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Decomposition of \( S_{10}^{\mathrm{new}}(4) \) into irreducible Hecke orbits

magma: S := CuspForms(4,10);
magma: N := Newforms(S);
sage: N = Newforms(4,10,names="a")
Label Dimension Field $q$-expansion of eigenform
4.10.1.a 1 \(\Q\) \(q \) \(\mathstrut+\) \(228q^{3} \) \(\mathstrut-\) \(666q^{5} \) \(\mathstrut-\) \(6328q^{7} \) \(\mathstrut+\) \(32301q^{9} \) \(\mathstrut+O(q^{10}) \)

Decomposition of \( S_{10}^{\mathrm{old}}(4) \) into lower level spaces

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