Adjoint ideals along closed subvarieties of higher codimension

Details Adjoint ideals along closed subvarieties of higher codimension Adjoint ideals along closed subvarieties of higher codimension

2007-11-15

arxiv.org/abs/0711.2342v2

Mathematics

Algebraic Geometry

17 pages; v.2: minor changes, to appear in Crelles Journal

Scientific paper

In this paper, we introduce a notion of adjoint ideal sheaves along closed subvarieties of higher codimension and study its local properties using characteristic $p$ methods. When $X$ is a normal Gorenstein closed subvariety of a smooth complex variety $A$, we formulate a restriction property of the adjoint ideal sheaf $\adj_X(A)$ of $A$ along $X$ involving the l.c.i. ideal sheaf $\mathcal{D}_X$ of $X$. The proof relies on a modification of generalized test ideals of Hara and Yoshida.

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