Abstract
We show that a ruled surface M in E1 3 is of finite type if and only if M is minimal, or M is a part of a circular cylinder, or M is a part of a hyperbolic cylinder, or M is an isoparametric surface with null rules. We also give a complete classification of isoparametric ruled surfaces with null rules.
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Dedicated to Professor Katsumi Nomizu on the occasion of his seventieth birthday
Senior Research Assistant of the National Fund for Scientific Research (Belgium)
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Dillen, F., Verstraelen, L., Van de Woestyne, I. et al. Ruled surfaces of finite type in 3- dimensional minkowski space. Results. Math. 27, 250–255 (1995). https://doi.org/10.1007/BF03322830
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DOI: https://doi.org/10.1007/BF03322830