Variation of singular K\'ahler-Einstein metrics: positive Kodaira dimension
- Resource Type
- Working Paper
- Authors
- Cao, Junyan; Guenancia, Henri; Păun, Mihai
- Source
- Subject
- Mathematics - Differential Geometry
Mathematics - Algebraic Geometry
Mathematics - Complex Variables
- Language
Given a K\"ahler fiber space $p:X\to Y$ whose generic fiber is of general type, we prove that the fiberwise singular K\"ahler-Einstein metric induces a semipositively curved metric on the relative canonical bundle $K_{X/Y}$ of $p$. We also propose a conjectural generalization of this result for relative twisted K\"ahler-Einstein metrics. Then we show that our conjecture holds true if the Lelong numbers of the twisting current are zero. Finally, we explain the relevance of our conjecture for the study of fiber-wise Song-Tian metrics (which represent the analogue of KE metrics for fiber spaces whose generic fiber has positive but not necessarily maximal Kodaira dimension).
Comment: v2: Title changed as the initial text is now split into two separate articles (authored by the same persons). The main results we obtain here are less general than their respective counterparts in the previous version, due to a gap in our arguments