Binary differential equations at parabolic and umbilical points for 2-parameter families of surfaces

J. L. Deolindo-Silva, Y. Kabata, T. Ohmoto

Research output: Contribution to journalArticle

Abstract

We determine local topological types of binary differential equations of asymptotic curves at parabolic and flat umbilical points for generic 2-parameter families of surfaces in P3 by comparing our projective classification of Monge forms and classification of general BDE obtained by Tari and Oliver. In particular, generic bifurcations of the parabolic curve are classified. The flecnodal curve is also examined by direct computations, and we present new bifurcation diagrams in typical examples.

Original languageEnglish
Pages (from-to)457-473
Number of pages17
JournalTopology and its Applications
Volume234
DOIs
Publication statusPublished - Feb 1 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geometry and Topology

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