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The 2-group of symmetries of a split chain complex
2-group of symmetries split chain complex
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2011/1/19
We explicitly compute the 2-group of self-equivalences and (homotopy classes of) chain homotopies between them for any split chain complex A• in an arbitrary K-linear abelian category (K any com...
On a twisted de Rham complex, II
Twisted de Rham complex vanishing cycles monodromy
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2011/2/22
We prove an algebraic formula, conjectured by M. Kontsevich, for com-puting the monodromy of the vanishing cycles of a regular function on a smooth complex algebraic variety.