Higher structures for Lie $H$-pseudoalgebras

Abstract: Let $H$ be a cocommutative Hopf algebra. The notion of Lie $H$-pseudoalgebra is a multivariable generalization of Lie conformal algebras. In this paper, we study some higher structures related to Lie $H$-pseudoalgebras where we increase the flexibility of the Jacobi identity. Namely, we first introduce $L_\infty$ $H$-pseudoalgebras (also called strongly homotopy Lie $H$-pseudoalgebras) as the homotopy analogue of Lie $H$-pseudoalgebras. We give several equivalent descriptions of such homotopy algebras and show that some particular classes of these homotopy algebras are closely related to the cohomology of Lie $H$-pseudoalgebras and crossed modules of Lie $H$-pseudoalgebras. Next, we introduce another higher structure, called Lie-$2$ $H$-pseudoalgebras which are the categorification of Lie $H$-pseudoalgebras. Finally, we show that the category of Lie-$2$ $H$-pseudoalgebras is equivalent to the category of certain $L_\infty$ $H$-pseudoalgebras.