Nonassociative geometry in quasi-Hopf representation categories I: Bimodules and their internal homomorphisms |
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Institution: | Department of Mathematics, Heriot-Watt University, Colin Maclaurin Building, Riccarton, Edinburgh EH14 4AS, United Kingdom;Maxwell Institute for Mathematical Sciences, Edinburgh, United Kingdom;The Tait Institute, Edinburgh, United Kingdom |
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Abstract: | We systematically study noncommutative and nonassociative algebras and their bimodules as algebras and bimodules internal to the representation category of a quasitriangular quasi-Hopf algebra. We enlarge the morphisms of the monoidal category of -bimodules by internal homomorphisms, and describe explicitly their evaluation and composition morphisms. For braided commutative algebras the full subcategory of symmetric -bimodule objects is a braided closed monoidal category, from which we obtain an internal tensor product operation on internal homomorphisms. We describe how these structures deform under cochain twisting of the quasi-Hopf algebra, and apply the formalism to the example of deformation quantization of equivariant vector bundles over a smooth manifold. Our constructions set up the basic ingredients for the systematic development of differential geometry internal to the quasi-Hopf representation category, which will be tackled in the sequels to this paper, together with applications to models of noncommutative and nonassociative gravity such as those anticipated from non-geometric string theory. |
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Keywords: | Noncommutative/nonassociative differential geometry Quasi-Hopf algebras Braided monoidal categories Internal homomorphisms Cochain twist quantization |
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