2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152607This paper provides some background to the theory of operads, used in the first author's papers on 2d topological field theory (hep-th/921204, CMP 159 (1994), 265-285; hep-th/9305013). It is intended for specialists.70 pagesHigh Energy Physics - TheoryQuantum Algebratext