"The" Jacobi identity is a relationship

between three elements A, B, and C, where [A, B] is the commutator. The elements of a Lie algebra satisfy this identity.
Relationships between the Q-functions
are also known as Jacobi identities:

equivalent to the Jacobi triple product (Borwein and Borwein 1987, p. 65) and

where

is the complete elliptic integral of the first kind, and
. Using Weber functions









(5) and (6) become


(Borwein and Borwein 1987, p. 69).

(1)
between three elements A, B, and C, where [A, B] is the commutator. The elements of a Lie algebra satisfy this identity.
Relationships between the Q-functions
are also known as Jacobi identities: 
(2)
equivalent to the Jacobi triple product (Borwein and Borwein 1987, p. 65) and

(3)
where

(4)
is the complete elliptic integral of the first kind, and
. Using Weber functions


(5)



(6)



(7)
(5) and (6) become

(8)

(9)
(Borwein and Borwein 1987, p. 69).

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