# Properties

 Label 756.2.cd Level 756 Weight 2 Character orbit cd Rep. character $$\chi_{756}(31,\cdot)$$ Character field $$\Q(\zeta_{18})$$ Dimension 840 Newform subspaces 1 Sturm bound 288 Trace bound 0

# Related objects

## Defining parameters

 Level: $$N$$ = $$756 = 2^{2} \cdot 3^{3} \cdot 7$$ Weight: $$k$$ = $$2$$ Character orbit: $$[\chi]$$ = 756.cd (of order $$18$$ and degree $$6$$) Character conductor: $$\operatorname{cond}(\chi)$$ = $$756$$ Character field: $$\Q(\zeta_{18})$$ Newform subspaces: $$1$$ Sturm bound: $$288$$ Trace bound: $$0$$

## Dimensions

The following table gives the dimensions of various subspaces of $$M_{2}(756, [\chi])$$.

Total New Old
Modular forms 888 888 0
Cusp forms 840 840 0
Eisenstein series 48 48 0

## Trace form

 $$840q - 3q^{2} - 3q^{4} - 18q^{5} - 6q^{8} - 6q^{9} + O(q^{10})$$ $$840q - 3q^{2} - 3q^{4} - 18q^{5} - 6q^{8} - 6q^{9} - 9q^{10} - 9q^{12} + 24q^{14} - 3q^{16} - 18q^{17} - 3q^{18} - 12q^{21} - 12q^{22} - 36q^{24} - 6q^{25} - 18q^{26} - 12q^{28} - 36q^{29} + 15q^{30} - 63q^{32} - 18q^{33} - 18q^{34} + 18q^{36} - 12q^{37} - 9q^{38} - 9q^{40} + 9q^{42} - 6q^{44} + 18q^{45} - 6q^{46} - 12q^{49} + 3q^{50} - 9q^{52} - 12q^{53} - 135q^{54} + 15q^{56} - 42q^{57} - 3q^{58} + 57q^{60} - 18q^{61} + 99q^{62} - 6q^{64} - 54q^{65} - 9q^{66} - 54q^{68} - 72q^{69} + 9q^{70} + 87q^{72} - 69q^{74} + 36q^{76} - 36q^{77} + 6q^{78} - 18q^{80} + 42q^{81} - 18q^{82} - 87q^{84} + 6q^{85} - 117q^{86} + 21q^{88} - 18q^{89} - 81q^{90} + 48q^{92} - 6q^{93} - 9q^{94} - 9q^{96} + 54q^{98} + O(q^{100})$$

## Decomposition of $$S_{2}^{\mathrm{new}}(756, [\chi])$$ into newform subspaces

Label Dim. $$A$$ Field CM Traces $q$-expansion
$$a_2$$ $$a_3$$ $$a_5$$ $$a_7$$
756.2.cd.a $$840$$ $$6.037$$ None $$-3$$ $$0$$ $$-18$$ $$0$$

## Hecke Characteristic Polynomials

There are no characteristic polynomials of Hecke operators in the database