Abstract
The convexity lattices, introduced by Bennett and Birkhoff, generalize the lattices of convex sets. We present three forms of Parallel Axiom in such lattices and define Euclidean and two classes of non-Euclidean lattices via the number of parallel lines through a point. The paper deals with these three classes of lattices.
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Libkin, L.O. Parallel axiom in convexity lattices. Period Math Hung 24, 1–12 (1992). https://doi.org/10.1007/BF02651082
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DOI: https://doi.org/10.1007/BF02651082