MultivariateDifferentiableFunction@Deprecated public interface DifferentiableMultivariateFunction extends MultivariateFunction
MultivariateFunction representing a differentiable
 multivariate real function.| Modifier and Type | Method and Description | 
|---|---|
| MultivariateVectorFunction | gradient()Deprecated.  Returns the gradient function. | 
| MultivariateFunction | partialDerivative(int k)Deprecated.  Returns the partial derivative of the function with respect to a point coordinate. | 
valueMultivariateFunction partialDerivative(int k)
 The partial derivative is defined with respect to point coordinate
 xk. If the partial derivatives with respect to all coordinates are
 needed, it may be more efficient to use the gradient() method which will
 compute them all at once.
 
k - index of the coordinate with respect to which the partial
 derivative is computedMultivariateVectorFunction gradient()
If only one partial derivative with respect to a specific coordinate is
 needed, it may be more efficient to use the partialDerivative(int) method
 which will compute only the specified component.
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