EllipticExpPrime[EllipticLog[{Subscript[z, 1], Subscript[z, 2]}, {a, b}], {a, b}][[1]] == 2 Subscript[z, 2] /; Subscript[z, 1]^3 + a Subscript[z, 1]^2 + b Subscript[z, 1] - Subscript[z, 2]^2 == 0

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2001-10-29