Conjecture on arithmetic hyperbolicity for divisors in a nef cone

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Let XX be a projective variety defined over a number field kk, of dimension nn. Let E1,…,ErE_1,\ldots,E_r be nef Cartier divisors on XX such that ∑j=1rEj\sum_{j=1}^rE_j is ample. Let D1,…,DqD_1,\ldots,D_q be non-zero effective, possibly reducible, Cartier divisors in general position, and let

D=∑i=1qDi.D=\sum_{i=1}^qD_i.

Suppose that

Di≡∑j=1rai,jEjD_i\equiv\sum_{j=1}^r a_{i,j}E_j

for non-negative real numbers ai,ja_{i,j}, and write Pi=(ai,1,…,ai,r)∈RrP_i=(a_{i,1},\ldots,a_{i,r})\in\mathbb{R}^r. Assume that for every proper subset TT of the standard basis vectors {e1,…,er}⊂Rr\{e_1,\ldots,e_r\}\subset\mathbb{R}^r, at most ∣T∣⌊q/r⌋|T|\left\lfloor q/r\right\rfloor of the vectors P1,…,PqP_1,\ldots,P_q are supported on TT. The nef-cone conjecture. If q≥r(n+1)+1q\geq r(n+1)+1, then X∖DX\setminus D is arithmetically quasi-hyperbolic; if q≥2nr+1q\geq 2nr+1, then X∖DX\setminus D is arithmetically hyperbolic.

References

Primary source

Gordon Heier and Aaron Levin, “On the degeneracy of integral points and entire curves in the complement of nef effective divisors”, arXiv:1907.00896 (2020).

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