Geodesic
Secondary operations in the homology of the operad $E$
Izvestiya. Mathematics, Tome 40 (1993) no. 2, pp. 425-442 
V. A. Smirnov. Secondary operations in the homology of the operad $E$. Izvestiya. Mathematics, Tome 40 (1993) no. 2, pp. 425-442. http://geodesic.mathdoc.fr/item/IM2_1993_40_2_a5/
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Voir la notice de l'article provenant de la source Math-Net.Ru

This paper studies the homology of the $\Sigma$-free and acyclic operad $E$. It is shown that this homology constitutes a free Hopf bialgebra. Secondary operations are defined, relations established for them, and formulas obtained for their computation.

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