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bijective

Upper-Intermediate (B2)

IPA: //bɪˈdʒɛktɪv//

KK: /bɪˈdʒɛk.tɪv/

adjective
Definition

A type of function in mathematics where each input is paired with exactly one unique output, and each output is paired with exactly one unique input.


Example

In mathematics, a bijective function ensures that every element of the domain corresponds to a unique element in the codomain.


Conversation
Sloth A
Have you ever heard of a bijective function in math?
Sloth B
Yeah, I think it means it's both injective and surjective, right?
Sloth A
Exactly! It’s cool how those concepts connect in such a neat way.
Sloth B
For sure! Understanding bijective mappings can really help with advanced topics.

Synonyms & Antonyms
Synonyms
one-to-one
invertible
corresponding
Antonyms
noninjective
nonbijective
noninvertible
Root Explanation

Bijective → It is formed from "bi-" (meaning two) and "ject" (from Latin "jacere", meaning to throw). The word describes a function that pairs each element of one set with exactly one element of another set, thus establishing a two-way relationship.

Memory Tip

Think of 'two' ('bi-') things being 'thrown' together ('ject') in a way that each one matches perfectly with another.

Visually Confused Words
objective
abjective
subjective
ejective
unobjective
objectivize
objectively
objectivate
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