## Symbols

Symbols

1. (Belongs to)

2. (Does not belongs to)

3. :or (Such that)

4. < (Less than)

5. > (Greater than)

6. (And)

7. V (or)

8. (For every or For all)

9. (Implies that)

10. (Is implied by)

11. (If and only if) or (Implies and is implied by)

12. (Is a subset of)

13. (Is not a subset of)

14. (Is a super set of or Is contains)

15. (Is a proper subset of or Is contained in)

16. ⊄   (Is not a proper subset of or, Is not contained in)

17. (There exist)

18. (Union of sets)

19. (Intersection of sets)

20. U  (universal set )

21. Congruent

## Use inequality symbols

Use inequality symbols

The statement 4 + 2 = 6 is

an equation; it states that two quantities are equal. The statement 4 ≠ 6

(read “4 is not equal to 6”) is an inequality, a statement that two quantities

are not equal. When two numbers are not equal, one must be less than the

other. The symbol <  means “is less than.” For example,

8 < 9, -6 <, 15, -6 < – 1, and 0 < .

The symbol >  means “is greater than.” For example,

12 > 5, 9 > -2, and .

In each case, the symbol “points” toward the smaller number.