LMFDB - Space of modular forms of level 1805, weight 4, and trivial character

Defining parameters

Level:	$ N $	$=$	$ 1805 = 5 \cdot 19^{2} $
Weight:	$ k $	$=$	$ 4 $
Character orbit:	$[\chi]$	$=$	1805.a (trivial)
Character field:			$\Q$
Newform subspaces:			$ 28 $
Sturm bound:			$760$
Trace bound:			$8$
Distinguishing $T_p$:			$2$, $3$

Dimensions

The following table gives the dimensions of various subspaces of $M_{4}(\Gamma_0(1805))$.

	Total	New	Old
Modular forms	590	341	249
Cusp forms	550	341	209
Eisenstein series	40	0	40

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

$5$	$19$	Fricke	Dim
$+$	$+$	$+$	$90$
$+$	$-$	$-$	$81$
$-$	$+$	$-$	$80$
$-$	$-$	$+$	$90$
Plus space		$+$	$180$
Minus space		$-$	$161$

Trace form

$ 341 q - 2 q^{3} + 1380 q^{4} - 5 q^{5} - 60 q^{6} - 34 q^{7} + 48 q^{8} + 3097 q^{9} + O(q^{10}) $

\( 341 q - 2 q^{3} + 1380 q^{4} - 5 q^{5} - 60 q^{6} - 34 q^{7} + 48 q^{8} + 3097 q^{9} - 20 q^{10} - 40 q^{11} - 80 q^{12} + 22 q^{13} + 48 q^{14} + 50 q^{15} + 5340 q^{16} - 130 q^{17} + 16 q^{18} - 40 q^{20} - 252 q^{21} - 80 q^{22} + 66 q^{23} - 436 q^{24} + 8525 q^{25} + 852 q^{26} - 188 q^{27} + 76 q^{28} - 170 q^{29} + 120 q^{30} - 236 q^{31} + 1464 q^{32} + 432 q^{33} + 696 q^{34} - 290 q^{35} + 14240 q^{36} - 378 q^{37} + 612 q^{39} + 1062 q^{41} + 3156 q^{42} - 690 q^{43} + 240 q^{44} + 275 q^{45} + 200 q^{46} - 1378 q^{47} + 1068 q^{48} + 16093 q^{49} - 268 q^{51} - 132 q^{52} + 2430 q^{53} - 852 q^{54} - 160 q^{55} + 104 q^{56} + 1364 q^{58} + 428 q^{59} - 260 q^{60} + 810 q^{61} + 164 q^{62} - 1698 q^{63} + 22880 q^{64} + 290 q^{65} - 2496 q^{66} - 1670 q^{67} - 1256 q^{68} - 1076 q^{69} + 1480 q^{70} + 668 q^{71} + 908 q^{72} - 90 q^{73} + 1108 q^{74} - 50 q^{75} - 960 q^{77} + 2488 q^{78} - 56 q^{79} - 1120 q^{80} + 26569 q^{81} - 3788 q^{82} - 202 q^{83} - 1408 q^{84} - 370 q^{85} - 1680 q^{86} - 1588 q^{87} - 3196 q^{88} - 3150 q^{89} + 460 q^{90} - 1724 q^{91} - 4328 q^{92} - 4400 q^{93} + 1120 q^{94} + 2396 q^{96} - 2898 q^{97} - 848 q^{98} + 1400 q^{99} + O(q^{100}) \)

