e/External (mathematics)

Information
has gloss	eng: The term external is useful for describing certain algebraic structures. The term comes from the concept of an external binary operation which is a binary operation that draws from some external set. To be more specific, a left external binary operation on S over R is a function f : R \times S \rightarrow S and a right external binary operation on S over R is a function f : S \times R \rightarrow S where S is the set the operation is defined on, and R is the external set (the set the operation is defined over).
lexicalization	eng: external
instance of	(noun) an operation that follows the rules of Boolean algebra; each operand and the result take one of two values binary arithmetic operation, boolean operation, binary operation