Loday's conjecture on Leibniz homology of abelian groups

Let GG be an abelian group, let k\Bbbk be a field, let HLn(G,k)\mathrm{HL}_n(G,\Bbbk) denote Leibniz homology, and let Hn(G,k)\mathrm{H}_n(G,\Bbbk) denote Eilenberg–MacLane homology. Write Tn(Gk)\mathrm{T}^n(G\otimes\Bbbk) for the nn-fold tensor power and Λn(Gk)\Lambda^n(G\otimes\Bbbk) for the nn-th exterior power. Loday's conjecture. The Leibniz homology of GG has a connected coZinbiel-associative bialgebra structure. For every nNn\in\mathbb{N}, there is an isomorphism

HLn(G,k)Tn(Gk),\mathrm{HL}_{n}(G,\Bbbk) \simeq \mathrm{T}^n(G \otimes \Bbbk),

and, if k\Bbbk has characteristic 00, the natural morphism to ordinary homology is the canonical projection

HLn(G,k)Hn(G,k),Tn(Gk)Λn(Gk).\mathrm{HL}_n(G,\Bbbk) \to \mathrm{H}_n(G,\Bbbk),\qquad \mathrm{T}^n(G \otimes \Bbbk) \to \Lambda^n(G \otimes \Bbbk).

This is the abelian-group analogue of the corresponding Leibniz and Chevalley–Eilenberg homology properties for abelian Lie algebras; the supplied text gives no evidence that the conjecture has been resolved.

Sources & referencesView supporting material

Primary source

Simon Covez, “Rack homology and conjectural Leibniz homology”, arXiv:1402.1625 (2014).

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