Shokurov's effective moduli-part conjecture for Fano type fibrations
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.
Sources & referencesView supporting material
Primary source
Valery Alexeev and Alexander Borisov, “On the Log Discrepancies in Toric Mori Contractions”, arXiv:1208.3271 (2013).
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