Properties

Label 43.2.a
Level 43
Weight 2
Character orbit a
Rep. character \(\chi_{43}(1,\cdot)\)
Character field \(\Q\)
Dimension 3
Newforms 2
Sturm bound 7
Trace bound 1

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Defining parameters

Level: \( N \) = \( 43 \)
Weight: \( k \) = \( 2 \)
Character orbit: \([\chi]\) = 43.a (trivial)
Character field: \(\Q\)
Newforms: \( 2 \)
Sturm bound: \(7\)
Trace bound: \(1\)
Distinguishing \(T_p\): \(2\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(\Gamma_0(43))\).

Total New Old
Modular forms 4 4 0
Cusp forms 3 3 0
Eisenstein series 1 1 0

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

\(43\)Dim.
\(+\)\(1\)
\(-\)\(2\)

Trace form

\( 3q - 2q^{2} - 2q^{3} + 2q^{4} - 4q^{7} - q^{9} + O(q^{10}) \) \( 3q - 2q^{2} - 2q^{3} + 2q^{4} - 4q^{7} - q^{9} + 4q^{10} + q^{11} - 4q^{12} - 3q^{13} + 4q^{14} + 12q^{15} - 12q^{16} + 7q^{17} - 2q^{18} - 6q^{19} - 8q^{20} - 4q^{21} + 2q^{22} + q^{23} + 8q^{24} + 13q^{25} + 18q^{26} + 4q^{27} - 6q^{29} - 24q^{30} - 7q^{31} + 8q^{32} - 14q^{33} + 14q^{34} - 12q^{35} + 2q^{36} - 4q^{38} + 2q^{39} + 8q^{40} + 3q^{41} + 8q^{42} + q^{43} + 6q^{44} - 8q^{45} - 14q^{46} + 16q^{47} + 8q^{48} - 9q^{49} - 38q^{50} - 2q^{51} - 10q^{52} + 17q^{53} + 8q^{54} - 24q^{55} - 8q^{56} + 12q^{57} + 24q^{58} - 16q^{59} + 16q^{60} + 10q^{61} + 2q^{62} + 4q^{63} + 8q^{64} + 16q^{65} + 16q^{66} - q^{67} - 6q^{68} + 18q^{69} + 16q^{70} - 10q^{71} - 22q^{73} - 24q^{74} - 6q^{75} - 4q^{76} + 12q^{77} - 24q^{78} - 4q^{79} - 21q^{81} - 18q^{82} + 33q^{83} + 24q^{85} + 2q^{86} - 16q^{88} - 16q^{89} + 12q^{90} + 4q^{91} - 2q^{92} + 2q^{93} - 8q^{94} + 8q^{95} - 16q^{96} + 5q^{97} - 2q^{98} + 5q^{99} + O(q^{100}) \)

Decomposition of \(S_{2}^{\mathrm{new}}(\Gamma_0(43))\) into irreducible Hecke orbits

Label Dim. \(A\) Field CM Traces A-L signs $q$-expansion
\(a_2\) \(a_3\) \(a_5\) \(a_7\) 43
43.2.a.a \(1\) \(0.343\) \(\Q\) None \(-2\) \(-2\) \(-4\) \(0\) \(+\) \(q-2q^{2}-2q^{3}+2q^{4}-4q^{5}+4q^{6}+\cdots\)
43.2.a.b \(2\) \(0.343\) \(\Q(\sqrt{2}) \) None \(0\) \(0\) \(4\) \(-4\) \(-\) \(q+\beta q^{2}-\beta q^{3}+(2-\beta )q^{5}-2q^{6}+(-2+\cdots)q^{7}+\cdots\)