The vanishing criterion for non-pseudo-effectivity of the canonical divisor
The vanishing criterion for non-pseudo-effectivity of the canonical divisor
Let be a klt projective variety over . Suppose that
for and every semi-ample line bundle on . The vanishing criterion conjecture asserts that is not pseudo-effective.
If true, this would provide a cohomological criterion forcing a klt projective variety outside the pseudo-effective range for the canonical divisor, with consequences for the birational geometry used in the paper's rational-chain-connectedness results. The source says that the conjecture would allow the non-vanishing assumption in one of its main results to be dropped; no resolution is given.
Sources & referencesView supporting material
Primary source
Emre Alp Özavcı, Zsolt Patakfalvi, Kevin Tucker, Joe Waldron and Zheng Xu, “On rational chain connectedness of globally +-regular varieties”, arXiv:2602.16945 (2026).
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