Rational connectedness conjecture for klt pairs with strictly nef anti-log canonical divisor

Let (X,Δ)(X,\Delta) be a projective klt pair. A divisor is strictly nef if it has positive intersection with every complete curve. A projective variety is rationally connected if two general points can be joined by a rational curve.

Rational connectedness conjecture. If (KX+Δ)-(K_X+\Delta) is strictly nef, then XX is rationally connected.

This is a particular case proposed in the paper of the singular Campana–Peternell conjecture. It is motivated by rational connectedness results for smooth projective varieties, but the general klt-pair statement remains open.

Sources & referencesView supporting material

Primary source

Jie Liu, Wenhao Ou, Juanyong Wang, Xiaokui Yang and Guolei Zhong, “Algebraic fibre spaces with strictly nef relative anti-log canonical divisor”, arXiv:2111.05234 (2021).

Additional references

2 papers in this index state this conjecture (2019–2021). The statement above is taken from the most recent of them; the others are arXiv:1908.06894.

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