Eckmann–Hilton duality

Eckmann–Hilton duality is a concept in algebraic topology and category theory that describes a relationship between certain algebraic structures, particularly in the context of homotopy theory and higher algebra. It emerges in the study of operads and algebraic models of spaces, particularly homotopy types and their associated algebraic invariants. The duality is expressed within the framework of category theory, particularly in the context of monoidal categories and homotopy coherent diagrams.