A **bijection** is a type of function in mathematics that establishes a one-to-one correspondence between elements of two sets. A function \( f: A \to B \) is called a bijection if it satisfies two main properties: 1. **Injective (One-to-One):** For every pair of distinct elements \( a_1, a_2 \in A \), \( f(a_1) \neq f(a_2) \).
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