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Finite-Time Singularities of the Kähler--Ricci Flow on Fano Bundles II

Wangjian Jian, Jian Song

math.DGarXiv:2609.20513

Abstract

The analytic minimal model program proposed in SongTianSingularities, JST seeks to describe the birational transitions and fibre collapsing of the Kähler--Ricci flow through the geometry of its singularities. A fundamental conjecture of JST predicts Type I bounds for the scalar curvature and diameter of every fibre contratced by the limiting cohomological class at the finite singular time. This paper is a continuation of Splitting that establishes the Type I conjecture for collapsing solutions on Fano bundles with arbitrary smooth Fano fibres. If the fibre admits a smooth Kähler-Einstein metric, the Type I bound holds for the full curvature tensor.

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