Algebraic Geometry Seminar: Extremal divisors on moduli spaces of K3 surfaces, by Laure Flapan
March 17, 2025
3:00 PM - 3:50 PM
Laure Flapan (MSU): Extremal divisors on moduli spaces of K3 surfaces
We study the cone of pseudoeffective divisors on moduli spaces of K3 surfaces. We give numerical criteria for when (the irreducible components of) a Noether-Lefschetz divisor on these moduli spaces is an extremal ray of the pseudoeffective cone and use this to exhibit many new extremal divisors. We also discuss the question of whether the pseudoeffective cone is generated by Noether-Lefschetz divisors.
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Date posted
Mar 12, 2025
Date updated
Mar 12, 2025
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