Extensions to Regressive Isols.
Joseph Barback · MATHEMATICA SCANDINAVICA · 1969
that collectively he named as tame isols. The tame isols include many of the kind of isols that may be considered as being well-behaved relative to some recursive features. Our interest in the present paper is to give some equivalent ways that characterize two types of tame isols. In particular, we characterize the isols that are recursively torre,