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arXiv · 1812.06530

Characterization of second type plane foliations using Newton polygons

Percy Fernández-Sanchez·Evelia R. García Barroso·Nancy Saravia-Molina
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Abstract

In this article we characterize the foliations that have the same Newton polygon that their union of formal separatrices, they are the foliations called of the second type. In the case of cuspidal foliations studied by Loray, we precise this characterization using the Poincar\'e-Hopf index. This index also characterizes the cuspidal foliations having the same desingularization that the union of its separatrices. Finally we give necessary and sufficient conditions when these cuspidal foliations are generalized curves, and a characterization when they have only one separatrix.

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Percy Fernández-Sanchez, Evelia R. García Barroso, Nancy Saravia-Molina. 2018-12-16. Characterization of second type plane foliations using Newton polygons. https://doi.org/10.2478/auom-2022-0021

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