Criterion for being reflexive via Ext

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http://ift.tt/eA8V8J

In this question it was claimed that if a module M M over a noetherian domain R R satisfies Exti(M,R)=0 E x t i ( M , R ) = 0 for i=1,2 i = 1 , 2 , then M M is ...

from Algebra

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