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Subsets and Groups 
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#1
May2212, 03:08 AM

P: 1

Hey guys, I'm having an issue with a question, namely
Let x be a subset of S_{4}. Is x a group? x = {e, (123), (132), (12)(34)} I don't really understand how I can test the 4 axioms of a group and how x being a subset of S_{4} would help? 


#2
May2212, 06:03 AM

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P: 11,748

You have only four elements. Why not just write out the entire multiplication table and see if you have a group on your hands?



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