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11 Let A be a commutative ring and M an A module Define the support of M by supp M p e spec A M
11 Let A be a commutative ring and M an A module Define the support of M by supp M p e spec A M 0 If M is finite over A show that supp M ann M where ann M is the annihilator of M in A that is the set of elements a E A such that aM 0
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