Abstract
We investigate the geometry in a real Euclidean building of type of some simple configurations in the associated projective plane at infinity , seen as ideal configurations in , and relate it with the projective invariants (from the cross ratio on ). In particular we establish a geometric classification of generic triples of ideal chambers of and relate it with the triple ratio of triples of flags.
Citation
Anne Parreau. "On triples of ideal chambers in $A_2$-buildings." Innov. Incidence Geom. Algebr. Topol. Comb. 17 (2) 109 - 140, 2019. https://doi.org/10.2140/iig.2019.17.109
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