InverseJacobiCD[z, m] \[Proportional] InverseJacobiCD[Subscript[z, 0], m] - (z - Subscript[z, 0])/(Sqrt[1 - Subscript[z, 0]^2] Sqrt[1 - m Subscript[z, 0]^2]) - ((Subscript[z, 0] (1 + m - 2 m Subscript[z, 0]^2))/ (2 (1 - Subscript[z, 0]^2)^(3/2) (1 - m Subscript[z, 0]^2)^(3/2))) (z - Subscript[z, 0])^2 + O[(z - Subscript[z, 0])^3]

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2007-05-02