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Extensions panachées autoduales

Published online by Cambridge University Press:  06 March 2013

Daniel Bertrand
Daniel Bertrand*
Affiliation:
Institut de Mathématiques de Jussieubertrand@math.jussieu.fr

Abstract

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We study self-duality of Grothendieck's blended extensions in the context of a tannakian category. The set of equivalence classes of symmetric, resp. antisymmetric, blended extensions is naturally endowed with a torsor structure, which enables us to compute the unipotent radical of the associated monodromy groups in various situations.

Keywords

extensions panachéescatégories tannakiennesreprésentations unipotentes20G0520L05

Information

Type
Research Article
Information
Journal of K-Theory , Volume 11 , Issue 2 , April 2013, pp. 393 - 411
Copyright
Copyright © ISOPP 2013 

References

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