(1) URA 753 Paris 7 CNRS/University of Le Mans, 32 Rue de la Réunion, 7502 Paris, France;(2) Department of Mathematics, Bowling Green State University, Bowling Green, OH, 43403, U.S.A.
Abstract:
The construction and characterization by T. Ohkuma of a chain whose automorphism group acts uniquely transitively is extended in this article to analogues for circularly ordered sets and betweenness chains.