1.2 - Relations between collection

1. Concept

1.1 empty set

• definition

  Does not contain any element of the collection is called the empty set , denoted by Ø
  empty set can be symbolized as Ø = {x | x ≠ x }
  empty set is absolutely unique
  empty set is non-empty subset of any set of

• Examples
  set A = {x | x $ \ in $ R, x $ ^ 2 $ <0}, then Ø = A
  | Ø | = 0, | {Ø} |. 1 =

1.2 Collection

• definition

  For a particular range, we consider the collection of all objects called corpus , referred to as U or E
  is generally rectangular in use the Venn diagram showing corpus
  corpus is relatively unique

• For example
  in solid geometry, Collection of all points in space is composed
  in our census, corpus is composed of all

2. The relationship between the set

2.1 equal relationship

2.2 contains relations

• eg1: two sets proved equally

  

• N subset element sets: eg2

  

3. The power set