Schwachdiskrete Bewegungsgruppen einer pseudoeuklidischen Ebene

There are considered discontinuous motion groups — in a very weak sense — of a pseudoeuclidean plane. A motion groupG is to be said (8)-discrete, if there can be found a nontrivial orbit G(P) and a Minkovskian circle diskU which contains only a finite number of elements of G(P). Such groups will be divided after their subgroup of translations, necessary and sufficient conditions for the translations will be given as same as — to a certain extent — a classification of (8)-discrete groups.

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Herrn Professor Benno Klotzek zum 60. Geburtstag gewidmet