Fundamental system

A fundamental system called

• in astronomy an exact coordinate frame for star locations and other objects, see inertial space
• a catalog of stars for the realization of an inertial space, see Fundamental System (Astronomy)
• in general geodesy an international coordinate framework for surveying networks, see ITRF
• in astronomical geodesy for stations for connection to the astronomical fundamental system, see fundamental station
• In function theory, a system of n linearly independent solutions of a homogeneous linear differential equation of the nth order, see Fundamental System (Mathematics)
• In the topology, a basic system of neighborhoods that defines a uniform structure, see uniform space

This is a disambiguation page for differentiating between several terms identified with the same word.