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Since fis surjective, 9a2Asuch that g(a) = b Then, (g f)(a) = g(f(a)) = c, hence g fis a surjection De nition 111 (Bijection) A function f A!Bis a bijection if f is an injection and a surjection Theorem 17 If f A!Band g B!Care bijections, then g f A!C is a bijection Proof Composition of surjections is a surjection, andT e e x l z o p n r h i e w h s b a p k i e a b c o t d e n n f a d g s p i j o k k l r r m n e t w o g u e s s p q a r s t d a u f e e l v w n x m y z a b k c u d b e l i e v e f word search puzzle words to find s e e h e a r0 ' ( 2 3 4 5 4 6 7 8 9 & ' ! Distributions Of A General Reduced Order Dependence Measure And Conditional Independence Testing Springerlink ƒ~ƒfƒBƒAƒ€ ƒp[ƒ} ƒZƒbƒg•û–@