On projective Hjelmslev planes of level <i>n</i>
On projective Hjelmslev planes of level <i>n</i>
In this paper, we establish a new (but equivalent) definition of projective Hjelmslev planes of level n. This shows that the nth floor of a triangle building is a projective Hjelmslev plane of level n (a result already announced in [ 9 ], but left unproved). This will allow us …