Space of modular forms of level 1521, weight 2, and trivial character

• Label: 1521.2.a
• Level: $1521$
• Weight: $2$
• Character orbit: 1521.a
• Rep. character: $\chi_{1521}(1,\cdot)$
• Character field: $\Q$
• Dimension: $59$
• Newform subspaces: $23$
• Sturm bound: $364$
• Trace bound: $23$

Defining parameters

Level:	\( N \)	\(=\)	\( 1521 = 3^{2} \cdot 13^{2} \)
Weight:	\( k \)	\(=\)	\( 2 \)
Character orbit:	\([\chi]\)	\(=\)	1521.a (trivial)
Character field:			\(\Q\)
Newform subspaces:			\( 23 \)
Sturm bound:			\(364\)
Trace bound:			\(23\)
Distinguishing \(T_p\):			\(2\), \(5\), \(7\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(\Gamma_0(1521))\).

	Total	New	Old
Modular forms	210	70	140
Cusp forms	155	59	96
Eisenstein series	55	11	44

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

\(3\)	\(13\)	Fricke	Dim
\(+\)	\(+\)	$+$	\(10\)
\(+\)	\(-\)	$-$	\(16\)
\(-\)	\(+\)	$-$	\(18\)
\(-\)	\(-\)	$+$	\(15\)
Plus space		\(+\)	\(25\)
Minus space		\(-\)	\(34\)

Trace form

\( 59 q - q^{2} + 55 q^{4} + 2 q^{5} - 9 q^{8} + O(q^{10}) \)

