کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6425898 | 1633845 | 2013 | 45 صفحه PDF | دانلود رایگان |
This paper is the first part of a project aimed at understanding deformations of triangulated categories, and more precisely their dg and Aâ models, and applying the resulting theory to the models occurring in the Homological Mirror Symmetry setup. In this first paper, we focus on models of derived and related categories, based upon the classical construction of twisted objects over a dg or Aâ-algebra. For a Hochschild 2 cocycle on such a model, we describe a corresponding “curvature compensating” deformation which can be entirely understood within the framework of twisted objects. We unravel the construction in the specific cases of derived Aâ and abelian categories, homotopy categories, and categories of graded free qdg-modules. We identify a purity condition on our models which ensures that the structure of the model is preserved under deformation. This condition is typically fulfilled for homotopy categories, but not for unbounded derived categories.
Journal: Advances in Mathematics - Volume 243, 20 August 2013, Pages 330-374