Effective adjunction conjecture for lc-trivial fibrations

At least 5 years old · documented by

Let (X,B)(X,B) be an lc pair such that KX+BK_X+B is a QQ-Cartier divisor, and let f:(X,B)→Zf:(X,B)\to Z be an lc-trivial fibration. Let D\mo{\mathbf D}_{\mo} denote its moduli b-divisor. Effective adjunction conjecture. There exists a positive integer mm, depending only on the dimension of XX and the horizontal multiplicities of BB, such that mD\mom{\mathbf D}_{\mo} is a base-point free b-divisor. This is a conjecture about effectivity in the canonical bundle formula; the paper studies a variant suitable for induction and real coefficients, while the general assertion is not stated as resolved here.

References

Primary source

Zhan Li, “A variant of the effective adjunction conjecture with applications”, arXiv:2007.04107 (2020).

Additional references

2 papers in this index state this conjecture (2020). The statement above is taken from the most recent of them; the others are arXiv:2002.06565.

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.