Question #e4125
2 Answers
Dec 28, 2016
Yes.
Explanation:
A function f associates to each element x of its domain
an image y = f(x) in its codomain.
Suppose by contradiction that the statement above is false.
Did you see? There exists "somebody" in the empty set. Who?
Q.E.A.
Dec 28, 2016
Yes. It is a function. See explanation.
Explanation:
According to a definition an association
#AA_{x in X} EE_{y in Y} f(x)=y#
In the given example the condition is fulfilled. The domain