“…By [11], [10], [3], and [15], for any Kähler metric as initial metric, the solution ω t of the Kähler-Ricci flow equation exists for all time t ∈ [0, ∞), and the scalar curvature of ω t is uniformly bounded. Thus we can prove (1.1) by using the technique developed in [6], where a Hitchin-Thorpe type inequality was proved for 4-manifolds which admit a long time solution to a normalized Ricci flow equation with bounded scalar curvature.…”