👉 In physics and mathematics, a contractant is an object that possesses properties analogous to those of a wave. These properties are typically related to the motion of particles in space or time, and they can be described by certain mathematical functions. Contractants are often used in quantum mechanics to represent systems with a large number of degrees of freedom, as these systems have many possible states and therefore many contractors. In classical mechanics, contractants are used to model objects that move under the influence of external forces.