(computing) A method of finding a nearly optimal solution to an optimization problem that cannot be solved exactly within a reasonable time.

Alternative spelling of overapproximation

Alternative spelling of underapproximation

(physics) A law of physics used to describe the spectrum of thermal radiation.

plural of approximation algorithm

plural of over-approximation

plural of under-approximation

(mathematics) An accurate approximation for factorials.

Used to indicate that a statement, though not necessarily entirely accurate or without exceptions, is good enough for basic or preliminary purposes; more or less; basically.

(mathematics) The "best" approximation of a function by a rational function of given order. Under this technique, the approximant's power series agrees with the power series of the function it is approximating.