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Local embeddings of lines in singular hypersurfaces

Guangfeng Jiang, Dirk Siersma (1999)

Annales de l'institut Fourier

Lines on hypersurfaces with isolated singularities are classified. New normal forms of simple singularities with respect to lines are obtained. Several invariants are introduced.

Local Peak Sets in Weakly Pseudoconvex Boundaries in n

Borhen Halouani (2009)

Annales de la faculté des sciences de Toulouse Mathématiques

We give a sufficient condition for a C ω (resp. C )-totally real, complex-tangential, ( n - 1 ) -dimensional submanifold in a weakly pseudoconvex boundary of class C ω (resp. C ) to be a local peak set for the class 𝒪 (resp. A ). Moreover, we give a consequence of it for Catlin’s multitype.

Local volumes of Cartier divisors over normal algebraic varieties

Mihai Fulger (2013)

Annales de l’institut Fourier

In this paper we study a notion of local volume for Cartier divisors on arbitrary blow-ups of normal complex algebraic varieties of dimension greater than one, with a distinguished point. We apply this to study an invariant for normal isolated singularities, generalizing a volume defined by J. Wahl for surfaces. We also compare this generalization to a different one arising in recent work of T. de Fernex, S. Boucksom, and C. Favre.

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