Space of modular forms of level 387, weight 3, and Character 387.r

• Label: 387.3.r
• Level: $387$
• Weight: $3$
• Character orbit: 387.r
• Rep. character: $\chi_{387}(7,\cdot)$
• Character field: $\Q(\zeta_{6})$
• Dimension: $172$
• Newform subspaces: $1$
• Sturm bound: $132$
• Trace bound: $0$

Defining parameters

Level:	\( N \)	\(=\)	\( 387 = 3^{2} \cdot 43 \)
Weight:	\( k \)	\(=\)	\( 3 \)
Character orbit:	\([\chi]\)	\(=\)	387.r (of order \(6\) and degree \(2\))
Character conductor:	\(\operatorname{cond}(\chi)\)	\(=\)	\( 387 \)
Character field:			\(\Q(\zeta_{6})\)
Newform subspaces:			\( 1 \)
Sturm bound:			\(132\)
Trace bound:			\(0\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{3}(387, [\chi])\).

	Total	New	Old
Modular forms	180	180	0
Cusp forms	172	172	0
Eisenstein series	8	8	0

Trace form

\( 172 q - 3 q^{3} + 166 q^{4} - 3 q^{5} - 9 q^{6} - 3 q^{7} + 15 q^{9} + O(q^{10}) \)

Decomposition of \(S_{3}^{\mathrm{new}}(387, [\chi])\) into newform subspaces

Label	Level	Weight	Char	Prim	Char order	Dim	Rel. Dim	$A$	Field	CM	Self-dual	Inner twists	Rank*	Traces				Coefficient ring index	Sato-Tate	$q$-expansion
														$a_{2}$	$a_{3}$	$a_{5}$	$a_{7}$
387.3.r.a	$387$	$3$	387.r	387.r	$6$	$172$	$86$	$10.545$		None		$2$	$0$	\(0\)	\(-3\)	\(-3\)	\(-3\)		$\mathrm{SU}(2)[C_{6}]$