Characterizations of trialities of type Iid in buildings of type DU+2084 Ghent University
A triality of type Iid in a building U+0394 of type D4 is a type rotating automorphism of order 3 whose structure of fixed flags is the building of type G2 related to DicksonU+2019s simple groups (in geometric term, this building is the split Cayley generalized hexagon over the field in question). Such a triality exists over any field and is unique up to conjugacy. In this paper, we present two characterizations of such trialities among all type ...