Normal congruences with focal bicylindrical surfaces

• Date: 1993
• Main Authors: Koneva, N. P., Конева, Н. П.
• Format: Article
• Language: Russian; English
• Published: Institute of Mathematics, NAS of Ukraine 1993
• Online Access: https://umj.imath.kiev.ua/index.php/umj/article/view/5859
• Journal Title: Ukrains’kyi Matematychnyi Zhurnal

A system of equations determining normal con~uences with focal surfaces (bicylinders) is found in a biaxial space of hyperbolic type by using a moving frame of the space and the method of Cartan exterior forms. The geometric construction of these congruences is presented.