Projective klt pairs with nef anti-canonical divisor

Frédéric Campana, Junyan Cao, Shin-ichi Matsumura

In this paper, we study a projective klt pair $(X,\Delta )$ with the nef anti-log canonical divisor $-(K_X+\Delta )$ and its maximally rationally connected fibration $\psi :X⇢Y$.…