Set Theory
SETS AND SUBSETS
A set should be a well specified collection of objects. “it must be possible for us to decide whether the object belongs to the collection ( under consideration) or not.
We use capital letter to represent sets and lowercase letters to represent elements. For set A we write if x is an elements of A : indicates that y is not a member of A.
A set can be designated by listing its elements within set braces ( tabulation methods).
