Shokurov's effective moduli-part conjecture for Fano type fibrations
Let be a proper surjective morphism with connected fibers between normal varieties, with of relative Fano type. Let be a -divisor on such that
for some -divisor on . Write
where is the discriminant part and is the moduli part.
Shokurov's conjecture. If is -log terminal, then there exists and an effective moduli part such that is -log terminal.
This is a stronger refinement of the epsilon-delta conjecture, incorporating the discriminant and moduli parts supplied by subadjunction. Its resolution status is not specified in the supplied text.
References
Primary source
Valery Alexeev and Alexander Borisov, “On the Log Discrepancies in Toric Mori Contractions”, arXiv:1208.3271 (2013).
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