let x and y be sets. define f : p(x) × p(y ) ? p(x ? y ) by f(a, b) = a ? b.
(a) prove tha...
Mathematics, 30.07.2019 17:20, nallaico585
let x and y be sets. define f : p(x) × p(y ) ? p(x ? y ) by f(a, b) = a ? b.
(a) prove that f is a surjection.
(b) is f necessarily an injection? either prove it in general or find a counterexample.
Answers: 2
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