This paper constructs tensor hierarchy algebras W(g+) and S(g+) for Kac-Moody extensions of finite-dimensional simply laced Lie algebras and gives their local module content, with a companion representation identity that remains partially verified.
Oxidizing Borcherds symmetries
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abstract
The tensor hierarchy of maximal supergravity in D dimensions is known to be closely related to a Borcherds (super)algebra that is constructed from the global symmetry group E(11-D). We here explain how the Borcherds algebras in different dimensions are embedded into each other and can be constructed from a unifying Borcherds algebra. The construction also has a natural physical explanation in terms of oxidation. We then go on to show that the Hodge duality that is present in the tensor hierarchy has an algebraic counterpart. For D>8 the Borcherds algebras we find differ from the ones existing in the literature although they generate the same tensor hierarchy.
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Tensor hierarchy algebras and extended geometry I: Construction of the algebra
This paper constructs tensor hierarchy algebras W(g+) and S(g+) for Kac-Moody extensions of finite-dimensional simply laced Lie algebras and gives their local module content, with a companion representation identity that remains partially verified.