public function __construct(Matrix $a = NULL, Matrix $b = NULL) { parent::__construct(); }
public function __construct(Matrix $a, Matrix $b) { parent::__construct($a, $b); }
public function __construct(Matrix $a = NULL, Matrix $b = NULL) { parent::__construct(); }
public function __construct(Matrix $a, Matrix $b) { parent::__construct($a, $b); }