## NEKG33 Mathematical methods for economists

## Chapter 23 : Day 23: Matrix multiplication

### By Lund University

Not as simple as multiplying two numbers but not too hard either.

## Matrix multiplication

This section is an entirely devoted to matrix multiplication. We look at under which conditions you are allowed to multiply two matrices, the exact method of how to multiply two matrices and all the rules that apply to matrix multiplication.

#### Dot product

#### Matrix multiplication, dimension

#### Matrix multiplication, computation

#### Matrix multiplication, rules

## Matrix multiplication: Problems

Exercises on matrix multiplication