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What is $Aut_{Modk}(A)$ if A is a finite generated algebra, k is a field?

Is it a group of automorphisms of A as a vector space over k or what?

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    Usually that notation is used for the automorphism group of $A$ as a vector space.2011-01-28

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CW answer to push it out of unanswered queue:

"$Modk$" should refer to the category of $k$-modules ($k$-vector spaces).