(1) Institute of Mathematics, Gdańsk University, Wita Stwosza 57, 80-952 Gdańsk, Poland
Abstract:
In the paper we characterize subspaces and strong subspaces of a semiaffine partial linear space and consider definability of projective and semiaffine planes, affine lines and parallelity in terms of projective lines. We also give some construction of a wide class of semiaffine partial linear spaces.
