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<?php
/*
* Math-Matrix library
*
* @author Ashley Kitson <akitson@zf4.biz>
* @copyright Ashley Kitson, UK, 2014
* @licence GPL V3 or later : http://www.gnu.org/licenses/gpl.html
* @link http://en.wikipedia.org/wiki/Matrix_(mathematics)
*/
namespace Chippyash\Math\Matrix\Interfaces;
use Chippyash\Math\Matrix\NumericMatrix;
use Chippyash\Matrix\Interfaces\InvokableInterface;
/**
* Interface for a NumericMatrix derivative
*
* Derivatives return a single value as a reult of their derivation, usually
* expected to be numeric
*
* @codeCoverageIgnore
*/
interface DerivativeInterface extends InvokableInterface
{
/**
* Compute derivative for a matrix
*
* @param NumericMatrix $mA
* @param mixed $extra Additional input required for derivative
* @return numeric
* @codeCoverageIgnore
*/
public function derive(NumericMatrix $mA, $extra = null);
}