1.1 Introduction
 | The theory of sets was developed by German mathematician Georg Cantor (1845-1918). He first encountered sets while working on “problems on trigonometric series”. |
Examples of sets:-
N: the set of all natural numbers
Z: the set of all integers
Q: the set of all rational numbers
R: the set of real numbers
Z+ : the set of positive integers
Q+: the set of positive rational numbers, and
R+: the set of positive real numbers.
Last modified: Friday, 24 June 2022, 8:13 PM