caa a22 4500 386372136 CHVBK 20180307112001.0 cr unu---uuuuu 161130e198909 xx s 000 0 eng 10.1017/S0017089500007837 doi S0017089500007837 pii (NATIONALLICENCE)cambridge-10.1017/S0017089500007837 On projective Hjelmslev planes of level n [Elektronische Daten] 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 to characterize Artmann-sequences by means of their inverse limits and to construct new ones. We also deduce a new existence theorem for level n projective Hjelmslev planes. All results hold in the finite as well as in the infinite case. Copyright © Glasgow Mathematical Journal Trust 1989 Hanssens G. Seminarie voor Meetkunde en Kombinatoriek, Rljksuniversiteit van Gent, Krijgslaan 281, B-9000 Gent, Belgium van Maldeghem H. Seminarie voor Meetkunde en Kombinatoriek, Rljksuniversiteit van Gent, Krijgslaan 281, B-9000 Gent, Belgium Glasgow Mathematical Journal Cambridge University Press 31/3(1989-09), 257-261 0017-0895 31:3<257 1989 31 GMJ https://doi.org/10.1017/S0017089500007837 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0017089500007837 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hanssens G. Seminarie voor Meetkunde en Kombinatoriek, Rljksuniversiteit van Gent, Krijgslaan 281, B-9000 Gent, Belgium NATIONALLICENCE 700 1- van Maldeghem H. Seminarie voor Meetkunde en Kombinatoriek, Rljksuniversiteit van Gent, Krijgslaan 281, B-9000 Gent, Belgium NATIONALLICENCE 773 0- Glasgow Mathematical Journal Cambridge University Press 31/3(1989-09), 257-261 0017-0895 31:3<257 1989 31 GMJ CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge