public interface  oadd.org.apache.commons.math.analysis.DifferentiableMultivariateFunction extends java.lang.Object implements oadd.org.apache.commons.math.analysis.MultivariateFunction
{
public abstract oadd.org.apache.commons.math.analysis.MultivariateFunction partialDerivative(int);
public abstract oadd.org.apache.commons.math.analysis.MultivariateVectorFunction gradient();
}