q^{5} - 33 q^{6} - 49 q^{7} - 31 q^{8} - 45 q^{9} - 94 q^{10} - 15 q^{11} - 79 q^{12} - 46 q^{13} - 33 q^{14} - 72 q^{15} - 127 q^{16} - 30 q^{17} - 41 q^{18} - 68 q^{19} - 46 q^{20} - 43 q^{21} - 175 q^{22} - 16 q^{23} - 61 q^{24} - 99 q^{25} - 58 q^{26} + 5 q^{27} - 127 q^{28} - 22 q^{29} - 24 q^{30} - 60 q^{31} + 17 q^{32} + 5 q^{33} - 118 q^{34} - 34 q^{35} - 35 q^{36} - 86 q^{37} - 28 q^{38} - 56 q^{39} - 158 q^{40} - 42 q^{41} - 39 q^{42} - 188 q^{43} - 143 q^{44} - 124 q^{45} - 228 q^{46} - 104 q^{47} - 121 q^{48} - 157 q^{49} - 121 q^{50} - 100 q^{51} - 190 q^{52} - 74 q^{53} - 41 q^{54} - 134 q^{55} - 99 q^{56} - 68 q^{57} - 118 q^{58} - 48 q^{59} + 140 q^{60} - 18 q^{61} + 24 q^{62} + 51 q^{63} + 53 q^{64} + 132 q^{65} + 263 q^{66} + 12 q^{67} + 274 q^{68} + 134 q^{69} + 214 q^{70} + 216 q^{71} + 359 q^{72} + 94 q^{73} + 198 q^{74} + 191 q^{75} + 380 q^{76} + 113 q^{77} + 70 q^{78} - 36 q^{79} + 378 q^{80} + 219 q^{81} + 70 q^{82} + 4 q^{83} + 283 q^{84} - 36 q^{85} + 224 q^{86} + 42 q^{87} + 153 q^{88} + 110 q^{89} + 120 q^{90} + 22 q^{91} + 68 q^{92} - 10 q^{93} - 100 q^{94} - 108 q^{95} + 147 q^{96} - 194 q^{97} - 223 q^{98} - 99 q^{99} + O(q^{100}) \)

Display 100 coefficients 10 coefficients

Decomposition of \(S_{2}^{\mathrm{new}}(\Gamma_1(231))\)

We only show spaces with even parity, since no modular forms exist when this condition is not satisfied. Within each space \( S_k^{\mathrm{new}}(N, \chi) \) we list the newforms together with their dimension.

Label \(\chi\) Newforms Dimension \(\chi\) degree
231.2.a \(\chi_{231}(1, \cdot)\) 231.2.a.a 1 1
231.2.a.b 2
231.2.a.c 2
231.2.a.d 3
231.2.a.e 3
231.2.c \(\chi_{231}(76, \cdot)\) 231.2.c.a 16 1
231.2.e \(\chi_{231}(188, \cdot)\) 231.2.e.a 28 1
231.2.g \(\chi_{231}(197, \cdot)\) 231.2.g.a 24 1
231.2.i \(\chi_{231}(67, \cdot)\) 231.2.i.a 2 2
231.2.i.b 2
231.2.i.c 2
231.2.i.d 4
231.2.i.e 8
231.2.i.f 10
231.2.j \(\chi_{231}(64, \cdot)\) 231.2.j.a 4 4
231.2.j.b 4
231.2.j.c 4
231.2.j.d 4
231.2.j.e 4
231.2.j.f 8
231.2.j.g 20
231.2.l \(\chi_{231}(32, \cdot)\) 231.2.l.a 8 2
231.2.l.b 48
231.2.n \(\chi_{231}(89, \cdot)\) 231.2.n.a 52 2
231.2.p \(\chi_{231}(10, \cdot)\) 231.2.p.a 32 2
231.2.s \(\chi_{231}(8, \cdot)\) 231.2.s.a 96 4
231.2.u \(\chi_{231}(20, \cdot)\) 231.2.u.a 112 4
231.2.w \(\chi_{231}(13, \cdot)\) 231.2.w.a 64 4
231.2.y \(\chi_{231}(4, \cdot)\) 231.2.y.a 64 8
231.2.y.b 64
231.2.ba \(\chi_{231}(19, \cdot)\) 231.2.ba.a 128 8
231.2.bc \(\chi_{231}(5, \cdot)\) 231.2.bc.a 224 8
231.2.be \(\chi_{231}(2, \cdot)\) 231.2.be.a 224 8

Decomposition of \(S_{2}^{\mathrm{old}}(\Gamma_1(231))\) into lower level spaces

\( S_{2}^{\mathrm{old}}(\Gamma_1(231)) \cong \) \(S_{2}^{\mathrm{new}}(\Gamma_1(11))\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(21))\)\(^{\oplus 2}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(33))\)\(^{\oplus 2}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(77))\)\(^{\oplus 2}\)