Topological Spaces Flashcards
(3 cards)
1
Q
What is a topological space?
A
A pair (X,τ), where X is a set and τ is a collection of subsets of X satisfying the topology axioms.
2
Q
What is an open set?
A
A set in τ.
3
Q
What is a closed set?
A
A set whose complement is open.
