# Discrete Structure lecture_6

Apr 28th, 2015
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It includes all the details about the Discrete structure with examples.Step by step solution.

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DISCREAT STRUCTURELECTURE # 6SET THEORYKHAWAJA TARIQ MAHMOODLecture # 6SET THEORYSINGLRTON SET:A set containing only one element is called a singleton set.EXAMPLE:A= {1}FINITE SET:If the numbers of elements in a set are finite, it is called a finite set.EXAMPLE:A= {1, 2, 3, 4, 5}INFINITE SET:If the numbers of elements in a set are not finite, it is called an infinite set.EXAMPLE:A= {1, 2, 3, 4, 5}UNION OF TWO SETS:The union of two sets A and B is a set consisting of all theelements of set A and set B. The symbol used for the union of two sets is .EXAMPLE:A 1,3,5, 7,9B 2,3,5, 7,11A B 1,3,5, 7,9 2,3,5, 7,11A B 1, 2,3,5, 7,9.11INTERSECTION OF TWO SETS:Khawaja Tariq Mahmood.Page 2Lecture # 6SET THEORYThe intersection of two sets A and B is a set consisting of all the commonelements of set A and set B. The symbol used for intersection of two sets is .EXAMPLE:A 1,3,5, 7,9B 2,3,5, 7,11A B 1,3,5, 7,9 2,3,5, 7,11A B 3,5, 7DIFFERENCE OF TWO SETS:If A and B are two sets, then their difference is givenby A B. A B is a set consists of all the elements of a set A which are not present in set B.EXAMPLE:A 2,3, 4,5B 3,5,11,15A B 2,3, 4,5 3,5,11.15A B 2, 4B A 11,15UNIVERSAL SET:A se

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