Coordinate System: system, Mathematics, Tuple, number, Scalar (mathematics), Point (geometry), Dimension, Manifold, Real Complex Commutative ring

Scalar Mathematics: Mathematics, Scalar, Linear Algebra, Real Number, Vector Space, Multiplication, Field Complex Number

Orthocentric System: Set (Mathematics), Point (Geometry), Plane (Mathematics)

Canonical Ring: Mathematics, Algebraic Variety, Complex Manifold, Graded Commutative Ring

Real Line: Line (Geometry), Point Number, Space (Mathematics), Euclidean Space, Dimension