For finitely field-definable coordinate geometries over ordered fields or fields with more than two elements, a relation is a concept if and only if it is field-definable and invariant under affine automorphisms, so concept inclusion mirrors automorphism group inclusion.
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Definable coordinate geometries over fields, part 1: theory
For finitely field-definable coordinate geometries over ordered fields or fields with more than two elements, a relation is a concept if and only if it is field-definable and invariant under affine automorphisms, so concept inclusion mirrors automorphism group inclusion.