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Dupin cyclidic systems geometrically revisited (2201.08576v1)
Published 21 Jan 2022 in math.DG
Abstract: The induced metrics of Dupin cyclidic systems, that is, orthogonal coordinate systems with Dupin cyclides and spheres as coordinate surfaces, were provided by Darboux. Here we take a more geometric point of view and discuss how Dupin cyclides and Lam\'e families of Dupin cyclidic systems can be obtained by suitably evolving an initial circle or a Dupin cyclide, respectively. This approach reveals that those Lam\'e families are given by parallel surfaces in various space forms.