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Published online by Cambridge University Press: 29 August 2025
We determine explicit generators for the ring of modular forms associated with the moduli spaces of K3 surfaces with automorphism group  $(\mathbb {Z}/2\mathbb {Z})^2$ and of Picard rank 13 and higher. The K3 surfaces in question carry a canonical Jacobian elliptic fibration and the modular form generators appear as coefficients in the Weierstrass-type equations describing these fibrations.
$(\mathbb {Z}/2\mathbb {Z})^2$ and of Picard rank 13 and higher. The K3 surfaces in question carry a canonical Jacobian elliptic fibration and the modular form generators appear as coefficients in the Weierstrass-type equations describing these fibrations.
 $x$
with
$x$
with 
 $\mathrm{Aut}(x)={\left(\mathrm{Z}/2\mathrm{Z}\right)}^2$
, preprint, 2024. available at arXiv:2305.08959. to appear in Indiana Univ. Math. J.Google Scholar
$\mathrm{Aut}(x)={\left(\mathrm{Z}/2\mathrm{Z}\right)}^2$
, preprint, 2024. available at arXiv:2305.08959. to appear in Indiana Univ. Math. J.Google Scholar ${P}^1$
 and automorphic forms, In Algebraic Geometry, Contemp. Math. 422, American Mathematical Society, Providence RI, 2007. 89–106. MR2296434Google Scholar
${P}^1$
 and automorphic forms, In Algebraic Geometry, Contemp. Math. 422, American Mathematical Society, Providence RI, 2007. 89–106. MR2296434Google Scholar