CONTENTS :-
1. GROUP OF SYMMETRIES, 2. GROUPS : DEFINITION AND EXAMPLES, 3. ELEMENTARY PROPERTIES OF GROUP, 4. ORDER OF GROUP AND ORDER OF GROUP ELEMENTS, 5. SUBGROUPS, 6. CYCLIC GROUPS, 7. COSETS AND LAGRANGES THEOREM, 8. GROUP HOMOMORPHISM, 9. FACTOR GROUP ( QUOTIENT GROUPS), 10. GROUP ISOMORPHISMS, 11. EXTERNAL DIRECT PRODUCT OF GROUP, 12. INTERNAL DIRECT PRODUCT