A permutation can be defined as a bijection (an invertible mapping, a one-to-one and onto function) from a set to itself: The identity permutation is defined by for all elements , and can be denoted by the number , by , or by a single 1-cycle (x).
A permutation can be defined as a bijection (an invertible mapping a one-to-one and onto func,tion) from a set to itself: The identity permutation is defined by for all elements , and can be denoted by the number , by , or by a single 1-cycle (x).