Consider the injections and given by

, where or .

(a) From the proof of Cantor-Schroder-Bernstein compute F(n) directly for n =

0, 1, 2, 3, 4 and find .

Is this just simply finding g o f? Like for n=2 it would be f(2) = 2 then g(0,2) = 6?

Or is it... Find x such that (g o f)(x) = 0,1,2,3,4?

OR! Is it something to do with the fact that... if i=0 then F(n) can be either 0,3,6, ... (3n + 0 basically). And if i=1 then F(n) can be either 1,4,7, ... (3n+1)..?

Since F isn't actually defined I'm not sure what it is.

AND. Since the CSB theorem is involved, there will be bijection A -> B so it makes me think that some values of n will equal 0,3,6, ... or 1,4,7 ... and the rest will have to be defined as something else...