We isolate a class of groups -- called lossless groups -- for which homotopy
classes of G-Nββ operads are in bijection with certain restricted
transfer systems on the poset of conjugacy classes Sub(G)/G.Comment: v2: updates in response to referee report, accepted version in
Tunisian Journal of Mathematics; 24 pages, 16 figures. v1: 22 pages, 13
figures; comments welcome