The basic point of this part is to formulate systems of linear equations in terms of matrices. We can then view them as analogous to an equation like 7_x_ = 5.

In order to use them in systems of equations we will need to learn the algebra of matrices; in particular, how to multiply them and how to find their inverses.

Geometrically, a linear equation in x, y and z is the equation of a plane. Solving a system of linear equations is equivalent to finding the intersection of the corresponding planes.

» Session 9: Matrix Multiplication

» Session 10: Meaning of Matrix Multiplication

» Session 11: Matrix Inverses

» Session 12: Equations of Planes II

» Session 13: Linear Systems and Planes

» Session 14: Solutions to Square Systems

» Problem Set 2