Publisher： Cambridge University Press
E-ISSN： 1865-5394|11|2|393-411
ISSN： 1865-2433
Source： Journal of K-Theory, Vol.11, Iss.2, 2013-03, pp. : 393-411
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Abstract
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.
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