# Properties

 Label 48.2.j Level $48$ Weight $2$ Character orbit 48.j Rep. character $\chi_{48}(13,\cdot)$ Character field $\Q(\zeta_{4})$ Dimension $8$ Newform subspaces $1$ Sturm bound $16$ Trace bound $0$

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## Defining parameters

 Level: $$N$$ $$=$$ $$48 = 2^{4} \cdot 3$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 48.j (of order $$4$$ and degree $$2$$) Character conductor: $$\operatorname{cond}(\chi)$$ $$=$$ $$16$$ Character field: $$\Q(i)$$ Newform subspaces: $$1$$ Sturm bound: $$16$$ Trace bound: $$0$$

## Dimensions

The following table gives the dimensions of various subspaces of $$M_{2}(48, [\chi])$$.

Total New Old
Modular forms 20 8 12
Cusp forms 12 8 4
Eisenstein series 8 0 8

## Trace form

 $$8q - 4q^{4} - 12q^{8} + O(q^{10})$$ $$8q - 4q^{4} - 12q^{8} - 8q^{10} - 8q^{11} + 8q^{12} + 12q^{14} - 8q^{15} + 4q^{18} - 8q^{19} + 16q^{20} + 4q^{24} + 20q^{26} + 8q^{28} - 16q^{29} - 8q^{30} + 24q^{31} + 24q^{35} - 4q^{36} - 16q^{37} - 8q^{38} + 16q^{40} - 20q^{42} - 8q^{43} - 40q^{44} - 8q^{46} - 16q^{48} - 8q^{49} - 36q^{50} + 8q^{51} - 16q^{52} + 16q^{53} + 4q^{54} - 16q^{58} + 32q^{59} + 24q^{60} + 16q^{61} - 12q^{62} + 8q^{63} + 8q^{64} - 16q^{65} + 24q^{66} - 16q^{67} + 32q^{68} + 16q^{69} + 32q^{70} - 4q^{72} + 52q^{74} + 16q^{75} + 8q^{76} + 16q^{77} - 12q^{78} - 24q^{79} + 8q^{80} - 8q^{81} + 40q^{82} - 40q^{83} - 24q^{84} - 16q^{85} - 16q^{86} + 32q^{88} - 8q^{90} - 8q^{91} - 16q^{92} + 8q^{94} - 48q^{95} - 40q^{98} - 8q^{99} + O(q^{100})$$

## Decomposition of $$S_{2}^{\mathrm{new}}(48, [\chi])$$ into newform subspaces

Label Dim. $$A$$ Field CM Traces $q$-expansion
$$a_2$$ $$a_3$$ $$a_5$$ $$a_7$$
48.2.j.a $$8$$ $$0.383$$ 8.0.18939904.2 None $$0$$ $$0$$ $$0$$ $$0$$ $$q+(-\beta _{4}+\beta _{5})q^{2}-\beta _{5}q^{3}+(-1+\beta _{2}+\cdots)q^{4}+\cdots$$

## Decomposition of $$S_{2}^{\mathrm{old}}(48, [\chi])$$ into lower level spaces

$$S_{2}^{\mathrm{old}}(48, [\chi]) \cong$$ $$S_{2}^{\mathrm{new}}(16, [\chi])$$$$^{\oplus 2}$$