Characterizing Normal Crossing Hypersurfaces


The objective of this article is to give an effective algebraic characterization of normal crossing hypersurfaces in complex manifolds. It is shown that a divisor (=hypersurface) has normal crossings if and only if it a free divisor, has a radical Jacobian ideal and a smooth normalization. Using K. Saito’s theory of free divisors, also a characterization in terms of logarithmic differential forms and vector fields is found and and finally another one in terms of the logarithmic residue using recent results of M. Granger and M. Schulze.

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@inproceedings{FABER2012CharacterizingNC, title={Characterizing Normal Crossing Hypersurfaces}, author={ELEONORE FABER}, year={2012} }