a mathematical function or mapping that is both an injection and a surjection and therefore has an inverse
See also injection (sense 5), surjection
bijection in American English
(baiˈdʒekʃən)
noun
Math
a map or function that is one-to-one and onto
Word origin
[1965–70; bi-1 + -jection, as in projection]This word is first recorded in the period 1965–70. Other words that entered Englishat around the same time include: Coriolis effect, T cell, hired gun, no-fault, wraparoundbi- is a combining form meaning “twice,” “two,” used in the formation of compound words.Other words that use the affix bi- include: bilabial, bilateral, bilingual, bimodal, bisect