Properties

Label 171.2
Level 171
Weight 2
Dimension 774
Nonzero newspaces 16
Newform subspaces 32
Sturm bound 4320
Trace bound 4

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Defining parameters

Level: \( N \) = \( 171 = 3^{2} \cdot 19 \)
Weight: \( k \) = \( 2 \)
Nonzero newspaces: \( 16 \)
Newform subspaces: \( 32 \)
Sturm bound: \(4320\)
Trace bound: \(4\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(\Gamma_1(171))\).

Total New Old
Modular forms 1224 926 298
Cusp forms 937 774 163
Eisenstein series 287 152 135

Trace form

\( 774 q - 27 q^{2} - 36 q^{3} - 27 q^{4} - 27 q^{5} - 36 q^{6} - 27 q^{7} - 27 q^{8} - 36 q^{9} + O(q^{10}) \) \( 774 q - 27 q^{2} - 36 q^{3} - 27 q^{4} - 27 q^{5} - 36 q^{6} - 27 q^{7} - 27 q^{8} - 36 q^{9} - 81 q^{10} - 27 q^{11} - 36 q^{12} - 39 q^{13} - 45 q^{14} - 36 q^{15} - 63 q^{16} - 36 q^{17} - 36 q^{18} - 102 q^{19} - 90 q^{20} - 36 q^{21} - 54 q^{22} - 36 q^{23} - 36 q^{24} - 45 q^{25} - 45 q^{26} - 36 q^{27} - 120 q^{28} - 45 q^{29} - 36 q^{30} - 45 q^{31} - 72 q^{32} - 36 q^{33} - 72 q^{34} - 63 q^{35} - 108 q^{37} - 90 q^{38} - 72 q^{39} - 108 q^{40} - 45 q^{41} - 36 q^{42} - 54 q^{43} + 9 q^{44} + 18 q^{45} - 18 q^{46} + 36 q^{47} + 90 q^{48} + 18 q^{49} + 162 q^{50} + 54 q^{51} + 171 q^{52} + 81 q^{53} + 72 q^{54} + 27 q^{55} + 324 q^{56} + 54 q^{57} + 54 q^{58} + 108 q^{59} + 180 q^{60} + 51 q^{61} + 90 q^{62} + 36 q^{63} + 45 q^{64} + 54 q^{65} + 108 q^{66} - 36 q^{67} + 99 q^{68} + 18 q^{69} - 27 q^{70} + 18 q^{71} + 18 q^{72} - 153 q^{73} - 45 q^{74} - 36 q^{75} - 117 q^{76} - 153 q^{77} - 36 q^{78} - 129 q^{79} - 45 q^{80} - 36 q^{81} - 252 q^{82} - 90 q^{83} - 36 q^{84} - 135 q^{85} - 126 q^{86} - 36 q^{87} - 189 q^{88} - 108 q^{89} + 54 q^{90} - 165 q^{91} - 144 q^{92} - 36 q^{93} - 72 q^{94} + 54 q^{95} + 72 q^{96} + 54 q^{97} + 198 q^{98} + 90 q^{99} + O(q^{100}) \)

Decomposition of \(S_{2}^{\mathrm{new}}(\Gamma_1(171))\)

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
171.2.a \(\chi_{171}(1, \cdot)\) 171.2.a.a 1 1
171.2.a.b 1
171.2.a.c 1
171.2.a.d 1
171.2.a.e 4
171.2.d \(\chi_{171}(170, \cdot)\) 171.2.d.a 4 1
171.2.d.b 4
171.2.e \(\chi_{171}(58, \cdot)\) 171.2.e.a 18 2
171.2.e.b 18
171.2.f \(\chi_{171}(64, \cdot)\) 171.2.f.a 2 2
171.2.f.b 6
171.2.f.c 8
171.2.g \(\chi_{171}(106, \cdot)\) 171.2.g.a 2 2
171.2.g.b 2
171.2.g.c 32
171.2.h \(\chi_{171}(7, \cdot)\) 171.2.h.a 2 2
171.2.h.b 2
171.2.h.c 32
171.2.k \(\chi_{171}(50, \cdot)\) 171.2.k.a 36 2
171.2.l \(\chi_{171}(56, \cdot)\) 171.2.l.a 36 2
171.2.m \(\chi_{171}(8, \cdot)\) 171.2.m.a 16 2
171.2.t \(\chi_{171}(122, \cdot)\) 171.2.t.a 36 2
171.2.u \(\chi_{171}(28, \cdot)\) 171.2.u.a 6 6
171.2.u.b 6
171.2.u.c 6
171.2.u.d 12
171.2.u.e 12
171.2.v \(\chi_{171}(25, \cdot)\) 171.2.v.a 108 6
171.2.w \(\chi_{171}(4, \cdot)\) 171.2.w.a 108 6
171.2.x \(\chi_{171}(14, \cdot)\) 171.2.x.a 108 6
171.2.y \(\chi_{171}(53, \cdot)\) 171.2.y.a 36 6
171.2.bd \(\chi_{171}(2, \cdot)\) 171.2.bd.a 108 6

Decomposition of \(S_{2}^{\mathrm{old}}(\Gamma_1(171))\) into lower level spaces

\( S_{2}^{\mathrm{old}}(\Gamma_1(171)) \cong \) \(S_{2}^{\mathrm{new}}(\Gamma_1(19))\)\(^{\oplus 3}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(57))\)\(^{\oplus 2}\)