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Homework Statement
List all the functions from {1,2,3} to {1,2} representing each function as an arrow
diagram. Which of these functions are (a) injective, (b) surjective, (c) bijective? For
each surjective function write down a right inverse.
Homework Equations
The Attempt at a Solution
The only one I can think of is,
f(x) = x - 1, where X is all real numbers,
and in the directions it specifically asks for functionS...