Theory of tangential idealizers and tangentially free ideals

Details Theory of tangential idealizers and tangentially free ideals Theory of tangential idealizers and tangentially free ideals

2009-08-06

arxiv.org/abs/0908.0911v3

Mathematics

Commutative Algebra

v3: Totally revised and slightly shortened version. Introduction and content improved. Examples detailed and references added.

Scientific paper

We generalize the theory of logarithmic derivations through a self-contained study of modules here dubbed tangential idealizers. We establish reflexiveness criteria for such modules, provided the ring is a factorial domain. As a main consequence, necessary e sufficient conditions for their freeness are derived and the class of tangentially free ideals is introduced, thus extending (algebraically) the theory of free divisors proposed by K. Saito around 30 years ago.

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