2009-10-01Zeitschriftenartikel DOI: 10.1515/ADVGEOM.2009.025
Convex subspace closure of the point shadow of an apartment of a spherical building
Let Σ be the point-line truncation of an augmented J-Grassmann geometry of a spherical building B. We show that if |J| = 1, or if |J| ≥ 2 and some additional conditions hold, then the convex subspace closure in Σ of the point shadow of an apartment of B is the entire space Σ.
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