Display 100 coefficients 10 coefficients

Decomposition of $S_{4}^{\mathrm{new}}(\Gamma_0(1805))$ 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
Label	Level	Weight	Char	Prim	Char order	Dim	Rel. Dim	$A$	Field	CM	Self-dual	Inner twists	Rank*	$a_{2}$	$a_{3}$	$a_{5}$	$a_{7}$	5	19	Fricke sign	Coefficient ring index	Sato-Tate	$q$-expansion
1805.4.a.a	$1805$	$4$	1805.a	1.a	$1$	$1$	$1$	$106.498$	$\Q$	None	✓	$1$	$0$	$-5$	$-4$	$5$	$-32$	$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	$q-5q^{2}-4q^{3}+17q^{4}+5q^{5}+20q^{6}+\cdots$
1805.4.a.b	$1805$	$4$	1805.a	1.a	$1$	$1$	$1$	$106.498$	$\Q$	None	✓	$1$	$1$	$-5$	$5$	$5$	$-19$	$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	$q-5q^{2}+5q^{3}+17q^{4}+5q^{5}-5^{2}q^{6}+\cdots$
1805.4.a.c	$1805$	$4$	1805.a	1.a	$1$	$1$	$1$	$106.498$	$\Q$	None	✓	$1$	$2$	$-3$	$-7$	$5$	$11$	$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	$q-3q^{2}-7q^{3}+q^{4}+5q^{5}+21q^{6}+\cdots$
1805.4.a.d	$1805$	$4$	1805.a	1.a	$1$	$1$	$1$	$106.498$	$\Q$	None	✓	$1$	$1$	$-3$	$5$	$-5$	$-1$	$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	$q-3q^{2}+5q^{3}+q^{4}-5q^{5}-15q^{6}+\cdots$
1805.4.a.e	$1805$	$4$	1805.a	1.a	$1$	$1$	$1$	$106.498$	$\Q$	None	✓	$1$	$1$	$-1$	$-5$	$5$	$22$	$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	$q-q^{2}-5q^{3}-7q^{4}+5q^{5}+5q^{6}+\cdots$
1805.4.a.f	$1805$	$4$	1805.a	1.a	$1$	$1$	$1$	$106.498$	$\Q$	None	✓	$1$	$1$	$0$	$-4$	$-5$	$-22$	$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	$q-4q^{3}-8q^{4}-5q^{5}-22q^{7}-11q^{9}+\cdots$
1805.4.a.g	$1805$	$4$	1805.a	1.a	$1$	$1$	$1$	$106.498$	$\Q$	None	✓	$1$	$0$	$1$	$5$	$5$	$22$	$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	$q+q^{2}+5q^{3}-7q^{4}+5q^{5}+5q^{6}+\cdots$
1805.4.a.h	$1805$	$4$	1805.a	1.a	$1$	$1$	$1$	$106.498$	$\Q$	None	✓	$1$	$1$	$4$	$-2$	$-5$	$6$	$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	$q+4q^{2}-2q^{3}+8q^{4}-5q^{5}-8q^{6}+\cdots$
1805.4.a.i	$1805$	$4$	1805.a	1.a	$1$	$1$	$1$	$106.498$	$\Q$	None	✓	$1$	$1$	$5$	$-5$	$5$	$-19$	$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	$q+5q^{2}-5q^{3}+17q^{4}+5q^{5}-5^{2}q^{6}+\cdots$
1805.4.a.j	$1805$	$4$	1805.a	1.a	$1$	$3$	$3$	$106.498$	3.3.1304.1	None	✓	$1$	$0$	$3$	$11$	$15$	$-5$	$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	$q+(1+\beta _{1})q^{2}+(4+\beta _{1}+\beta _{2})q^{3}+(1+\cdots)q^{4}+\cdots$
1805.4.a.k	$1805$	$4$	1805.a	1.a	$1$	$5$	$5$	$106.498$	$\mathbb{Q}[x]/(x^{5} - \cdots)$	None	✓	$1$	$0$	$3$	$4$	$25$	$72$	$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	$q+(1-\beta _{1})q^{2}+(\beta _{1}+\beta _{3})q^{3}+(4-\beta _{1}+\cdots)q^{4}+\cdots$
1805.4.a.l	$1805$	$4$	1805.a	1.a	$1$	$6$	$6$	$106.498$	$\mathbb{Q}[x]/(x^{6} - \cdots)$	None	✓	$2$	$1$	$0$	$0$	$30$	$-8$	$-$	$+$	$-$	$2$	$\mathrm{SU}(2)$	$q+\beta _{1}q^{2}+(\beta _{1}-\beta _{5})q^{3}+(-1+\beta _{3}+\cdots)q^{4}+\cdots$
1805.4.a.m	$1805$	$4$	1805.a	1.a	$1$	$6$	$6$	$106.498$	$\mathbb{Q}[x]/(x^{6} - \cdots)$	None	✓	$1$	$1$	$1$	$-5$	$-30$	$5$	$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	$q+\beta _{1}q^{2}+(-1+\beta _{1}+\beta _{5})q^{3}+(4+\beta _{2}+\cdots)q^{4}+\cdots$
