Overgroups of the Automorphism Group of the Rado Graph
arXiv:1205.3717
Abstract
We are interested in overgroups of the automorphism group of the Rado graph. One class of such overgroups is completely understood; this is the class of reducts. In this article we tie recent work on various other natural overgroups, in particular establishing group connections between them and the reducts.
11 pages, 2 figures