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math.GR2020
Topological and algebraic properties of universal groups for right-angled buildings
Jens Bossaert, Tom De Medts
We study universal groups for right-angled buildings. Inspired by Simon Smith's work on universal groups for trees, we explicitly allow local groups that are not necessarily finite…
math.GR2012
Moufang sets arising from polarities of Moufang planes over octonion division algebras
Elizabeth Callens, Tom De Medts
For every octonion division algebra O, there exists a projective plane which is parametrized by O; these planes are related to rank two forms of linear algebraic groups of absolute…