Geodesic
Compactness in Topological Hjelmslev Planes
Canadian mathematical bulletin, Tome 27 (1984) no. 4, pp. 423-429

Voir la notice de l'article provenant de la source Cambridge University Press

In the theory of ordinary topological affine and projective planes it is known that (1) An affine plane is never compact (2) a locally compact ordered projective plane is compact and archimedean (3) a locally compact connected projective plane is compact and (4) a locally compact projective plane over a coordinate ring with bi-associative multiplication is compact. In this paper we re-examine these results within the theory of topological Hjelmslev Planes and observe that while (1) remains valid (2), (3) and (4) are false. At first glance these negative results seem to suggest we are working in too general a setting. However a closer examination reveals that the absence of compactness in our setting is a natural and expected feature which in no way precludes the possibility of obtaining significant results.
DOI : 10.4153/CMB-1984-065-2
Mots-clés : 51H10, 51G05, 51C05 
Lorimer, J. W. Compactness in Topological Hjelmslev Planes. Canadian mathematical bulletin, Tome 27 (1984) no. 4, pp. 423-429. doi: 10.4153/CMB-1984-065-2
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