8 citations · 8 across the 3 of their papers we have counts for
3 papers
math.GR2008★ 8 cited
A Quasi Curtis-Tits-Phan theorem for the symplectic group
Rieuwert J. Blok Corneliu Hoffman
We obtain the symplectic group $\SP(V)$ as the universal completion of an amalgam of low rank subgroups akin to Levi components. We let $\SP(V)$ act flag-transitively on the geomet…
math.GR2006
A Quasi Curtis-Tits-Phan theorem for the symplectic group
Rieuwert J. Blok, Corneliu Hoffman
We obtain the symplectic group as an amalgam of low rank subgroups akin to Levi components. We do this by having the group act flag-transitively on a new type of geometry and apply…
math.CO2003
Topological properties of active orders for matroid bases
Rieuwert Blok, Bruce Sagan
Las Vergnas introduced several lattice structures on the bases of an ordered matroid M by using their external and internal activities. He also noted that when computing the Moebiu…