Mo logo [home] [lexicon] [problems] [tests] [courses] [auxiliaries] [notes] [staff] german flag
Mathematik-Online problems:

Problem 86: Quadrics as Union of Lines

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Show that the one-sheeted hyperboloid $ H: x_1^2+x_2^2-x_3^2=1$ is generated by a rotation of a line about the $ x_3$ -axis, and give all quadrics in $ \mathbb{R}^3$ that can be represented as a union of lines.

(Authors: Kimmerle/Apprich/Höfert)

see also:

[Solutions]
  automatisch erstellt am 14. 12. 2007