Injective, surjective, bijective definitions (One-one: distinct inputs → distinct outputs; Onto: every codomain)
jee-mainjee-advanced
One-one: distinct inputs → distinct outputs; Onto: every codomain element hit; Bijective: both
What each symbol means
| Symbol | What it stands for |
|---|---|
| X | Domain |
| Y | Codomain |
| f | Function X → Y |
When to use this
Functions as per JEE set-theoretic definition f ⊆ X×Y with unique second coordinate for each x ∈ X.