
arXiv: 2406.04945
handle: 10067/2137700151162165141
We show that, if one allows for curved deformations, the canonical map introduced by Keller and Lowen [Int. Math. Res. Not. IMRN 17 (2009), 3221–3235] between Morita deformations and second Hochschild cohomology of a dg algebra becomes a bijection. We also show that a bimodule induces an equivalence of curved deformations precisely when it induces an equivalence between the respective 1 1 -derived categories. These results, together with the results of Lehmann and Lowen [Filtered derived categories of curved deformations, https://arxiv.org/abs/2402.08660, 2024], offer a solution to the curvature problem for first order deformations.
Morita deformations, (Co)homology of rings and associative algebras (e.g., Hochschild, cyclic, dihedral, etc.), dg algebras, Mathematics - K-Theory and Homology, FOS: Mathematics, K-Theory and Homology (math.KT), 16E40 (Primary), 18G70 16E45, 18G80 (Secondary), curved dg algebras (cdg), Mathematics, Hochschild cohomology, 1-derived category cdg bimodule
Morita deformations, (Co)homology of rings and associative algebras (e.g., Hochschild, cyclic, dihedral, etc.), dg algebras, Mathematics - K-Theory and Homology, FOS: Mathematics, K-Theory and Homology (math.KT), 16E40 (Primary), 18G70 16E45, 18G80 (Secondary), curved dg algebras (cdg), Mathematics, Hochschild cohomology, 1-derived category cdg bimodule
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