Space of modular forms of level 1600, weight 2, and trivial character

• Label: 1600.2.a
• Level: $1600$
• Weight: $2$
• Character orbit: 1600.a
• Rep. character: $\chi_{1600}(1,\cdot)$
• Character field: $\Q$
• Dimension: $35$
• Newform subspaces: $30$
• Sturm bound: $480$
• Trace bound: $13$

Defining parameters

Level:	\( N \)	\(=\)	\( 1600 = 2^{6} \cdot 5^{2} \)
Weight:	\( k \)	\(=\)	\( 2 \)
Character orbit:	\([\chi]\)	\(=\)	1600.a (trivial)
Character field:			\(\Q\)
Newform subspaces:			\( 30 \)
Sturm bound:			\(480\)
Trace bound:			\(13\)
Distinguishing \(T_p\):			\(3\), \(7\), \(11\), \(13\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(\Gamma_0(1600))\).

	Total	New	Old
Modular forms	276	41	235
Cusp forms	205	35	170
Eisenstein series	71	6	65

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

\(2\)	\(5\)	Fricke	Dim
\(+\)	\(+\)	\(+\)	\(8\)
\(+\)	\(-\)	\(-\)	\(10\)
\(-\)	\(+\)	\(-\)	\(9\)
\(-\)	\(-\)	\(+\)	\(8\)
Plus space		\(+\)	\(16\)
Minus space		\(-\)	\(19\)

Trace form

\( 35 q + 31 q^{9} + O(q^{10}) \)

