Vol. 79, No. 1, 1978

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On the intersection of regressive sets

Joseph Barback and Thomas Graham McLaughlin

Vol. 79 (1978), No. 1, 19–35
Abstract

Let A and B be regressive isols and let α A and β B. Let Y be the isol containing the set αβ. We study some basic features of the isol Y , and features of Y in the special case the sum A + B is regressive. We also show that there is a large variety of regressive isols A and B for which the values of Y that are associated, in the above way, are all finite.

Mathematical Subject Classification 2000
Primary: 03D50
Milestones
Received: 23 June 1977
Published: 1 November 1978
Authors
Joseph Barback
Thomas Graham McLaughlin