"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


(2)
equivalent to the Jacobi triple product (Borwein and Borwein 1987, p. 65) and

(3)
where

(4)





(5)



(6)



(7)
(5) and (6) become

(8)

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