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Kleinian groups - geometrically finite and geometrically perverse. (English) Zbl 0662.30043
Geometry of group representations. Proc. AMS-IMS-SIAM Jt. Summer Res. Conf., Boulder/Colo. 1987, Contemp. Math. 74, 1-50 (1988).
[For the entire collection see Zbl 0651.00007.]
L. Greenberg [Ann. Math., II. Ser. 84, 433-441 (1966; Zbl 0161.274)] proved that the finitely generated degenerate groups discovered by L. Bers in 1965 are actually geometrically infinite. In this article the author surveys some recent and interesting results concerning the nature of geometrically infinite, but finitely generated Kleinian groups.
Reviewer: A.D.Mednych

MSC:
30F40 Kleinian groups (aspects of compact Riemann surfaces and uniformization)
20H10 Fuchsian groups and their generalizations (group-theoretic aspects)