Ramification around Landau varieties

  • Frédéric Pham
Part of the Universitext book series (UTX)


The fundamental group of a topological space. Simple pinching, description of the vanishing chains, characterization of the vanishing classes, localization, Picard’s formula, Lefschetz’ formula, ramification type, invariant classes, proof of the Picard-Lefschetz formula. Study of certain singular points of Landau varieties, application of the Picard-Lefschetz formula.


Singular Point Fundamental Group Homology Group Homotopy Class Intersection Index 


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Copyright information

© Springer-Verlag London Limited 2011

Authors and Affiliations

  • Frédéric Pham
    • 1
  1. 1.Laboratoire J.-A. DieudonnéUniversité de Nice Sophia AntipolisNice cedex 02France

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