Changes

An '''operator''' is a map from function space to function space.  If the range of an operator is on the [[real line]] or in the [[complex plane]], the operator is usually called a [[function]]al instead. The most commonly used operators in mathematics are [[binary operator]]s.

An '''operator''' is a [[mapping]] from [[function space]] to function space.  If the [[range]] of the operator is on the [[real line]] or in the [[complex plane]], the operator is usually called a [[function]]al instead. The most commonly used operators in mathematics are [[binary operator]]s.

An '''operator''' is also a person who makes phone connections, though this practice is becoming less common as the process becomes more automated.

An '''operator''' is also a person who makes phone connections, though this practice is becoming less common as the process becomes more automated.