Space of modular forms of level 729, weight 2, and Character 729.g

• Label: 729.2.g
• Level: $729$
• Weight: $2$
• Character orbit: 729.g
• Rep. character: $\chi_{729}(28,\cdot)$
• Character field: $\Q(\zeta_{27})$
• Dimension: $576$
• Newform subspaces: $4$
• Sturm bound: $162$
• Trace bound: $20$

Defining parameters

Level:	$N$	$=$	$729 = 3^{6}$
Weight:	$k$	$=$	$2$
Character orbit:	$[\chi]$	$=$	729.g (of order $27$ and degree $18$)
Character conductor:	$\operatorname{cond}(\chi)$	$=$	$81$
Character field:			$\Q(\zeta_{27})$
Newform subspaces:			$4$
Sturm bound:			$162$
Trace bound:			$20$
Distinguishing $T_p$:			$2$

Dimensions

The following table gives the dimensions of various subspaces of $M_{2}(729, [\chi])$.

	Total	New	Old
Modular forms	1620	720	900
Cusp forms	1296	576	720
Eisenstein series	324	144	180

Trace form

576 * q + 36 * q^4 + 36 * q^7 - 72 * q^10 + 36 * q^13 + 36 * q^16 - 72 * q^19 + 36 * q^22 + 36 * q^25 - 36 * q^28 + 36 * q^31 + 36 * q^34 - 72 * q^37 + 36 * q^40 + 36 * q^43 - 72 * q^46 + 36 * q^49 - 36 * q^55 + 36 * q^58 + 36 * q^61 - 72 * q^64 - 18 * q^67 - 72 * q^70 - 72 * q^73 - 126 * q^76 - 72 * q^79 - 144 * q^82 - 72 * q^85 - 126 * q^88 - 72 * q^91 - 72 * q^94 - 18 * q^97

Decomposition of $S_{2}^{\mathrm{new}}(729, [\chi])$ into newform subspaces

Label	Level	Weight	Char	Prim	Char order	Dim	Rel. Dim	$A$	Field	CM	Self-dual	Twist minimal	Largest	Maximal	Minimal twist	Inner twists	Rank*	Traces				Coefficient ring index	Sato-Tate	$q$-expansion
																		$a_{2}$	$a_{3}$	$a_{5}$	$a_{7}$
729.2.g.a	$729$	$2$	729.g	81.g	$27$	$144$	$8$	$5.821$		None					81.2.g.a	$2$	$0$	$-9$	$0$	$-9$	$9$		$\mathrm{SU}(2)[C_{27}]$
729.2.g.b	$729$	$2$	729.g	81.g	$27$	$144$	$8$	$5.821$		None					81.2.g.a	$2$	$0$	$-9$	$0$	$-9$	$9$		$\mathrm{SU}(2)[C_{27}]$
729.2.g.c	$729$	$2$	729.g	81.g	$27$	$144$	$8$	$5.821$		None					81.2.g.a	$2$	$0$	$9$	$0$	$9$	$9$		$\mathrm{SU}(2)[C_{27}]$
729.2.g.d	$729$	$2$	729.g	81.g	$27$	$144$	$8$	$5.821$		None					81.2.g.a	$2$	$0$	$9$	$0$	$9$	$9$		$\mathrm{SU}(2)[C_{27}]$

Decomposition of $S_{2}^{\mathrm{old}}(729, [\chi])$ into lower level spaces

$S_{2}^{\mathrm{old}}(729, [\chi]) \simeq$ $S_{2}^{\mathrm{new}}(81, [\chi])$$^{\oplus 3}$$\oplus$$S_{2}^{\mathrm{new}}(243, [\chi])$$^{\oplus 2}$