7 citations · 14 across the 11 of their papers we have counts for
4 papers · 1 filter
Confluence Graphs of Unitals
Theo Grundhöfer, Markus J. Stroppel, Hendrik Van Maldeghem
We show that the cliques of maximal size in the confluence graph of an arbitrary unital of order have size , and that these cliques are the pencils of all blocks through…
Semiaffine stable planes
Rainer Löwen, Markus Johannes Stroppel
A locally compact stable plane of positive topological dimension will be called semiaffine if for every line and every point not in there is at most one line passing th…
An isomorphism of unitals, and an isomorphism of classical groups
Markus Johannes Stroppel
An isomorphism between two hermitian unitals is proved, and used to treat isomorphisms of classical groups that are related to the isomorphism between certain simple real Lie algeb…
Subalgebras of Octonion Algebras
Norbert Knarr, Markus J. Stroppel
For an arbitrary octonion algebra, we determine all subalgebras. It turns out that every subalgebra of dimension less than four is associative, while every subalgebra of dimension…