Answer to Question #325220 in Linear Algebra for Mzalume

Question #325220

Let f : A → B be a one-to-one correspondence, f

−1

: B → A is

also a one-to-one correspondence.

1. Prove that f

−1 ◦ f = iA.

2. Prove that f ◦ f

−1 = iB.

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