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The Ciliberto et al. Question on Effective Divisors of Positive Self-Intersection

Ciliberto, Knutsen, Lesieutre, Lozovanu, Miranda, Mustopa and Testa asked a question about effective divisors of positive self-intersection on smooth projective surfaces. The answer is negative, witnessed by a very non-movable effective divisor.

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geometry-topologyMay 20, 2026Significance 15/100Registry: unreviewed

The Ciliberto et al. Question on Effective Divisors of Positive Self-Intersection

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Ciliberto, Knutsen, Lesieutre, Lozovanu, Miranda, Mustopa and Testa asked a question about effective divisors of positive self-intersection on smooth projective surfaces. The answer is negative, witnessed by a very non-movable effective divisor.

Source authenticatedThe Ciliberto et al. Question on Effective Divisors of Positive Self-Intersection →
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Ciliberto, Knutsen, Lesieutre, Lozovanu, Miranda, Mustopa and Testa asked a question about effective divisors of positive self-intersection on smooth projective surfaces. The answer is negative, witnessed by a very non-movable effective divisor.

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