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Über verallgemeinerte W-Kongruenzen im projektiven Raum P3, deren eine Fokalfläche entartet

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Abstract

In the real projective space ℙ3 a W-congruence has the characteristic property that its second osculating space has a dimension d(2)≤4 [4]. In this paper we extend the concept of W-congruences to the case of not hyperbolic congruences by using the preceding property and we find all W-congruences with a degenerated focal surface.

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  1. Mathematisches Institut der Universität, 54006, Thessaloniki, Griechenland

    Stylianos S. Stamatakis

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  1. Stylianos S. Stamatakis
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Stamatakis, S.S. Über verallgemeinerte W-Kongruenzen im projektiven Raum P3, deren eine Fokalfläche entartet. Manuscripta Math 84, 1–12 (1994). https://doi.org/10.1007/BF02567438

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  • DOI: https://doi.org/10.1007/BF02567438

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