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 Gender:
 Male
 Birthday:
 Jan 9, 1991 (Age: 24)
 Occupation:
 Lazy student
Aldrein
Male, 24
 Aldrein was last seen:
 Apr 13, 2015
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About
 Gender:
 Male
 Birthday:
 Jan 9, 1991 (Age: 24)
 Occupation:
 Lazy student
 Real Name:
 I do not have a real name. I live in a complex world, not a real one.
 Favorite Pokémon:
 Golduck.
 My Characteristic:
 Somewhat of a clown
Let X be a set and let τ be a family of subsets of X. Then τ is called a topology on X if:
 Both the empty set and X are elements of τ
 Any union of elements of τ is an element of τ
 Any intersection of finitely many elements of τ is an element of τ
The members of τ are called open sets in X. A subset of X is said to be closed if its complement is in τ (i.e., its complement is open). A subset of X may be open, closed, both, or neither. The empty set and X itself are always both closed and open.Interact
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