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Decomposition of \( S_{6}^{\mathrm{new}}(20) \) into irreducible Hecke orbits

magma: S := CuspForms(20,6);
magma: N := Newforms(S);
sage: N = Newforms(20,6,names="a")
Label Dimension Field $q$-expansion of eigenform
20.6.1.a 1 \(\Q\) \(q \) \(\mathstrut+\) \(22q^{3} \) \(\mathstrut-\) \(25q^{5} \) \(\mathstrut+\) \(218q^{7} \) \(\mathstrut+\) \(241q^{9} \) \(\mathstrut+O(q^{10}) \)

Decomposition of \( S_{6}^{\mathrm{old}}(20) \) into lower level spaces

\( S_{6}^{\mathrm{old}}(20) \) \(\cong\) $ \href{ /ModularForm/GL2/Q/holomorphic/10/6/1/ }{ S^{ new }_{ 6 }(\Gamma_0(10)) }^{\oplus 2 }\oplus \href{ /ModularForm/GL2/Q/holomorphic/5/6/1/ }{ S^{ new }_{ 6 }(\Gamma_0(5)) }^{\oplus 3 }\oplus \href{ /ModularForm/GL2/Q/holomorphic/4/6/1/ }{ S^{ new }_{ 6 }(\Gamma_0(4)) }^{\oplus 2 } $