Final Cover - For Printing

Module 74 : Sets

SETS

Set Language
George Ferdinand Ludwig Philip Cantor (1845-1918), a German mathematician developed
the concept of set language.

1. Set
   A set is a collection of well defined distinct objects.
   Eg. :A = {a, e, i, o, u}
   B = {Cow, Goat, Hen}

Provide the child with a few known objects, say for instance, a Braille slate, stylus and

an abacus. These objects are well defined and can form the elements of the set, say

“assistive devices for the blind”. Hence, if ‘C’ denotes this set then,

C = {Slate, Stylus, Abacus}

Note : It is conventional to denote a set by an English alphabet in capitals.

2. Element
   An object of a set is called an element or a member or an individual of the set.
   Normally a set is denoted by an upper-case letter like A or B and an element of a set
   by a lower-case letter such as x or y.

Eg.: A = { x, y, z}

Here x, y, z are called as the elements of the set.