Algebraic Operations
====================

.. highlight:: cpp


Just like in v1.x, OpenCV 2.x provides some basic functions operating on matrices, like 
``add``
,
``subtract``
, 
``gemm``
etc. In addition, it introduces overloaded operators that give the user a convenient
algebraic notation, which is nearly as fast as using the functions directly. For example, here is how the least squares problem 
:math:`Ax=b`
can be solved using normal equations:



::


    
    Mat x = (A.t()*A).inv()*(A.t()*b);
    

..

The complete list of overloaded operators can be found in 
:ref:`Matrix Expressions`
.