"The" Jacobi identity is a relationship [A, [B, C]] + [B, [C, A]] + [C, [A, B]] = 0, , between three elements A, B, and C, where [A, B] is the commutator. The elements of a Lie algebra satisfy this identity.

commutator | Jacobi triple product | partition function Q | Q-function | Weber functions

Carl Jacobi