Prokhorov–Shokurov conjectures on the moduli part of the canonical bundle formula
Prokhorov–Shokurov conjectures on the moduli part of the canonical bundle formula
Let be an lc-trivial fibration, and let denote the moduli divisor in the canonical bundle formula. For a birational model , write for the corresponding birational transform of the moduli divisor.
Prokhorov–Shokurov conjectures. The following properties are conjectured:
- Log canonical adjunction: There exists a proper birational morphism such that is semiample.
- Particular case of effective log abundance: If is the generic fibre of , then
where depends only on and the multiplicities of the horizontal part of . 3. Effective adjunction: There exists a positive integer , depending only on the dimension of and the horizontal multiplicities of , such that is the pullback of a divisor that is base point free on some model .
These conjectures concern semiampleness and effective boundedness of the moduli part in the canonical bundle formula. The source presents them as conjectural properties; no resolution is supplied here.
Sources & referencesView supporting material
Primary source
Enrica Floris, “Bounds on the denominators in the canonical bundle formula”, arXiv:1105.4553 (2012).
Progress summary
Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.
Solutions 0
Sign in to submit a solution.
No solutions have been posted yet.