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March 15th, 2012, 06:32 AM  #1 
Newbie Joined: Mar 2012 Posts: 4 Thanks: 0  Infinite set contains an infinite number of subsets
How would I go about proving that an infinite set X contains an infinite number of subsets? I thought about observing oneelement subsets of set X and showing that the number of these subsets is equal to the number of elements in the set X, but I'm not sure how to properly put it on paper. Thanks for your help. 
March 15th, 2012, 11:28 AM  #2 
Senior Member Joined: Feb 2012 Posts: 628 Thanks: 1  Re: Infinite set contains an infinite number of subsets
Here is a simple proof: Let T be the set of all subsets of S (which is an infinite set) having exactly one element. Clearly, T is an infinite set because S has an infinite number of distinct elements.


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infinite, number, set, subsets 
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