Intersection Theorem: Projective Geometry, Incidence Structure, Theorem

Szemerédi's Theorem: Szemerédi Trotter Theorem, Mathematics, Combinatorial Geometry, Incidence (Geometry)

Arthur Cayley: Pure Mathematics, Projective Geometry, Cayley-Hamilton Theorem, Parallel Postulate, Cayley's Theorem

Apollonius' Theorem: Geometry, Theorem, Median (geometry), Triangle

de Bruijn Erd¿s Theorem (incidence geometry): Incidence Geometry, Nicolaas Govert Bruijn, Lower Bound