SYMBOL OF SETS
Symbol Meaning
X ϵ A X is the member of the Set ‘A’
X ∉ A X is not a member of the set A
n(A) The number of distinct member of A
A ↔ B A & B are equivalent set
A = B A & B are equal sets, that is B ⊆ A, A ⊆ B
A ⊆ B A is a subset of B, that is every member of A is a member of B
n(φ) φ is the empty set
{ 0,1, 2, 3,…..} Set of whole numbers
{ 1, 2, 3, 4,….} Set of natural numbers
{…..,-2, -1, 0, 1, 2,…..} Set of Integers