Is the empty set welldefined Why or why notSolutionA set is

Is the empty set well-defined? Why or why not?

Solution

A set is well-defined if there is no ambiguity as to whether or not an object belongs to it, i.e., a set is defined so that we can always tell what is and what is not a member of the set.

Empty set contains no elements so we are are that no element belongs to empty set.

So empty set is well defined.