The 2-group of linear auto-equivalences of an abelian category and its Lie 2-algebra

Details The 2-group of linear auto-equivalences of an abelian category and its Lie 2-algebra The 2-group of linear auto-equivalences of an abelian category and its Lie 2-algebra

2009-10-29

arxiv.org/abs/0910.5699v1

Mathematics

Category Theory

47 pages, preliminary version. Comments welcome at any time

Scientific paper

For any abelian category \calC satsifying (AB5) over a separated, quasi-compact scheme S, we construct a stack of 2-groups \GL(\calC) over the flat site of S. We will give a concrete description of \GL(\calC) when \calC is the category of quasi-coherent sheaves on a separated, quasi-compact scheme X over S. We will show that the tangent space \gl(\calC) of \GL(\calC) at the origin has a structure as a Lie 2-algebra.

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