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Patchworking algebraic curves disproves the Ragsdale conjecture. (English) Zbl 0876.14017
This paper exposes in a clear way the combinatorial aspects of Oleg Viro’s technique of “patchworking” algebraic curves, and of one of its main applications: the disproval of the Ragsdale conjecture on the topology of real algebraic curves.
Reviewer: G.Bolondi (Povo)

MSC:
14H25 Arithmetic ground fields for curves
14H45 Special algebraic curves and curves of low genus
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