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#1 2013-05-02 12:01:54

limpfisch
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help with group theory please.

let a,b be members of a group (G,*). Show that if (a*b) inverse = (a inverse)*(b inverse) then a*b = b*a

#2 2013-05-02 17:10:18

bob bundy
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Re: help with group theory please.

hi limpfisch

For simplification I'll leave out the * (say, multiply), use I for the identity and  -1 for an inverse



multiply both sides by ab



Now multiply both sides by ba



Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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