/**
* Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
*
* Please see distribution for license.
*/
package com.opengamma.strata.math.impl.rootfinding.newton;
import com.opengamma.strata.collect.array.DoubleArray;
import com.opengamma.strata.collect.array.DoubleMatrix;
/**
*
*/
public interface NewtonRootFinderDirectionFunction {
DoubleArray getDirection(DoubleMatrix estimate, DoubleArray y);
}