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The coordinatization of affine planes by rings

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Abstract

With every unitary free module of rank 2 there is naturally associated a generalized affine plane (e.g. the lines are just the cosets of all nonzero 1-generated submodules). Here we solve the converse problem by coordinatizing a given generalized affine plane which satisfies certain versions of Desargues' postulate.

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Schmidt, S.E., Steinitz, R. The coordinatization of affine planes by rings. Geom Dedicata 62, 299–317 (1996). https://doi.org/10.1007/BF00181570

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