Question

Let A={1,2,3}
How many elements will belong to the set {f:A->A}??

Answer 1

I'm not sure but I think 3

Answer 2

@TuringTest

Answer 3

It goes from A to A, so it should be 3..

Answer 4

but wait for Turing, I might be very wrong.

Answer 5

it is the same beacase it will only be its self

Answer 6

Should be 3. You are inserting some elements from the set A. The function is defined to produce an image, ALSO in set A. this of course has only 3 elements.

Answer 7

my text gives the answer 27