Generalised abundance conjecture for klt pairs with nef adjoint divisors
Generalised abundance conjecture for klt pairs with nef adjoint divisors
Let be a projective klt pair over a field . Assume that is pseudo-effective, and let be a nef -Cartier -divisor on . A divisor is num-semiample if it is numerically equivalent to a semiample -Cartier -divisor.
Generalised abundance conjecture. If is nef, then is num-semiample.
This extends abundance and the semiampleness conjecture to adjoint divisors involving a nef summand. The supplied text gives no resolution of the general statement, so it remains open.
Sources & referencesView supporting material
Primary source
Fabio Bernasconi and Liam Stigant, “Semiampleness for Calabi–Yau surfaces in positive and mixed characteristic”, arXiv:2207.03002 (2022).
Progress summary
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