Extensions panachées autoduales
Abstract
We study self-duality of Grothendieck's blended extensions (extensions panachées) 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
- Publication:
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arXiv e-prints
- Pub Date:
- November 2010
- DOI:
- arXiv:
- arXiv:1011.4685
- Bibcode:
- 2010arXiv1011.4685B
- Keywords:
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- Mathematics - Algebraic Geometry;
- 14L10;
- 20G05
- E-Print:
- 17 pages