Space of modular forms of level 306, weight 2, and Character 306.b

• Label: 306.2.b
• Level: $306$
• Weight: $2$
• Character orbit: 306.b
• Rep. character: $\chi_{306}(271,\cdot)$
• Character field: $\Q$
• Dimension: $8$
• Newform subspaces: $4$
• Sturm bound: $108$
• Trace bound: $17$

Defining parameters

Level:	\( N \)	\(=\)	\( 306 = 2 \cdot 3^{2} \cdot 17 \)
Weight:	\( k \)	\(=\)	\( 2 \)
Character orbit:	\([\chi]\)	\(=\)	306.b (of order \(2\) and degree \(1\))
Character conductor:	\(\operatorname{cond}(\chi)\)	\(=\)	\( 17 \)
Character field:			\(\Q\)
Newform subspaces:			\( 4 \)
Sturm bound:			\(108\)
Trace bound:			\(17\)
Distinguishing \(T_p\):			\(5\), \(47\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(306, [\chi])\).

	Total	New	Old
Modular forms	62	8	54
Cusp forms	46	8	38
Eisenstein series	16	0	16

Trace form

\( 8 q + 8 q^{4} + O(q^{10}) \)

Decomposition of \(S_{2}^{\mathrm{new}}(306, [\chi])\) 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
														$a_{2}$	$a_{3}$	$a_{5}$	$a_{7}$
306.2.b.a	$306$	$2$	306.b	17.b	$2$	$2$	$2$	$2.443$	\(\Q(\sqrt{-1}) \)	None		$2$	$0$	\(-2\)	\(0\)	\(0\)	\(0\)	$2$	$\mathrm{SU}(2)[C_{2}]$	\(q-q^{2}+q^{4}+iq^{5}+iq^{7}-q^{8}-iq^{10}+\cdots\)
306.2.b.b	$306$	$2$	306.b	17.b	$2$	$2$	$2$	$2.443$	\(\Q(\sqrt{-2}) \)	None		$2$	$0$	\(-2\)	\(0\)	\(0\)	\(0\)	$1$	$\mathrm{SU}(2)[C_{2}]$	\(q-q^{2}+q^{4}+\beta q^{5}-3\beta q^{7}-q^{8}-\beta q^{10}+\cdots\)
306.2.b.c	$306$	$2$	306.b	17.b	$2$	$2$	$2$	$2.443$	\(\Q(\sqrt{-2}) \)	None		$2$	$0$	\(2\)	\(0\)	\(0\)	\(0\)	$1$	$\mathrm{SU}(2)[C_{2}]$	\(q+q^{2}+q^{4}+\beta q^{5}+3\beta q^{7}+q^{8}+\beta q^{10}+\cdots\)
306.2.b.d	$306$	$2$	306.b	17.b	$2$	$2$	$2$	$2.443$	\(\Q(\sqrt{-2}) \)	None		$2$	$0$	\(2\)	\(0\)	\(0\)	\(0\)	$2$	$\mathrm{SU}(2)[C_{2}]$	\(q+q^{2}+q^{4}+\beta q^{5}+q^{8}+\beta q^{10}+\beta q^{11}+\cdots\)

Decomposition of \(S_{2}^{\mathrm{old}}(306, [\chi])\) into lower level spaces

\( S_{2}^{\mathrm{old}}(306, [\chi]) \cong \) \(S_{2}^{\mathrm{new}}(34, [\chi])\)\(^{\oplus 3}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(51, [\chi])\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(153, [\chi])\)\(^{\oplus 2}\)