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On a generalization of nets. (English) Zbl 0692.51003
Nets are incidence structures with a partition of the line set into “parallel classes”. Suitable conditions concerning existence and uniqueness of intersection points allow to describe a net by a system of binary operations. In special cases these binary operations give groupoids or quasigroups (up to homotopy).
Reviewer: Th.Grundhöfer

MSC:
51A15 Linear incidence geometric structures with parallelism
51A25 Algebraization in linear incidence geometry
20N05 Loops, quasigroups
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References:
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