Space of modular forms of level 608, weight 2, and trivial character

• Label: 608.2.a
• Level: $608$
• Weight: $2$
• Character orbit: 608.a
• Rep. character: $\chi_{608}(1,\cdot)$
• Character field: $\Q$
• Dimension: $18$
• Newform subspaces: $10$
• Sturm bound: $160$
• Trace bound: $7$

Defining parameters

Level:	\( N \)	\(=\)	\( 608 = 2^{5} \cdot 19 \)
Weight:	\( k \)	\(=\)	\( 2 \)
Character orbit:	\([\chi]\)	\(=\)	608.a (trivial)
Character field:			\(\Q\)
Newform subspaces:			\( 10 \)
Sturm bound:			\(160\)
Trace bound:			\(7\)
Distinguishing \(T_p\):			\(3\), \(5\), \(7\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(\Gamma_0(608))\).

	Total	New	Old
Modular forms	88	18	70
Cusp forms	73	18	55
Eisenstein series	15	0	15

The following table gives the dimensions of the cuspidal new subspaces with specified eigenvalues for the Atkin-Lehner operators and the Fricke involution.

\(2\)	\(19\)	Fricke	Dim.
\(+\)	\(+\)	\(+\)	\(3\)
\(+\)	\(-\)	\(-\)	\(6\)
\(-\)	\(+\)	\(-\)	\(6\)
\(-\)	\(-\)	\(+\)	\(3\)
Plus space		\(+\)	\(6\)
Minus space		\(-\)	\(12\)

Trace form

\( 18q + 4q^{5} + 18q^{9} + O(q^{10}) \)

Decomposition of \(S_{2}^{\mathrm{new}}(\Gamma_0(608))\) into newform subspaces

Label	Dim.	\(A\)	Field	CM	Traces					A-L signs		$q$-expansion
					\(a_2\)	\(a_3\)	\(a_5\)	\(a_7\)		2	19
608.2.a.a	\(1\)	\(4.855\)	\(\Q\)	None	\(0\)	\(-3\)	\(0\)	\(1\)		\(-\)	\(-\)	\(q-3q^{3}+q^{7}+6q^{9}-2q^{11}-q^{13}+\cdots\)
608.2.a.b	\(1\)	\(4.855\)	\(\Q\)	None	\(0\)	\(0\)	\(-1\)	\(-1\)		\(-\)	\(-\)	\(q-q^{5}-q^{7}-3q^{9}+3q^{11}-4q^{13}+\cdots\)
608.2.a.c	\(1\)	\(4.855\)	\(\Q\)	None	\(0\)	\(0\)	\(-1\)	\(1\)		\(+\)	\(+\)	\(q-q^{5}+q^{7}-3q^{9}-3q^{11}-4q^{13}+\cdots\)
608.2.a.d	\(1\)	\(4.855\)	\(\Q\)	None	\(0\)	\(0\)	\(3\)	\(-5\)		\(-\)	\(-\)	\(q+3q^{5}-5q^{7}-3q^{9}-5q^{11}-4q^{13}+\cdots\)
608.2.a.e	\(1\)	\(4.855\)	\(\Q\)	None	\(0\)	\(0\)	\(3\)	\(5\)		\(-\)	\(+\)	\(q+3q^{5}+5q^{7}-3q^{9}+5q^{11}-4q^{13}+\cdots\)
608.2.a.f	\(1\)	\(4.855\)	\(\Q\)	None	\(0\)	\(3\)	\(0\)	\(-1\)		\(-\)	\(+\)	\(q+3q^{3}-q^{7}+6q^{9}+2q^{11}-q^{13}+\cdots\)
608.2.a.g	\(2\)	\(4.855\)	\(\Q(\sqrt{17}) \)	None	\(0\)	\(-1\)	\(-1\)	\(-6\)		\(+\)	\(+\)	\(q-\beta q^{3}+(-1+\beta )q^{5}-3q^{7}+(1+\beta )q^{9}+\cdots\)
608.2.a.h	\(2\)	\(4.855\)	\(\Q(\sqrt{17}) \)	None	\(0\)	\(1\)	\(-1\)	\(6\)		\(+\)	\(-\)	\(q+\beta q^{3}+(-1+\beta )q^{5}+3q^{7}+(1+\beta )q^{9}+\cdots\)
608.2.a.i	\(4\)	\(4.855\)	4.4.15317.1	None	\(0\)	\(-2\)	\(1\)	\(1\)		\(-\)	\(+\)	\(q+(-1-\beta _{2})q^{3}-\beta _{1}q^{5}+(-\beta _{2}+\beta _{3})q^{7}+\cdots\)
608.2.a.j	\(4\)	\(4.855\)	4.4.15317.1	None	\(0\)	\(2\)	\(1\)	\(-1\)		\(+\)	\(-\)	\(q+(1+\beta _{2})q^{3}+(\beta _{1}-\beta _{2})q^{5}+\beta _{3}q^{7}+\cdots\)

Decomposition of \(S_{2}^{\mathrm{old}}(\Gamma_0(608))\) into lower level spaces

\( S_{2}^{\mathrm{old}}(\Gamma_0(608)) \cong \) \(S_{2}^{\mathrm{new}}(\Gamma_0(19))\)\(^{\oplus 6}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(32))\)\(^{\oplus 2}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(38))\)\(^{\oplus 5}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(76))\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(152))\)\(^{\oplus 3}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(304))\)\(^{\oplus 2}\)