Space of modular forms of level 648, weight 2, and Character 648.bb

• Label: 648.2.bb
• Level: $648$
• Weight: $2$
• Character orbit: 648.bb
• Rep. character: $\chi_{648}(11,\cdot)$
• Character field: $\Q(\zeta_{54})$
• Dimension: $1908$
• Newform subspaces: $2$
• Sturm bound: $216$
• Trace bound: $1$

Defining parameters

Level:	\( N \)	\(=\)	\( 648 = 2^{3} \cdot 3^{4} \)
Weight:	\( k \)	\(=\)	\( 2 \)
Character orbit:	\([\chi]\)	\(=\)	648.bb (of order \(54\) and degree \(18\))
Character conductor:	\(\operatorname{cond}(\chi)\)	\(=\)	\( 648 \)
Character field:			\(\Q(\zeta_{54})\)
Newform subspaces:			\( 2 \)
Sturm bound:			\(216\)
Trace bound:			\(1\)
Distinguishing \(T_p\):			\(5\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(648, [\chi])\).

	Total	New	Old
Modular forms	1980	1980	0
Cusp forms	1908	1908	0
Eisenstein series	72	72	0

Trace form

1908 * q - 18 * q^2 - 36 * q^3 - 18 * q^4 - 18 * q^6 - 18 * q^8 - 36 * q^9 - 18 * q^10 - 36 * q^11 - 18 * q^12 - 18 * q^14 - 18 * q^16 - 36 * q^17 - 18 * q^18 - 36 * q^19 - 18 * q^20 - 18 * q^22 - 18 * q^24 - 36 * q^25 - 27 * q^26 - 36 * q^27 - 9 * q^28 - 18 * q^30 - 18 * q^32 - 36 * q^33 - 18 * q^34 - 36 * q^35 - 18 * q^36 - 18 * q^38 - 18 * q^40 - 36 * q^41 - 63 * q^42 - 36 * q^43 + 54 * q^44 - 18 * q^46 + 81 * q^48 - 36 * q^49 - 135 * q^50 - 36 * q^51 - 18 * q^52 - 144 * q^54 + 108 * q^56 - 36 * q^57 - 18 * q^58 - 36 * q^59 + 99 * q^60 - 117 * q^62 - 18 * q^64 - 36 * q^65 - 90 * q^66 - 36 * q^67 + 27 * q^68 - 18 * q^70 - 18 * q^72 - 36 * q^73 - 18 * q^74 - 36 * q^75 - 18 * q^76 - 45 * q^78 - 36 * q^81 - 36 * q^82 - 36 * q^83 + 9 * q^84 - 18 * q^86 - 18 * q^88 - 36 * q^89 - 81 * q^90 - 36 * q^91 - 108 * q^92 - 18 * q^94 - 135 * q^96 - 36 * q^97 - 189 * q^98 - 36 * q^99

Decomposition of \(S_{2}^{\mathrm{new}}(648, [\chi])\) 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
																		$a_{2}$	$a_{3}$	$a_{5}$	$a_{7}$
648.2.bb.a	$648$	$2$	648.bb	648.ab	$54$	$36$	$2$	$5.174$		\(\Q(\sqrt{-2}) \)		✓			648.2.bb.a	$4$	$0$	\(0\)	\(0\)	\(0\)	\(0\)		$\mathrm{U}(1)[D_{54}]$
648.2.bb.b	$648$	$2$	648.bb	648.ab	$54$	$1872$	$104$	$5.174$		None		✓	✓		648.2.bb.b	$4$	$0$	\(-18\)	\(-36\)	\(0\)	\(0\)		$\mathrm{SU}(2)[C_{54}]$