Changes

A Topological space is a pair (X, T), where X is a set, and T is a collection of subsets of X that satisfy the following properties:

A Topological space is a pair (X, T), where X is a set, and T is a collection of subsets of X that satisfy the following axioms:

# The empty set and X are elements of T.

# The empty set and X are elements of T.

# The union of any collection of elements in T is in T.

# The union of any collection of elements in T is in T.

# The intersection of any finite collection of elements in T is in T.

# The intersection of any finite collection of elements in T is in T.

Elements in T are called [[Open Sets]].

Elements in T are called [[Open Sets]].