Properties

Label 1815.2
Level 1815
Weight 2
Dimension 77700
Nonzero newspaces 24
Sturm bound 464640
Trace bound 1

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Defining parameters

Level: \( N \) = \( 1815 = 3 \cdot 5 \cdot 11^{2} \)
Weight: \( k \) = \( 2 \)
Nonzero newspaces: \( 24 \)
Sturm bound: \(464640\)
Trace bound: \(1\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(\Gamma_1(1815))\).

Total New Old
Modular forms 118720 79388 39332
Cusp forms 113601 77700 35901
Eisenstein series 5119 1688 3431

Trace form

\( 77700 q - 4 q^{2} - 92 q^{3} - 188 q^{4} - 252 q^{6} - 148 q^{7} + 68 q^{8} - 50 q^{9} + O(q^{10}) \) \( 77700 q - 4 q^{2} - 92 q^{3} - 188 q^{4} - 252 q^{6} - 148 q^{7} + 68 q^{8} - 50 q^{9} - 214 q^{10} + 20 q^{11} - 96 q^{12} - 156 q^{13} + 96 q^{14} - 97 q^{15} - 332 q^{16} + 104 q^{17} - 34 q^{18} - 76 q^{19} + 92 q^{20} - 178 q^{21} - 80 q^{22} + 56 q^{23} - 8 q^{24} - 190 q^{25} + 160 q^{26} - 152 q^{27} - 36 q^{28} + 48 q^{29} - 127 q^{30} - 492 q^{31} + 12 q^{32} - 120 q^{33} - 236 q^{34} + 72 q^{35} - 258 q^{36} - 68 q^{37} + 136 q^{38} - 2 q^{39} - 382 q^{40} + 208 q^{41} - 54 q^{42} - 100 q^{43} + 60 q^{44} - 165 q^{45} - 412 q^{46} - 140 q^{48} - 204 q^{49} - 104 q^{50} - 230 q^{51} - 396 q^{52} - 24 q^{53} - 152 q^{54} - 380 q^{55} - 280 q^{56} - 294 q^{57} - 548 q^{58} - 184 q^{59} - 411 q^{60} - 724 q^{61} - 176 q^{62} - 238 q^{63} - 540 q^{64} - 136 q^{65} - 390 q^{66} - 436 q^{67} - 48 q^{68} - 154 q^{69} - 154 q^{70} + 160 q^{71} - 122 q^{72} + 116 q^{73} + 256 q^{74} + 3 q^{75} + 76 q^{76} + 180 q^{77} - 14 q^{78} + 260 q^{79} + 388 q^{80} - 230 q^{81} + 124 q^{82} + 448 q^{83} - 46 q^{84} - 26 q^{85} + 424 q^{86} + 142 q^{87} + 120 q^{88} + 224 q^{89} - 369 q^{90} - 372 q^{91} + 112 q^{92} - 42 q^{93} - 292 q^{94} - 36 q^{95} - 628 q^{96} - 276 q^{97} - 164 q^{98} - 240 q^{99} + O(q^{100}) \)

Decomposition of \(S_{2}^{\mathrm{new}}(\Gamma_1(1815))\)

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
1815.2.a \(\chi_{1815}(1, \cdot)\) 1815.2.a.a 1 1
1815.2.a.b 1
1815.2.a.c 1
1815.2.a.d 1
1815.2.a.e 1
1815.2.a.f 2
1815.2.a.g 2
1815.2.a.h 2
1815.2.a.i 2
1815.2.a.j 2
1815.2.a.k 2
1815.2.a.l 3
1815.2.a.m 3
1815.2.a.n 3
1815.2.a.o 4
1815.2.a.p 4
1815.2.a.q 4
1815.2.a.r 4
1815.2.a.s 4
1815.2.a.t 4
1815.2.a.u 4
1815.2.a.v 4
1815.2.a.w 4
1815.2.a.x 4
1815.2.a.y 6
1815.2.c \(\chi_{1815}(364, \cdot)\) 1815.2.c.a 2 1
1815.2.c.b 2
1815.2.c.c 4
1815.2.c.d 6
1815.2.c.e 6
1815.2.c.f 8
1815.2.c.g 8
1815.2.c.h 12
1815.2.c.i 12
1815.2.c.j 24
1815.2.c.k 24
1815.2.d \(\chi_{1815}(1814, \cdot)\) n/a 200 1
1815.2.f \(\chi_{1815}(1451, \cdot)\) n/a 144 1
1815.2.j \(\chi_{1815}(967, \cdot)\) n/a 216 2
1815.2.k \(\chi_{1815}(122, \cdot)\) n/a 400 2
1815.2.m \(\chi_{1815}(511, \cdot)\) n/a 288 4
1815.2.p \(\chi_{1815}(161, \cdot)\) n/a 576 4
1815.2.r \(\chi_{1815}(239, \cdot)\) n/a 800 4
1815.2.s \(\chi_{1815}(124, \cdot)\) n/a 432 4
1815.2.u \(\chi_{1815}(166, \cdot)\) n/a 880 10
1815.2.w \(\chi_{1815}(323, \cdot)\) n/a 1600 8
1815.2.x \(\chi_{1815}(112, \cdot)\) n/a 864 8
1815.2.bb \(\chi_{1815}(131, \cdot)\) n/a 1760 10
1815.2.bd \(\chi_{1815}(164, \cdot)\) n/a 2600 10
1815.2.be \(\chi_{1815}(34, \cdot)\) n/a 1320 10
1815.2.bh \(\chi_{1815}(23, \cdot)\) n/a 5200 20
1815.2.bi \(\chi_{1815}(43, \cdot)\) n/a 2640 20
1815.2.bk \(\chi_{1815}(16, \cdot)\) n/a 3520 40
1815.2.bm \(\chi_{1815}(4, \cdot)\) n/a 5280 40
1815.2.bn \(\chi_{1815}(29, \cdot)\) n/a 10400 40
1815.2.bp \(\chi_{1815}(41, \cdot)\) n/a 7040 40
1815.2.bt \(\chi_{1815}(7, \cdot)\) n/a 10560 80
1815.2.bu \(\chi_{1815}(38, \cdot)\) n/a 20800 80

"n/a" means that newforms for that character have not been added to the database yet

Decomposition of \(S_{2}^{\mathrm{old}}(\Gamma_1(1815))\) into lower level spaces

\( S_{2}^{\mathrm{old}}(\Gamma_1(1815)) \cong \) \(S_{2}^{\mathrm{new}}(\Gamma_1(11))\)\(^{\oplus 8}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(15))\)\(^{\oplus 3}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(33))\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(55))\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(121))\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(165))\)\(^{\oplus 2}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(363))\)\(^{\oplus 2}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_1(605))\)\(^{\oplus 2}\)