Properties

Label 236.2.a
Level $236$
Weight $2$
Character orbit 236.a
Rep. character $\chi_{236}(1,\cdot)$
Character field $\Q$
Dimension $5$
Newform subspaces $3$
Sturm bound $60$
Trace bound $3$

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Defining parameters

Level: \( N \) \(=\) \( 236 = 2^{2} \cdot 59 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 236.a (trivial)
Character field: \(\Q\)
Newform subspaces: \( 3 \)
Sturm bound: \(60\)
Trace bound: \(3\)
Distinguishing \(T_p\): \(3\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(\Gamma_0(236))\).

Total New Old
Modular forms 33 5 28
Cusp forms 28 5 23
Eisenstein series 5 0 5

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

\(2\)\(59\)FrickeDim
\(-\)\(+\)$-$\(4\)
\(-\)\(-\)$+$\(1\)
Plus space\(+\)\(1\)
Minus space\(-\)\(4\)

Trace form

\( 5 q - 2 q^{5} + 4 q^{7} + 5 q^{9} + O(q^{10}) \) \( 5 q - 2 q^{5} + 4 q^{7} + 5 q^{9} + 6 q^{11} + 11 q^{15} - q^{17} + 8 q^{19} - 9 q^{21} - 8 q^{23} - q^{25} - 3 q^{27} - 6 q^{29} - 6 q^{33} - 9 q^{35} + 2 q^{37} + 10 q^{39} - 10 q^{41} + 20 q^{43} - 35 q^{45} + 4 q^{47} + 9 q^{49} - 8 q^{51} - 14 q^{53} - 19 q^{57} - 3 q^{59} - 10 q^{61} + 16 q^{63} - 12 q^{67} - 4 q^{69} - 23 q^{71} + 8 q^{73} - 24 q^{75} + 2 q^{77} + 8 q^{79} + 29 q^{81} + 18 q^{83} - 24 q^{85} - 21 q^{87} - 14 q^{89} + 18 q^{91} + 22 q^{93} + 4 q^{95} + 2 q^{97} + 36 q^{99} + O(q^{100}) \)

Decomposition of \(S_{2}^{\mathrm{new}}(\Gamma_0(236))\) into newform subspaces

Label Char Prim Dim $A$ Field CM Traces A-L signs Sato-Tate $q$-expansion
$a_{2}$ $a_{3}$ $a_{5}$ $a_{7}$ 2 59
236.2.a.a 236.a 1.a $1$ $1.884$ \(\Q\) None \(0\) \(-1\) \(-1\) \(-3\) $-$ $-$ $\mathrm{SU}(2)$ \(q-q^{3}-q^{5}-3q^{7}-2q^{9}-2q^{11}+\cdots\)
236.2.a.b 236.a 1.a $1$ $1.884$ \(\Q\) None \(0\) \(1\) \(3\) \(-1\) $-$ $+$ $\mathrm{SU}(2)$ \(q+q^{3}+3q^{5}-q^{7}-2q^{9}+6q^{11}+\cdots\)
236.2.a.c 236.a 1.a $3$ $1.884$ 3.3.321.1 None \(0\) \(0\) \(-4\) \(8\) $-$ $+$ $\mathrm{SU}(2)$ \(q+(-\beta _{1}-\beta _{2})q^{3}+(-1-\beta _{1})q^{5}+(3+\cdots)q^{7}+\cdots\)

Decomposition of \(S_{2}^{\mathrm{old}}(\Gamma_0(236))\) into lower level spaces

\( S_{2}^{\mathrm{old}}(\Gamma_0(236)) \cong \) \(S_{2}^{\mathrm{new}}(\Gamma_0(59))\)\(^{\oplus 3}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(\Gamma_0(118))\)\(^{\oplus 2}\)