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$% A. Bodin, Irregular fibers of complex polynomials in two variables, Rev. Mat. Complut. 17 (2004), 67–81.%$

Irregular Fibers of Complex Polynomials in Two Variables

Arnaud BODIN
Laboratoire Paul Painlevé
UFR de Mathématiques Université Lille I
59655 Villeneuve d’Ascq Cédex — France
Arnaud.Bodin@math.uiv-lille1.fr

Received: July 8, 2002
Accepted: February 7, 2003
ABSTRACT

For a complex polynomial in two variables we study the morphism induced in homology by the embedding of an irregular fiber in a regular neighborhood of it. We give necessary and sufficient conditions for this morphism to be injective, surjective. Particularly this morphism is an isomorphism if and only if the corresponding irregular value is regular at infinity. We apply these results to the study of vanishing and invariant cycles.

Key words: irregulars fibers, tube, vanishing cycles, invariant cycles, resolution of singularities.
2000 Mathematics Subject Classification: 32S20, 32S45, 32S30.