JacobiAmplitude
 Usage
• JacobiAmplitude[u, m] 给出Jacobi椭圆函数的幅值  。
Notes
• JacobiAmplitude[u, m] 转换一个椭圆函数的自变量  成幅值  。 • JacobiAmplitude 是第一类型的椭圆积分的逆。如果  , 则  .
 Further Examples
When the modulus  is a real number in the interval  , JacobiAmplitude is inverse to EllipticF (both being considered as functions of the first argument).
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This is the derivative.
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This is a series expansion around  .
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