Decomposition of \(S_{2}^{\mathrm{new}}(\Gamma_0(1521))\) into newform subspaces

Label	Level	Weight	Char	Prim	Char order	Dim	Rel. Dim	$A$	Field	CM	Self-dual	Inner twists	Rank*	Traces					A-L signs		Fricke sign	Coefficient ring index	Sato-Tate	$q$-expansion
														$a_{2}$	$a_{3}$	$a_{5}$	$a_{7}$		3	13
1521.2.a.a	$1521$	$2$	1521.a	1.a	$1$	$1$	$1$	$12.145$	\(\Q\)	None	✓	$1$	$0$	\(-1\)	\(0\)	\(1\)	\(2\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q-q^{2}-q^{4}+q^{5}+2q^{7}+3q^{8}-q^{10}+\cdots\)
1521.2.a.b	$1521$	$2$	1521.a	1.a	$1$	$1$	$1$	$12.145$	\(\Q\)	\(\Q(\sqrt{-3}) \)	✓	$2$	$1$	\(0\)	\(0\)	\(0\)	\(-1\)		$+$	$+$	$+$	$1$	$N(\mathrm{U}(1))$	\(q-2q^{4}-q^{7}+4q^{16}+8q^{19}-5q^{25}+\cdots\)
1521.2.a.c	$1521$	$2$	1521.a	1.a	$1$	$1$	$1$	$12.145$	\(\Q\)	\(\Q(\sqrt{-3}) \)	✓	$2$	$1$	\(0\)	\(0\)	\(0\)	\(1\)		$+$	$+$	$+$	$1$	$N(\mathrm{U}(1))$	\(q-2q^{4}+q^{7}+4q^{16}-8q^{19}-5q^{25}+\cdots\)
1521.2.a.d	$1521$	$2$	1521.a	1.a	$1$	$1$	$1$	$12.145$	\(\Q\)	None	✓	$1$	$0$	\(1\)	\(0\)	\(-1\)	\(-2\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q+q^{2}-q^{4}-q^{5}-2q^{7}-3q^{8}-q^{10}+\cdots\)
1521.2.a.e	$1521$	$2$	1521.a	1.a	$1$	$1$	$1$	$12.145$	\(\Q\)	None	✓	$1$	$0$	\(1\)	\(0\)	\(2\)	\(4\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q+q^{2}-q^{4}+2q^{5}+4q^{7}-3q^{8}+2q^{10}+\cdots\)
1521.2.a.f	$1521$	$2$	1521.a	1.a	$1$	$2$	$2$	$12.145$	\(\Q(\sqrt{2}) \)	None	✓	$1$	$0$	\(-2\)	\(0\)	\(0\)	\(0\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q+(-1+\beta )q^{2}+(1-2\beta )q^{4}-2\beta q^{5}+\cdots\)
1521.2.a.g	$1521$	$2$	1521.a	1.a	$1$	$2$	$2$	$12.145$	\(\Q(\sqrt{17}) \)	None	✓	$1$	$0$	\(-1\)	\(0\)	\(3\)	\(-3\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q-\beta q^{2}+(2+\beta )q^{4}+(2-\beta )q^{5}+(-1+\cdots)q^{7}+\cdots\)
1521.2.a.h	$1521$	$2$	1521.a	1.a	$1$	$2$	$2$	$12.145$	\(\Q(\sqrt{3}) \)	None	✓	$2$	$1$	\(0\)	\(0\)	\(0\)	\(0\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q-2q^{4}+2\beta q^{5}-\beta q^{7}-2\beta q^{11}+4q^{16}+\cdots\)
1521.2.a.i	$1521$	$2$	1521.a	1.a	$1$	$2$	$2$	$12.145$	\(\Q(\sqrt{3}) \)	\(\Q(\sqrt{-3}) \)	✓	$4$	$0$	\(0\)	\(0\)	\(0\)	\(0\)		$+$	$-$	$-$	$1$	$N(\mathrm{U}(1))$	\(q-2q^{4}-3\beta q^{7}+4q^{16}-2\beta q^{19}+\cdots\)
1521.2.a.j	$1521$	$2$	1521.a	1.a	$1$	$2$	$2$	$12.145$	\(\Q(\sqrt{3}) \)	None	✓	$2$	$1$	\(0\)	\(0\)	\(0\)	\(-4\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q+\beta q^{2}+q^{4}-2q^{7}-\beta q^{8}-2\beta q^{11}+\cdots\)
1521.2.a.k	$1521$	$2$	1521.a	1.a	$1$	$2$	$2$	$12.145$	\(\Q(\sqrt{3}) \)	None	✓	$2$	$1$	\(0\)	\(0\)	\(0\)	\(0\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q+\beta q^{2}+q^{4}-\beta q^{5}-\beta q^{8}-3q^{10}+\cdots\)
1521.2.a.l	$1521$	$2$	1521.a	1.a	$1$	$2$	$2$	$12.145$	\(\Q(\sqrt{3}) \)	None	✓	$2$	$1$	\(0\)	\(0\)	\(0\)	\(0\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q+\beta q^{2}+q^{4}-2\beta q^{7}-\beta q^{8}+2\beta q^{11}+\cdots\)
