New posts in Operads

Do there exist algebras of more directions of operation than left-right?

How to characterize $E_n$ morphisms from $\mathrm{Mod}(A)$ to $\mathrm{Mod}(B)$?

Conceptual explanation for the sign in front of some binary operations

Does Koszul duality between $Comm$ and $Lie$ imply the power series identity $\exp(\ln(1-z))-1 = -z$?

Monoidal structures on modules over derived coalgebras

How many operad structures are there on the symmetric sequence of simplices / finitely-supported probability measures?

Is there a proof of the formality of configuration spaces of Euclidean spaces that do not involve operads?

Is it possible to construct an action of an $E_\infty$ operad on $BU$ that respects filtration by $BU(n)$?

In what sense are operads "better" than PROPs?

Definition of E-infinity operad