Group Elements a,b,c,d,e: Inverse Operation?

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The discussion centers on the group operation involving elements a, b, c, d, and e, specifically questioning whether the equation abcde = ab(d^-1c^-1)e holds true. The conclusion drawn is that this equation is false, as demonstrated by manipulating the equation to cd = (d^-1 c^-1), which leads to the assertion that cd does not equal its own inverse. Thus, the operation of changing elements in the middle of a group operation using inverses is not valid in this context.

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Lets say i have elements a,b,c,d,e in some group.


is abcde always = ab(d^-1c^-1)e. My question is and you change elements in the middle of an operation by using the inverse?
 
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Certainly this is not true. Take your equation and cancel the a, b, and e by multiplying on the appropriate side by the appropriate inverse in each case. You are left with

cd = (d^-1 c^-1)

and the right hand side is equal to (cd)^-1.

Obviously in general, cd does not equal its own inverse, so the equation is false.
 

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