Surface

A surface is an entity of nill depth.

One common type of surface is the boundary of an entity, which is sometimes called the surface of the entity.

Plane

A plane is a flat surface.

Planes are one of the central concepts of classical geometry.

Unlike standard mathematics, the concept of a plane in Objective Mathematics refers to real things, and real things have finite thicknesses and are never completely flat.

See also

• Point
• Curve
• Entity