1. relating to or denoting a one-to-one correspondence between two sets or collections; establishing a bijection
Usage: mathematics; formal

Examples

• A biunique mapping ensures that each element in the domain corresponds to exactly one element in the codomain, and vice versa.
• The function f(x) = 2x is biunique when both the domain and codomain are the set of all real numbers.
• In set theory, a biunique correspondence between two finite sets implies they have the same cardinality.
• The mathematician proved that the transformation was biunique by demonstrating both injectivity and surjectivity.