mehtamonica
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Suppose that there is an integer n>1, such that an=a for all elements of some ring. If m is a positive integer and am=0 for some a , then I have to show that a=0. Please suggest.
Prove a=0 for Ring Theory Question with m,n Positive Ints
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hi mehtamonica! 
if m ≤ n, it's obvious
and for m > n … ?
if m ≤ n, it's obvious
and for m > n … ?