Decomposition of \(S_{2}^{\mathrm{new}}(\Gamma_0(1600))\) 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					A-L signs		Fricke sign	Coefficient ring index	Sato-Tate	$q$-expansion
																		$a_{2}$	$a_{3}$	$a_{5}$	$a_{7}$		2	5
1600.2.a.a	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				200.2.a.a	$1$	$1$	\(0\)	\(-3\)	\(0\)	\(-2\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q-3q^{3}-2q^{7}+6q^{9}-q^{11}+4q^{13}+\cdots\)
1600.2.a.b	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				200.2.a.a	$1$	$1$	\(0\)	\(-3\)	\(0\)	\(-2\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q-3q^{3}-2q^{7}+6q^{9}+q^{11}-4q^{13}+\cdots\)
1600.2.a.c	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				20.2.a.a	$1$	$1$	\(0\)	\(-2\)	\(0\)	\(-2\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q-2q^{3}-2q^{7}+q^{9}+2q^{13}+6q^{17}+\cdots\)
1600.2.a.d	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				40.2.c.a	$1$	$1$	\(0\)	\(-2\)	\(0\)	\(2\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q-2q^{3}+2q^{7}+q^{9}-4q^{11}+4q^{13}+\cdots\)
1600.2.a.e	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				160.2.a.a	$1$	$1$	\(0\)	\(-2\)	\(0\)	\(2\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q-2q^{3}+2q^{7}+q^{9}+4q^{11}-6q^{13}+\cdots\)
1600.2.a.f	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				40.2.c.a	$1$	$0$	\(0\)	\(-2\)	\(0\)	\(2\)		$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	\(q-2q^{3}+2q^{7}+q^{9}+4q^{11}-4q^{13}+\cdots\)
1600.2.a.g	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				800.2.a.b	$1$	$0$	\(0\)	\(-1\)	\(0\)	\(-2\)		$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	\(q-q^{3}-2q^{7}-2q^{9}-5q^{11}+5q^{17}+\cdots\)
1600.2.a.h	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				800.2.a.b	$1$	$1$	\(0\)	\(-1\)	\(0\)	\(-2\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q-q^{3}-2q^{7}-2q^{9}+5q^{11}-5q^{17}+\cdots\)
1600.2.a.i	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				50.2.a.a	$1$	$0$	\(0\)	\(-1\)	\(0\)	\(2\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q-q^{3}+2q^{7}-2q^{9}-3q^{11}-4q^{13}+\cdots\)
1600.2.a.j	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				50.2.a.a	$1$	$0$	\(0\)	\(-1\)	\(0\)	\(2\)		$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	\(q-q^{3}+2q^{7}-2q^{9}+3q^{11}+4q^{13}+\cdots\)
1600.2.a.k	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				40.2.a.a	$1$	$0$	\(0\)	\(0\)	\(0\)	\(-4\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q-4q^{7}-3q^{9}+4q^{11}-2q^{13}-2q^{17}+\cdots\)
1600.2.a.l	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	\(\Q(\sqrt{-1}) \)	✓				160.2.c.a	$2$	$1$	\(0\)	\(0\)	\(0\)	\(0\)		$-$	$-$	$+$	$1$	$N(\mathrm{U}(1))$	\(q-3q^{9}-4q^{13}+8q^{17}-10q^{29}+\cdots\)
1600.2.a.m	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	\(\Q(\sqrt{-1}) \)	✓				160.2.c.a	$2$	$1$	\(0\)	\(0\)	\(0\)	\(0\)		$-$	$-$	$+$	$1$	$N(\mathrm{U}(1))$	\(q-3q^{9}+4q^{13}-8q^{17}-10q^{29}+\cdots\)
1600.2.a.n	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	\(\Q(\sqrt{-1}) \)	✓				32.2.a.a	$2$	$0$	\(0\)	\(0\)	\(0\)	\(0\)		$-$	$+$	$-$	$1$	$N(\mathrm{U}(1))$	\(q-3q^{9}+6q^{13}-2q^{17}+10q^{29}+\cdots\)
1600.2.a.o	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				40.2.a.a	$1$	$1$	\(0\)	\(0\)	\(0\)	\(4\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q+4q^{7}-3q^{9}-4q^{11}-2q^{13}-2q^{17}+\cdots\)
1600.2.a.p	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				50.2.a.a	$1$	$1$	\(0\)	\(1\)	\(0\)	\(-2\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q+q^{3}-2q^{7}-2q^{9}-3q^{11}+4q^{13}+\cdots\)
1600.2.a.q	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				50.2.a.a	$1$	$1$	\(0\)	\(1\)	\(0\)	\(-2\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q+q^{3}-2q^{7}-2q^{9}+3q^{11}-4q^{13}+\cdots\)
1600.2.a.r	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				800.2.a.b	$1$	$1$	\(0\)	\(1\)	\(0\)	\(2\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q+q^{3}+2q^{7}-2q^{9}-5q^{11}-5q^{17}+\cdots\)
1600.2.a.s	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				800.2.a.b	$1$	$0$	\(0\)	\(1\)	\(0\)	\(2\)		$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	\(q+q^{3}+2q^{7}-2q^{9}+5q^{11}+5q^{17}+\cdots\)
1600.2.a.t	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				160.2.a.a	$1$	$1$	\(0\)	\(2\)	\(0\)	\(-2\)		$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	\(q+2q^{3}-2q^{7}+q^{9}-4q^{11}-6q^{13}+\cdots\)
1600.2.a.u	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				40.2.c.a	$1$	$1$	\(0\)	\(2\)	\(0\)	\(-2\)		$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	\(q+2q^{3}-2q^{7}+q^{9}-4q^{11}-4q^{13}+\cdots\)
1600.2.a.v	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				40.2.c.a	$1$	$0$	\(0\)	\(2\)	\(0\)	\(-2\)		$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	\(q+2q^{3}-2q^{7}+q^{9}+4q^{11}+4q^{13}+\cdots\)
1600.2.a.w	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				20.2.a.a	$1$	$0$	\(0\)	\(2\)	\(0\)	\(2\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q+2q^{3}+2q^{7}+q^{9}+2q^{13}+6q^{17}+\cdots\)
1600.2.a.x	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				200.2.a.a	$1$	$0$	\(0\)	\(3\)	\(0\)	\(2\)		$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	\(q+3q^{3}+2q^{7}+6q^{9}-q^{11}-4q^{13}+\cdots\)
1600.2.a.y	$1600$	$2$	1600.a	1.a	$1$	$1$	$1$	$12.776$	\(\Q\)	None	✓				200.2.a.a	$1$	$0$	\(0\)	\(3\)	\(0\)	\(2\)		$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	\(q+3q^{3}+2q^{7}+6q^{9}+q^{11}+4q^{13}+\cdots\)
1600.2.a.z	$1600$	$2$	1600.a	1.a	$1$	$2$	$2$	$12.776$	\(\Q(\sqrt{5}) \)	\(\Q(\sqrt{-5}) \)	✓				160.2.c.b	$2$	$0$	\(0\)	\(-2\)	\(0\)	\(6\)		$+$	$-$	$-$	$2$	$N(\mathrm{U}(1))$	\(q+(-1-\beta )q^{3}+(3-\beta )q^{7}+(3+2\beta )q^{9}+\cdots\)
1600.2.a.ba	$1600$	$2$	1600.a	1.a	$1$	$2$	$2$	$12.776$	\(\Q(\sqrt{5}) \)	None	✓		✓		800.2.a.k	$2$	$1$	\(0\)	\(0\)	\(0\)	\(0\)		$-$	$-$	$+$	$2$	$\mathrm{SU}(2)$	\(q-\beta q^{3}+2\beta q^{7}+2q^{9}-\beta q^{11}-4q^{13}+\cdots\)
1600.2.a.bb	$1600$	$2$	1600.a	1.a	$1$	$2$	$2$	$12.776$	\(\Q(\sqrt{5}) \)	None	✓				800.2.a.k	$2$	$0$	\(0\)	\(0\)	\(0\)	\(0\)		$-$	$+$	$-$	$2$	$\mathrm{SU}(2)$	\(q-\beta q^{3}+2\beta q^{7}+2q^{9}+\beta q^{11}+4q^{13}+\cdots\)
1600.2.a.bc	$1600$	$2$	1600.a	1.a	$1$	$2$	$2$	$12.776$	\(\Q(\sqrt{2}) \)	None	✓				160.2.a.c	$2$	$0$	\(0\)	\(0\)	\(0\)	\(0\)		$-$	$+$	$-$	$2$	$\mathrm{SU}(2)$	\(q+\beta q^{3}+\beta q^{7}+5q^{9}+2\beta q^{11}-2q^{13}+\cdots\)
1600.2.a.bd	$1600$	$2$	1600.a	1.a	$1$	$2$	$2$	$12.776$	\(\Q(\sqrt{5}) \)	\(\Q(\sqrt{-5}) \)	✓				160.2.c.b	$2$	$0$	\(0\)	\(2\)	\(0\)	\(-6\)		$+$	$-$	$-$	$2$	$N(\mathrm{U}(1))$	\(q+(1+\beta )q^{3}+(-3+\beta )q^{7}+(3+2\beta )q^{9}+\cdots\)

Decomposition of \(S_{2}^{\mathrm{old}}(\Gamma_0(1600))\) into lower level spaces

\( S_{2}^{\mathrm{old}}(\Gamma_0(1600)) \simeq \) \(S_{2}^{\mathrm{new}}(\Gamma_0(20))\)\(^{\oplus 10}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(32))\)\(^{\oplus 6}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(40))\)\(^{\oplus 8}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(50))\)\(^{\oplus 6}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(64))\)\(^{\oplus 3}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(80))\)\(^{\oplus 6}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(100))\)\(^{\oplus 5}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(160))\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(200))\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(320))\)\(^{\oplus 2}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(400))\)\(^{\oplus 3}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(800))\)\(^{\oplus 2}\)