51Mxx Real and complex geometry

• 51M04 Elementary problems in Euclidean geometries
• 51M05 Euclidean geometries (general) and generalizations
• 51M09 Elementary problems in hyperbolic and elliptic geometries
• 51M10 Hyperbolic and elliptic geometries (general) and generalizations
• 51M15 Geometric constructions
• 51M16 Inequalities and extremum problems, {For convex problems, See 52A40}
• 51M20 Polyhedra and polytopes; regular figures, division of spaces, See also {51F15}
• 51M25 Length, area and volume, See also {26B15}
• 51M30 Line geometries and their generalizations, See also {53A25}
• 51M35 Synthetic treatment of fundamental manifolds in projective geometries (Grassmannians, Veronesians and their generalizations), See also {14M15}
• 51M99 None of the above but in this section