학술논문
Umbilic and Tangential Singularities on Configurations of Principal Curvature Lines
Document Type
article
Author
Source
Anais da Academia Brasileira de Ciências. March 2002 74(1)
Subject
Language
English
ISSN
0001-3765
Abstract
In this paper is studied the relationship between quadratic tangencies of principal lines with the boundary of a surface and the Darbouxian umbilics of a smooth boundaryless surface which approximates it through the process of thickening and smoothing defined here.