49 | 51 | 51B

Linear incidence geometry

51A05General theory and projective geometries
51A10Homomorphism, automorphism and dualities
51A15Structures with parallelism
51A20Configuration theorems
[See also 12Kxx, 20N05]
51A30Desarguesian and Pappian geometries
51A35Non-Desarguesian affine and projective planes
51A40Translation planes and spreads
51A45Incidence structures imbeddable into projective geometries
51A50Polar geometry, symplectic spaces, orthogonal spaces
51A99None of the above, but in this section