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Positivity of twisted relative pluricanonical bundles and their direct images

Our main goal in this article is to establish a quantitative version of the positivity properties of twisted relative pluricanonical bundles and their direct images. The notion of "singular Hermitian metric" on vector bundles (together with an appropriate definition of positivity of the associated curvature) plays a major role here, and its properties are studied via a version of Ohsawa-Takegoshi extension theorem. Part of this article is based on the joint work of the first named author with Bo Berndtsson, and it can be seen as an expanded and updated version of it.

preprint2014arXivOpen access
Mihai PăunShigeharu Takayama
math.AG
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Mihai PăunShigeharu Takayama

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