Kawamata's conjecture on global generation of direct images of canonical bundles

Let f:YXf:Y\rightarrow X be a surjective morphism from a smooth projective variety to a smooth projective variety of dimension nn, such that ff is smooth over

X0=XB,X_0=X\setminus B,

where BB is a normal crossing divisor on XX. Let LL be an ample divisor on XX.

Kawamata's conjecture. The locally free sheaf

RjfωYLmR^jf_\ast\omega_Y\otimes L^{\otimes m}

is generated by global sections if mn+1m\geq n+1, or if m=nm=n and the intersection number

(Ln)2,(L^n)\geq 2,

for all j0j\geq 0.

This is proposed as a relative Fujita-type statement for higher direct images of canonical bundles. The supplied text does not give a resolution of the conjecture.

Sources & referencesView supporting material

Primary source

Junchao Shentu and Yongming Zhang, “On the Simultaneously Generation of Jets of the Adjoint Bundles”, arXiv:1709.06373 (2017).

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.