Abstract
In this paper, ν-principal cycles of surfaces immersed in ∝4 are studied. In terms of geometric invariants, an integral expression for the first derivative of the Poincaré mapping associated with a ν-principal cycle is obtained.
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Garcia, R.A., Sánchez-Bringas, F. Closed Principal Lines of Surfaces Immersed in the Euclidean 4-Space. Journal of Dynamical and Control Systems 8, 153–166 (2002). https://doi.org/10.1023/A:1015365309326
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DOI: https://doi.org/10.1023/A:1015365309326