ABSTRACT
Selection is one of the main operators used in evolutionary algorithms. The primary objective of the selection operator is to emphasize better solutions in a population. This operator does not create any new solution, instead it selects relatively good solutions from a population and deletes the remaining, not-so-good, solutions. Thus, the selection operator is a mix of two different concepts-reproduction and selection. When one or more copies of a good solution are reproduced, this operation is called reproduction. Multiple copies of a solution are placed in a population by deleting some inferior solutions. This concept is known as selection. Although some EC studies use both these concepts simultaneously, some studies use them separately.
