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Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.
We prove that if (X, A) is a threefold pair with mild singularities such that -(KX + A) is nef, then the numerical class of -(KX + A) is effective.
Daniel Kressner, Axel Elie Joseph Séguin, Gianluca Ceruti
Aurelio Muttoni, Enrique Corres Sojo