src/Maths/Algebra/Matrix.php
public function serialize()
    {
        return serialize(array(
            'data'          =>$this->getData(),
            '_cache'        =>$this->_cache,
            '_walk_flag'     =>$this->getWalkFlag(),
            '_array_flag'    =>$this->getArrayFlag()
        ));
    }
public function serialize()
    {
        return serialize(array(
            'data'          =>$this->getData(),
            '_cache'        =>$this->_cache,
            '_walk_flag'     =>$this->getWalkFlag(),
            '_array_flag'    =>$this->getArrayFlag()
        ));
    }
Serialize a matrix: only `$data`, `$_cache` and `$flag` are stored

@return string