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assigned tag 0B8J 2015-04-28 bb84e81
Tags: Added new tags
created statement with label lemma-finite-presentation-stalk-free in modules.tex 2015-04-26 a4ec397
Better handling invertible modules

Of course an invertible module should be defined as a module such that
tensoring with it is a self-equivalence on the category of modules. This
doesn't change a thing beyong the definition, because we usually are
working on locally ringed spaces or topoi where an invertible module is
the same thing as a locally free module of rank 1.