Reference : On the conjectural Leibniz cohomology for groups
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Mathematics
On the conjectural Leibniz cohomology for groups
Covez, Simon [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Mathematics Research Unit >]
Journal of K-theory: K-theory and its Applications to Algebra, Geometry, and Topology
[en] Leibniz algebra ; dendriform algebra ; Zinbiel algebra ; Zinbiel algebra ; group cohomology
[en] This article presents results which are consistent with conjectures about Leibniz (co)homology for discrete groups, due to J. L. Loday in 2003. We prove that rack cohomology has properties very close to the properties expected for the conjectural Leibniz cohomology. In particular, we prove the existence of a graded dendriform algebra structure on rack cohomology, and we construct a graded associative algebra morphism H •(−) → HR •(−) from group cohomology to rack cohomology which is injective for ● = 1.

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