1521.2.a.m	$1521$	$2$	1521.a	1.a	$1$	$2$	$2$	$12.145$	\(\Q(\sqrt{17}) \)	None	✓	$1$	$0$	\(1\)	\(0\)	\(-3\)	\(3\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q+\beta q^{2}+(2+\beta )q^{4}+(-2+\beta )q^{5}+(1+\cdots)q^{7}+\cdots\)
1521.2.a.n	$1521$	$2$	1521.a	1.a	$1$	$3$	$3$	$12.145$	\(\Q(\zeta_{14})^+\)	None	✓	$1$	$1$	\(-3\)	\(0\)	\(-6\)	\(2\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q+(-1+\beta _{1}+\beta _{2})q^{2}+(4-\beta _{1})q^{4}+\cdots\)
1521.2.a.o	$1521$	$2$	1521.a	1.a	$1$	$3$	$3$	$12.145$	\(\Q(\zeta_{14})^+\)	None	✓	$1$	$1$	\(-2\)	\(0\)	\(-4\)	\(3\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q+(-1-\beta _{2})q^{2}+(\beta _{1}+\beta _{2})q^{4}+(-2+\cdots)q^{5}+\cdots\)
1521.2.a.p	$1521$	$2$	1521.a	1.a	$1$	$3$	$3$	$12.145$	\(\Q(\zeta_{14})^+\)	None	✓	$1$	$0$	\(-1\)	\(0\)	\(-4\)	\(10\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q-\beta _{1}q^{2}+\beta _{2}q^{4}+(-2+\beta _{1}-\beta _{2})q^{5}+\cdots\)
1521.2.a.q	$1521$	$2$	1521.a	1.a	$1$	$3$	$3$	$12.145$	\(\Q(\zeta_{14})^+\)	None	✓	$1$	$1$	\(1\)	\(0\)	\(4\)	\(-10\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q+\beta _{1}q^{2}+\beta _{2}q^{4}+(2-\beta _{1}+\beta _{2})q^{5}+\cdots\)
1521.2.a.r	$1521$	$2$	1521.a	1.a	$1$	$3$	$3$	$12.145$	\(\Q(\zeta_{14})^+\)	None	✓	$1$	$0$	\(2\)	\(0\)	\(4\)	\(-3\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q+(1-\beta _{1})q^{2}+(1-2\beta _{1}+\beta _{2})q^{4}+(1+\cdots)q^{5}+\cdots\)
1521.2.a.s	$1521$	$2$	1521.a	1.a	$1$	$3$	$3$	$12.145$	\(\Q(\zeta_{14})^+\)	None	✓	$1$	$0$	\(3\)	\(0\)	\(6\)	\(-2\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q+(1-\beta _{1}-\beta _{2})q^{2}+(4-\beta _{1})q^{4}+(1+\cdots)q^{5}+\cdots\)
1521.2.a.t	$1521$	$2$	1521.a	1.a	$1$	$4$	$4$	$12.145$	4.4.8112.1	\(\Q(\sqrt{-39}) \)	✓	$4$	$0$	\(0\)	\(0\)	\(0\)	\(0\)		$+$	$-$	$-$	$2^{2}$	$N(\mathrm{U}(1))$	\(q-\beta _{2}q^{2}+(2-\beta _{3})q^{4}+\beta _{1}q^{5}+(\beta _{1}+\cdots)q^{8}+\cdots\)
1521.2.a.u	$1521$	$2$	1521.a	1.a	$1$	$4$	$4$	$12.145$	\(\Q(\sqrt{3}, \sqrt{5})\)	None	✓	$4$	$0$	\(0\)	\(0\)	\(0\)	\(0\)		$+$	$-$	$-$	$2^{2}$	$\mathrm{SU}(2)$	\(q+\beta _{3}q^{2}+3q^{4}+\beta _{3}q^{5}+2\beta _{1}q^{7}+\cdots\)
1521.2.a.v	$1521$	$2$	1521.a	1.a	$1$	$6$	$6$	$12.145$	6.6.1997632.1	None	✓	$2$	$1$	\(0\)	\(0\)	\(0\)	\(-12\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q+\beta _{5}q^{2}+(-2\beta _{2}+\beta _{4})q^{4}+(\beta _{1}+\beta _{3}+\cdots)q^{5}+\cdots\)
1521.2.a.w	$1521$	$2$	1521.a	1.a	$1$	$6$	$6$	$12.145$	6.6.1997632.1	None	✓	$2$	$0$	\(0\)	\(0\)	\(0\)	\(12\)		$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	\(q+\beta _{5}q^{2}+(-2\beta _{2}+\beta _{4})q^{4}+(\beta _{1}+\beta _{3}+\cdots)q^{5}+\cdots\)

Decomposition of \(S_{2}^{\mathrm{old}}(\Gamma_0(1521))\) into lower level spaces

\( S_{2}^{\mathrm{old}}(\Gamma_0(1521)) \cong \) \(S_{2}^{\mathrm{new}}(\Gamma_0(39))\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(117))\)\(^{\oplus 2}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(169))\)\(^{\oplus 3}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(507))\)\(^{\oplus 2}\)