noun
one-to-one mapping; 1-to-1 mapping
Mathematical term for a mapping where each element of the domain maps to a unique element of the codomain, and vice versa.
この関数は一対一の写像になっている。
This function is a one-to-one mapping.
Compound of 一対一 (one-to-one) + の (possessive particle) + 写像 (mapping).