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  3. let a, b be sets and f : a ? b and g : b ? c . cha

Let A, B be sets and f : A ? B and g : B ? C . Characterize when g ? f : A ? C is a bijection.

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Question

Advance Math

Let

A, B

be sets and

f

:

A

?

B

and

g

:

B

?

C

. Characterize when

g

?

f

:

A

?

C

is a bijection.

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