Abstract.
In this paper, we prove a combinatorial property of twin apartments and opposition of chambers in twin buildings. We then characterize adjacency of chambers in twin buildings by meansof opposition of chambers. As an application, we study maps which satisfy certain conditions related to opposition of chambers, e.g., maps that preserve opposition. Applied to the special case of spherical buildings, all our main results as well as their corollaries are new.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received February 20, 1999
Rights and permissions
About this article
Cite this article
Abramenko, P., Van Maldeghem, H. On Opposition in Spherical Buildings and Twin Buildings. Annals of Combinatorics 4, 125–137 (2000). https://doi.org/10.1007/s000260050001
Issue Date:
DOI: https://doi.org/10.1007/s000260050001