“…Under the Koszul duality the operad of Zinbiel algebras is dual to the operad of Leibniz algebras. Zinbiel algebras were studied in [1,2,13,16,17]. 1 The work was supported by RFBR 16-31-50017, 14-01-00014, FAPESP 14/19521-3, 14/24519-8 and by R & D 6.38.191.2014 of Saint-Petersburg State University, "Structure theory, classification, geometry, K-theory and arithmetics of algebraic groups and related structures".…”