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Linear spaces embedded into projective spaces via Baer sublines

Creative Commons 'BY' version 4.0 license
Abstract

Every nontrivial linear space embedded in a Pappian projective space such that the blocks of the linear space are projectively equivalent Baer sublines with respect to a separable quadratic field extension is either a Baer subspace, or a Hermitian unital.

Mathematics Subject Classifications: 51A45, 51E10