Regular Space | Every Subspace of a Regular Space is Regular | Regular Space is not Hausdorff Space

00:18 What is Regular Space?
01:32 Give an example to show that a regular space need not be a Husdorff space.
05:15 Show that every subspace of a regular space is regular.
Define Regular Space.
Regular space need not be a T_2 Space.
Regular space may not be a Husdorff space.