1805.4.a.n	$1805$	$4$	1805.a	1.a	$1$	$9$	$9$	$106.498$	$\mathbb{Q}[x]/(x^{9} - \cdots)$	None	✓	$1$	$1$	$-6$	$-2$	$45$	$-45$	$-$	$+$	$-$	$1$	$\mathrm{SU}(2)$	$q+(-1+\beta _{1})q^{2}-\beta _{5}q^{3}+(6-\beta _{1}+\beta _{2}+\cdots)q^{4}+\cdots$
1805.4.a.o	$1805$	$4$	1805.a	1.a	$1$	$9$	$9$	$106.498$	$\mathbb{Q}[x]/(x^{9} - \cdots)$	None	✓	$1$	$0$	$6$	$2$	$45$	$-45$	$-$	$-$	$+$	$1$	$\mathrm{SU}(2)$	$q+(1-\beta _{1})q^{2}+\beta _{5}q^{3}+(6-\beta _{1}+\beta _{2}+\cdots)q^{4}+\cdots$
1805.4.a.p	$1805$	$4$	1805.a	1.a	$1$	$10$	$10$	$106.498$	$\mathbb{Q}[x]/(x^{10} - \cdots)$	None	✓	$1$	$1$	$-3$	$-5$	$-50$	$3$	$+$	$-$	$-$	$1$	$\mathrm{SU}(2)$	$q-\beta _{1}q^{2}-\beta _{4}q^{3}+(4+\beta _{2})q^{4}-5q^{5}+\cdots$
1805.4.a.q	$1805$	$4$	1805.a	1.a	$1$	$10$	$10$	$106.498$	$\mathbb{Q}[x]/(x^{10} - \cdots)$	None	✓	$2$	$0$	$0$	$0$	$-50$	$18$	$+$	$+$	$+$	$2^{14}$	$\mathrm{SU}(2)$	$q+\beta _{1}q^{2}-\beta _{4}q^{3}+(6+\beta _{2})q^{4}-5q^{5}+\cdots$
1805.4.a.r	$1805$	$4$	1805.a	1.a	$1$	$10$	$10$	$106.498$	$\mathbb{Q}[x]/(x^{10} - \cdots)$	None	✓	$1$	$0$	$3$	$5$	$-50$	$3$	$+$	$+$	$+$	$1$	$\mathrm{SU}(2)$	$q+\beta _{1}q^{2}+\beta _{4}q^{3}+(4+\beta _{2})q^{4}-5q^{5}+\cdots$
1805.4.a.s	$1805$	$4$	1805.a	1.a	$1$	$16$	$16$	$106.498$	$\mathbb{Q}[x]/(x^{16} - \cdots)$	None	✓	$1$	$1$	$-1$	$-2$	$-80$	$-26$	$+$	$-$	$-$	$2^{2}$	$\mathrm{SU}(2)$	$q-\beta _{1}q^{2}+\beta _{9}q^{3}+(4+\beta _{2}+\beta _{3})q^{4}+\cdots$
1805.4.a.t	$1805$	$4$	1805.a	1.a	$1$	$16$	$16$	$106.498$	$\mathbb{Q}[x]/(x^{16} - \cdots)$	None	✓	$1$	$1$	$1$	$2$	$-80$	$-26$	$+$	$-$	$-$	$2^{2}$	$\mathrm{SU}(2)$	$q+\beta _{1}q^{2}-\beta _{9}q^{3}+(4+\beta _{2}+\beta _{3})q^{4}+\cdots$
1805.4.a.u	$1805$	$4$	1805.a	1.a	$1$	$20$	$20$	$106.498$	$\mathbb{Q}[x]/(x^{20} - \cdots)$	None	✓	$1$	$0$	$-1$	$2$	$100$	$82$	$-$	$-$	$+$	$2^{4}$	$\mathrm{SU}(2)$	$q-\beta _{1}q^{2}-\beta _{9}q^{3}+(5+\beta _{2})q^{4}+5q^{5}+\cdots$
1805.4.a.v	$1805$	$4$	1805.a	1.a	$1$	$20$	$20$	$106.498$	$\mathbb{Q}[x]/(x^{20} - \cdots)$	None	✓	$1$	$0$	$1$	$-2$	$100$	$82$	$-$	$-$	$+$	$2^{4}$	$\mathrm{SU}(2)$	$q+\beta _{1}q^{2}+\beta _{9}q^{3}+(5+\beta _{2})q^{4}+5q^{5}+\cdots$
1805.4.a.w	$1805$	$4$	1805.a	1.a	$1$	$30$	$30$	$106.498$		None	✓	$1$	$1$	$-12$	$-36$	$150$	$0$	$-$	$+$	$-$		$\mathrm{SU}(2)$
1805.4.a.x	$1805$	$4$	1805.a	1.a	$1$	$30$	$30$	$106.498$		None	✓	$1$	$0$	$0$	$0$	$-150$	$0$	$+$	$+$	$+$		$\mathrm{SU}(2)$
1805.4.a.y	$1805$	$4$	1805.a	1.a	$1$	$30$	$30$	$106.498$		None	✓	$1$	$1$	$0$	$0$	$-150$	$0$	$+$	$-$	$-$		$\mathrm{SU}(2)$
1805.4.a.z	$1805$	$4$	1805.a	1.a	$1$	$30$	$30$	$106.498$		None	✓	$1$	$0$	$12$	$36$	$150$	$0$	$-$	$-$	$+$		$\mathrm{SU}(2)$
1805.4.a.ba	$1805$	$4$	1805.a	1.a	$1$	$32$	$32$	$106.498$		None	✓	$2$	$1$	$0$	$0$	$160$	$-164$	$-$	$+$	$-$		$\mathrm{SU}(2)$
1805.4.a.bb	$1805$	$4$	1805.a	1.a	$1$	$40$	$40$	$106.498$		None	✓	$2$	$0$	$0$	$0$	$-200$	$52$	$+$	$+$	$+$		$\mathrm{SU}(2)$

