Strong Fujita freeness conjecture

Let XX be a normal projective variety of dimension nn, let x0Xx_0\in X be a smooth point, and let LL be an ample Cartier divisor. Assume that there exist positive numbers σp\sigma_p for p=1,2,,np=1,2,\ldots,n such that, for every subvariety WW of dimension pp containing x0x_0,

LpWpσp,\sqrt[p]{L^p\cdot W}\geq \sigma_p,

and such that

σpnfor all p,σn>n.\sigma_p\geq n \quad\text{for all }p, \qquad \sigma_n>n.

Strong Fujita freeness conjecture. The linear system

KX+L|K_X+L|

is free at x0x_0.

The paper describes this as a strong version of Fujita's freeness conjecture, strengthening the conclusion by imposing local numerical positivity conditions on subvarieties through a smooth point. Its status is not specified in the supplied text.

Sources & referencesView supporting material

Primary source

Nobuyuki Kakimi, “Freeness of adjoint linear systems on threefolds with non Gorenstein Q-factorial terminal singularities or some quotient singularities”, arXiv:math/0101176 (2001).

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