Uniform admissible-section conjecture for disconnected klt Calabi–Yau pairs

For a positive integer nn and a natural number dd, let A(X,D)A(X,D) denote the space of admissible sections associated with the divisor DD. Uniform admissible-section conjecture. If (X,B)(X,B) is a possibly disconnected klt pair of dimension at most dd and

n(KX+B)0,n(K_X+B)\sim 0,

then there exists a constant N(n,d)>0N(n,d)>0 such that A(X,N(KX+B))A(X,N(K_X+B)) contains a nonzero admissible section. The conjecture is proved in the paper when XX has dimension 11; it remains open in the stated generality.

Sources & referencesView supporting material

Primary source

Yanning Xu, “Complements on log canonical Fano varieties”, arXiv:1901.03891 (2019).

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