2 problems

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The transcendental-lattice conjecture for Nikulin orbifolds and fixed K3 surfaces
Let $X$ be a fourfold of $K3^{[2]}$ -type admitting a symplectic involution $\sigma$ , let $Y$ be the partial resolution of $X/\sigma$ , and let $S$ be the K3 surface contained in…
Conjectureopenk3-surfaces nikulin-orbifolds transcendental-latticesarXiv posted 2 days ago
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The integral transcendental-lattice isometry conjecture for Nikulin orbifolds
Integral transcendental-lattice isometry conjecture. This isometry should hold with integer coefficients:
Conjectureopenhyperkahler-fourfolds k3-surfaces nikulin-orbifoldsarXiv posted 2 days ago

The transcendental-lattice conjecture for Nikulin orbifolds and fixed K3 surfaces