Generalizations of the restriction theorem for multiplier ideals

Details Generalizations of the restriction theorem for multiplier ideals Generalizations of the restriction theorem for multiplier ideals

2010-01-16

arxiv.org/abs/1001.2841v1

Mathematics

Algebraic Geometry

17 pages. Submitted

Scientific paper

We present an algebro-geometric perspective on some generalizations, due to S. Takagi, of the restriction theorem for multiplier ideals. The first version of the restriction theorem for multiplier ideals was discovered by Esnault and Viehweg. In a series of papers S. Takagi has discovered generalizations of the restriction theorem and some formulas for multiplier ideals that follow from the restriction theorem. He uses the technique of tight closure and reduction to positive characteristic. We are able to provide an algebro-geometric proof of generalizations of his restriction theorem and his subadditivity theorem. We also prove an adjunction formula for relative canonical divisors of factorizing resolutions of singularities.

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