Decomposition of $S_{4}^{\mathrm{old}}(\Gamma_0(1805))$ into lower level spaces

$ S_{4}^{\mathrm{old}}(\Gamma_0(1805)) \cong $ $S_{4}^{\mathrm{new}}(\Gamma_0(5))$$^{\oplus 3}$$\oplus$$S_{4}^{\mathrm{new}}(\Gamma_0(19))$$^{\oplus 4}$$\oplus$$S_{4}^{\mathrm{new}}(\Gamma_0(95))$$^{\oplus 2}$$\oplus$$S_{4}^{\mathrm{new}}(\Gamma_0(361))$$^{\oplus 2}$

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Level:	\( N \)	\(=\)	\( 1805 = 5 \cdot 19^{2} \)
Weight:	\( k \)	\(=\)	\( 4 \)
Character orbit:	\([\chi]\)	\(=\)	1805.a (trivial)
Character field:			\(\Q\)
Newform subspaces:			\( 28 \)
Sturm bound:			\(760\)
Trace bound:			\(8\)
Distinguishing \(T_p\):			\(2\), \(3\)

\(5\)	\(19\)	Fricke	Dim
\(+\)	\(+\)	$+$	\(90\)
\(+\)	\(-\)	$-$	\(81\)
\(-\)	\(+\)	$-$	\(80\)
\(-\)	\(-\)	$+$	\(90\)
Plus space		\(+\)	\(180\)
Minus space		\(-\)	\(161\)

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Defining parameters

Dimensions

Trace form

Decomposition of \(S_{4}^{\mathrm{new}}(\Gamma_0(1805))\) into newform subspaces

Decomposition of \(S_{4}^{\mathrm{old}}(\Gamma_0(1805))\) into lower level spaces

This project is supported by grants from the US National Science Foundation, the UK Engineering and Physical Sciences Research Council, and the Simons Foundation.

Label	1805.4.a

Level	$1805$
Weight	$4$
Character orbit	1805.a
Rep. character	$\chi_{1805}(1,\cdot)$
Character field	$\Q$
Dimension	$341$
Newform subspaces	$28$
Sturm bound	$760$
Trace bound	$8$