J[oslash]rgensen's inequality for classical Schottky groups of real type II

Abstract

In this paper we consider J[oslash]rgensen's inequality for classical Schottky groups of real types, that is, the third, sixth and eighth types. The infimum of J[oslash]rgensen's numbers for the groups of the third, sixth and eighth types are 4, 16 and 16, respectively.